{"title":"Biometric Click Boards™","description":"\u003cp\u003eWelcome to The Debug Store, your ultimate destination for cutting-edge electronic components and development boards. Discover the remarkable world of MikroE Biometric Click Boards™, designed to provide secure and reliable biometric authentication solutions for your projects.\u003c\/p\u003e\n\u003cp\u003eWhat are Biometric Click Boards™? Biometric Click Boards™ by MikroE are compact and versatile add-on boards that integrate advanced biometric sensors and algorithms into your microcontroller-based systems. These boards enable seamless integration of biometric identification technologies, allowing you to enhance security, streamline access control, and develop personalized applications.\u003c\/p\u003e","products":[{"product_id":"heart-rate-click-board-mikroe-2000-uk","title":"Heart Rate Click Board™","description":"\u003cp\u003e\u003ciframe allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" frameborder=\"0\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Q0AQaSD9ubY\" title=\"YouTube video player\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe\u003cem\u003e\u003cstrong\u003e Heart Rate Click Board™\u003c\/strong\u003e\u003c\/em\u003e is a heart rate monitoring and pulse oximetry measuring Click board™. It features an advanced oximeter and heart rate monitoring sensor, which relies on two integrated LEDs, a photosensitive element, and a very accurate and advanced low noise analog front end, to provide clean and accurate readings. It is enough to place an index finger on a top of the sensor to get both of the heart rate and blood oxygen saturation via the I2C interface. Features, such as the Ambient Light Cancellation (ALC) and the discrete time filters, ensure that no ambient light or 50\/60Hz hum is interfering with the readings.\u003c\/p\u003e\n\n\u003cp\u003eOne of the more important features of this device is its  \u003cstrong\u003elow power consumption \u003c\/strong\u003e: it is possible to put the device into the Standby mode, where it consumes a very low amount of power. All those features make this Click board™ an ideal solution for various heart-rate and SpO2 related applications, as well as the development of new algorithms for reading blood parameters based on the red and infra-red absorbance properties of the human body, mainly for the arterial blood oxygen saturation (SpO2) and heart rate (HR).\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Heart Rate Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe measurement of the hemoglobin oxygen saturation (HbO2) by measuring the absorbance of the red and IR light of the pulsating components was introduced in 1935 by Karl Matthes, a German physician. At first, there were no good photo-detectors and instead, the IR band, the green band of the light spectrum was used. As the technology advanced, more reliable methods of light detection were developed, and the green light was replaced with the IR light. Nowadays, advanced algorithms allow separation between the signals of the pulsating arterial blood and moving venous blood, allowing for more accurate and reliable readings. The \u003cstrong\u003eHeart Rate Click Board™\u003c\/strong\u003e features the MAX30100 a modern, integrated pulse oximeter and heart rate sensor IC, from Maxim Integrated.\u003cbr\u003e\n\u003cimg alt=\"Heart rate click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-click-inside-image.jpg\" src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-click-inside-image.jpg\"\u003e\u003cbr\u003e\nThis sensor features  \u003cstrong\u003etwo integrated LEDs \u003c\/strong\u003e with the RED and IR LEDs, used to emit the respective wavelengths. The wavelengths of these LEDs are 660nm and 880nm, respectively. The reflected light is detected by a red\/IR photo-detector element and sampled by a low noise delta-sigma 16bit ADC. The analog front end of the MAX30100 sensor features an Ambient Light Cancellation (ALC) section, which eliminates light pollution of the photo-detector element. The 16bit ADC is filtered by a discrete time filter to prevent 50\/60Hz interference and hum. The output sampling frequency can be adjusted from 50Hz to 1kHz. There is also a  \u003cstrong\u003etemperature sensor \u003c\/strong\u003e, which can be utilized to compensate for the changes in the environment and to calibrate the measurements.\u003c\/p\u003e\n\n\u003cp\u003eThe MAX30100 sensor has the FIFO buffer, 16 words deep. The FIFO buffer stores the measured values and it can generate an interrupt when the buffer is full, allowing the host MCU to perform other tasks while the data is collected by the sensor.\u003c\/p\u003e\n\n\u003cp\u003eThe integrated LED drivers are operated with pulses of selectable width: pulses can vary from 200µs to 1600µs. The width of the pulse affects the available ADC bit depth and sample rate. The pulse width of 1600µs will allow maximal resolution of 16 bits with the highest sample rate of 1 ksps, while the pulse width of 200µs will only allow 100 sps for 16 bits resolution. Reducing the resolution to 13 bits will allow the full sample rate speed of 1ksps. Control of the LED pulse width, along with the programmable LED current, allows for an optimization of the measurement precision and power consumption. The power supply for the LEDs is taken directly from the 3.3V rail of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eTo improve the measurements, the MAX30100 sensor employs a temperature sensor. This is a reasonably precise temperature sensor, which measures the die temperature with the accuracy of ±1˚C in the range of -40˚C to +85˚C. This sensor can be read from its data register and can be optionally used to compensate the sensor readings to the environmental temperature fluctuations. However, several other external factors can affect the precision of the device: besides the temperature, readings can be negatively affected by the excess motion, too. Also, too much pressure can constrict capillary blood flow and therefore diminish the reliability of the data. Those problems arise from the nature of the measurement method and should be considered while developing own application.\u003c\/p\u003e\n\n\u003cp\u003eThe MAX30100 sensor is supplied by the small LDO, which outputs clean and ripple free 1.8V for the internal logic and photo-detector element of the sensor. The input voltage is also taken from the 3.3V power rail of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eBesides the I2C lines of the sensor IC, routed to the respective mikroBUS™ SCL and SDA lines, the interrupt line from the sensor is also routed to the mikroBUS™ INT pin. By setting the appropriate INT register, the interrupt can be generated and enabled for 5 different sources: power ready, SpO2 ready, HR ready, temp ready, FIFO full. The power ready interrupt is enabled by default and can't be disabled in software, but all other interrupts can be disabled or enabled, depending on the requirements of the application. Each interrupt is reported by the status bit in the interrupt status register and by pulling the INT line to a LOW logic state. The INT line is an open-drain, so it is pulled up to the HIGH logic level by the onboard resistor.\u003c\/p\u003e\n\n\u003cp\u003eThe extensive information for the MAX30100 sensor and its registers can be obtained from the MAX30100 datasheet. However, the provided library offers simple and easy to use functions, used to configure the device and measure the SpO2 and HR properties of the human body. Those functions are demonstrated in the included application example, which can be used as a reference for a custom design.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,Heart Rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eDeveloping algorithms for pulse oximetry and heart rate readings through the tip of a finger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMaxim's MAX30100 integrated pulse oximetry and heart-rate sensor\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eOptical sensor: IR and red LED combined with photodetector. Measures absorbance of pulsing blood\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eHeart Rate Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nONBOARD JUMPERS AND SETTINGS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault \u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003eLED\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768360034493,"sku":"MIKROE-2000","price":16.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-click-board-28886988718269.jpg?v=1685027635"},{"product_id":"heart-rate-3-click-board-mikroe-2036-uk","title":"Heart Rate 3 Click Board™","description":"\u003cp\u003eThe SFH7050 multichip package contains 3 LEDs and one photodiode separated with a light barrier to prevent optical crosstalk. When the three LEDs shine through a subject's finger, some of the light is absorbed by the pulsating blood.\u003cbr\u003e\n\u003cbr\u003e\nThe analog reading from the SFH7050 is forwarded to the AFE chip that is able to derive pulse readings from the intensity of the reflected light.\u003c\/p\u003e\n\n\u003cp\u003eAFE4404 is highly-configurable and adaptable for different usage scenarios (different lighting conditions or skin tones) making the \u003cstrong\u003eHeart Rate 3 Click Board™\u003c\/strong\u003e a robust heart rate monitoring solution.\u003c\/p\u003e\n\n\u003cp\u003eThe board communicates with the target MCU through the mikroBUS™ I2C interface, with additional functionality provided by RST, CLK and RDY pins.\u003cbr\u003e\n\u003cbr\u003e\nThe \u003cstrong\u003eHeart Rate 3 Click Board™\u003c\/strong\u003e works on a 3.3V power supply, but an onboard jumper allows you to set the voltage for driving the SFH7050 LEDs at either 3.3V or 5V.\u003c\/p\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768366588093,"sku":"MIKROE-2036","price":32.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-3-click-board-30247813677245.jpg?v=1685197382"},{"product_id":"ecg-click-board-mikroe-2455-uk","title":"ECG Click Board™","description":"\u003ch3\u003eHow Does The ECG Click Board Work\u003c\/h3\u003e\n\n\u003cp\u003eThe\u003cem\u003e\u003cstrong\u003e ECG Click Board™\u003c\/strong\u003e \u003c\/em\u003eis fitted with a 3.5mm jack to which three electrodes are connected. The electrodes will detect the electrical activity of the heart and drive the signal to the 3.5mm jack. After that, the signal needs to be amplified and filtered, therefore the click also contains two amplifiers, two high-pass filters and one low-pass filter.\u003c\/p\u003e\n\n\u003cp\u003eOnce the data is acquired, amplified and filtered, it is sent to one analog pin. The MCU then reads this analog data, converts it to digital, this digital data presents the value of the electrical activity of the heart at that particular moment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/ecg-click-libstock.jpg\" src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/ecg-click-libstock.jpg\"\u003e The\u003cem\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/em\u003e\u003cstrong\u003eECG Click Board™\u003c\/strong\u003e gathers data from three electrodes, so where do we attach these electrodes? The electrodes have a naming convention, and each has one of these abbreviations: \u003cstrong\u003eLA, RA, LL\u003c\/strong\u003e - meaning Left Arm, Right Arm, Left Leg. You can already see where this is going, one electrode is placed on the left arm, one on the right arm, and one on the left leg. Usually, though, the LL electrode is not placed on the leg, but right beneath the heart.\u003c\/p\u003e\n\n\u003cp\u003eHere's a simple illustration:\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/electrode-placement.jpg\" src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/electrode-placement.jpg\"\u003e Electrode placement\u003c\/p\u003e\n\n\u003cp\u003ePlacing the right electrode at the right place is very important, therefore, the cables that come with the click are marked LA, RA and LL, so that our users don't misplace them.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/ek1-cable-v.png\" src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/ek1-cable-v.png\"\u003e ECG cables\u003c\/p\u003e\n\n\u003ch3\u003eAcquiring the data\u003c\/h3\u003e\n\n\u003cp\u003eOkay, so the click gives us the analog value of the electrical activity of the heart, what now? In order for us to have usable ECG data, we need two parameters: heart data and time.\u003c\/p\u003e\n\n\u003cp\u003eYes, time is always an important factor, especially in ECG. A person with 60 heart beats per minute is pretty much okay, but a person with 80 beats per minute has heart problems. Therefore, the MCU will gather ECG data, and also the time when that data is recorded. This way, we will have a time-based overview of the patient's heart beating.\u003c\/p\u003e\n\n\u003cp\u003eThe\u003cem\u003e\u003cstrong\u003e ECG Click Board™ \u003c\/strong\u003e\u003c\/em\u003ecan be bought along in a bundle with the electrodes and cables which connect them as an \u003ca data-mce-href=\"https:\/\/thedebugstore.com\/products\/ecg-click-bundle-mikroe-2458\" href=\"https:\/\/thedebugstore.com\/products\/ecg-click-bundle-mikroe-2458\" target=\"_blank\" title=\"ECG Click Board Bundle\"\u003eECG Click Board Bundle\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/ecg-bundle-v1.png\" src=\"https:\/\/cdn.mikroe.com\/blog\/2016\/10\/ecg-bundle-v1.png\"\u003e ECG bundle\u003c\/p\u003e\n\n\u003ch3\u003eCircuit design: amplifying and filtering the raw signal\u003c\/h3\u003e\n\n\u003cp\u003eBy the time it reaches skin surface, the electrical signal from the heart becomes faint. Only few miliVolts. This weak signal is also obstructed by muscle activity from the rest of the body.\u003c\/p\u003e\n\n\u003cp\u003eAnother source of noise is the electromagnetic interference from the environment (the body can act as an antenna).\u003c\/p\u003e\n\n\u003cp\u003eBut the pattern of a beating heart is fairly predictable. This allows us to design circuitry that properly amplifies and filters the electrical signal to get the desired output.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG Click Board™\u003c\/strong\u003e has a 7 block design. It comprises ESD, overvoltage and overcurrent protection (protecting both the hardware and the person), a pre-amplifier and amplifier, two high-pass filters, a low-pass filter, and a DRL circuit.\u003c\/p\u003e\n\n\u003cp\u003eLearn more about the hardware design from the docs.mikroe.com page.\u003c\/p\u003e\n\n\u003ch3\u003ePlot your heart beat\u003c\/h3\u003e\n\n\u003cp\u003eMikroPlot is a free data visualization tool (Windows) that can be used to generate an ECG.\u003c\/p\u003e\n\n\u003cp\u003eThe graph is generated from data sent from the MCU (ADC values from ECG click input + time stamp). A UART-USB connection is required.\u003c\/p\u003e\n\n\u003cp\u003eSee the learn.mikroe.com article for more information.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\n\u003cul\u003e\n    \u003cli\u003eMake a portable battery-powered holter with  \u003cstrong\u003eECG Click Board™\u003c\/strong\u003e, \u003ca data-mce-href=\"https:\/\/thedebugstore.com\/products\/microsd-click-board-mikroe-924\" href=\"https:\/\/thedebugstore.com\/products\/microsd-click-board-mikroe-924\" target=\"_blank\" title=\"microSD Click Board™\"\u003emicroSD Click Board™\u003c\/a\u003e and a \u003ca data-mce-href=\"https:\/\/thedebugstore.com\/pages\/search-results-page?q=clicker+2\" href=\"https:\/\/thedebugstore.com\/pages\/search-results-page?q=clicker+2\" target=\"_blank\" title=\"Clicker 2 Board\"\u003eClicker 2 Board\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eQuantified-self data logging: subtle variations in your heart-rate occur from second to second. With ECG click you are not limited to the doctor's office. Record ECG while you watch TV, read email, talk over the phone – study patterns to see what excites you (HRV - heart rate variability is a good indicator of state of mind).\u003c\/li\u003e\n    \u003cli\u003ePair ECG click with a wireless transceiver to transmit a heartbeat signal to various electronics (set a LED strip to pulsate in sync with your heartbeat, or the vibro motor on another person's Hexiwear).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\n\u003cul\u003e\n    \u003cli\u003e7-block design (protection, preamplifier, high-pass filter #1, amplifier, high-pass filter #2, low-pass filter, DRL circuit\u003c\/li\u003e\n    \u003cli\u003eReady-to-use example and free software tool to generate ECG plot\u003c\/li\u003e\n    \u003cli\u003eJumpers for setting output voltage range\u003c\/li\u003e\n    \u003cli\u003eTrimmer potentiometer to adjust gain\u003c\/li\u003e\n    \u003cli\u003eMCP609 OpAmp\u003c\/li\u003e\n    \u003cli\u003eMAX6106 Voltage Reference IC\u003c\/li\u003e\n    \u003cli\u003eESD, OverVoltage and OverCurrent protection\u003c\/li\u003e\n    \u003cli\u003eAnalog output (mikroBUS™ AN pin)\u003c\/li\u003e\n    \u003cli\u003e5V power supply\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768384348349,"sku":"MIKROE-2455","price":32.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ecg-click-board-23151462088893.jpg?v=1685005664"},{"product_id":"mikroe-2507-ecg-2-click-board-uk","title":"ECG 2 Click Board™","description":"\u003cp\u003eTrack the patterns of your beating heart with the \u003cstrong\u003eECG 2 Click Board™\u003c\/strong\u003e. The \u003cstrong\u003eECG 2 Click Board™\u003c\/strong\u003e contains ADS1194 16-bit delta-sigma analog-to-digital converters from Texas Instruments, a built-in programmable gain amplifier (PGA), an internal reference, and an onboard oscillator.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 2 Click Board™ \u003c\/strong\u003ecommunicates with the target MCU over SPI and the following mikroBUS pins: PWM, AN and INT. ECG 2 click runs on 3.3V and 5V power supply.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e We offer cables for three electrodes measuring (using 3.5mm jack onboard)\u003c\/p\u003e\n\n\u003ch3\u003eSetup Guide – How To Use The ECG 2 Click Board™\u003c\/h3\u003e\n\n\u003cp\u003eYou will need the following things to start recording your ECG:\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e1.\u003cstrong\u003eECG 2 Click Board™\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e2.Cable\u003c\/li\u003e\n    \u003cli\u003e3.Disposable adhesive electrode pads (sold in packs of 30)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOf course, you will also need a target board with an MCU (preferably powered from an external battery).\u003c\/p\u003e\n\n\u003cp\u003eThere are two available measuring options:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e1.\u003c\/strong\u003e For \u003cstrong\u003e3 wire measurement\u003c\/strong\u003e, a 3.5mm jack is used.\u003c\/p\u003e\n\n\u003cp\u003eYou can connect the click to a person using three electrodes placed on the left arm, right arm and the left side of the abdomen (below the heart) or alternatively on the left leg.\u003c\/p\u003e\n\n\u003cp\u003eWe offer cables and electrodes that are marked (left leg (LL) – red, left arm (LA) – black, right arm (RA) – white).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e2.\u003c\/strong\u003e For \u003cstrong\u003e4 wire measurement,\u003c\/strong\u003e screw terminals are used.\u003c\/p\u003e\n\n\u003cp\u003eECG 2 click can also be connected by 4 electrodes that are placed on both arms and legs.\u003c\/p\u003e\n\n\u003ch3\u003eMIKROPLOT APPLICATION\u003c\/h3\u003e\n\n\u003cp\u003eMikroPlot is a free data visualization tool (Windows) that can be used to generate an ECG.\u003c\/p\u003e\n\n\u003cp\u003eThe graph is generated from data sent from the MCU (ADC values from ECG click input + time stamp). A UART-USB connection is required.\u003c\/p\u003e\n\n\u003cp\u003eSee the learn.mikroe.com article for more information.\u003c\/p\u003e\n\n\u003ch3\u003ePOWER SUPPLY\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 2 Click Board™\u003c\/strong\u003e uses both 3.3V and 5V power supply — 3.3V is used as digital power supply and 5V is used for analog power supply (via linear regulator which gives stabilized 3V at output).\u003c\/p\u003e\n\n\u003ch3\u003eOVERVOLTAGE AND OVERCURRENT PROTECTION\u003c\/h3\u003e\n\n\u003cp\u003eOverVoltage and OverCurrent protection is realized over 22k resistors and diodes.\u003c\/p\u003e\n\n\u003ch3\u003eAPPLICATION\u003c\/h3\u003e\n\n\u003cp\u003eMeasures the electrical activity of a beating heart through electrodes taped to the skin.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eDISCLAIMER\u003c\/em\u003e\u003c\/strong\u003e: The \u003cstrong\u003eECG 2 Click Board™\u003c\/strong\u003e is a prototyping tool, not a medical-grade device. Do not use it to diagnose patients.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,ECG\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eMeasures the electrical activity of a beating heart through electrodes taped to the skin\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eADS1194 16-bit delta-sigma analog-to-digital converters\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eADS1194 IC, Onboard 3.5mm jack, Mikro Plot application, SPI interface, 3.3V and 5V power supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eGPIO,SPI\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eL (57.15 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V,5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eECG 2 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eTest Pace Out\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003ePAC\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003ePWD\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower Down\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSystem reset\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRESET\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eDRD\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eData Ready\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI chip select\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eCS\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI clock\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCLK\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI data out\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eDOUT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI data in\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eDIN\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768392048829,"sku":"MIKROE-2507","price":41.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ecg-2-click-board-30253370900669.jpg?v=1685004766"},{"product_id":"heart-rate-4-click-board-mikroe-2510-uk","title":"Heart Rate 4 Click Board™","description":"\u003cp\u003eThe\u003cstrong\u003e Heart Rate 4 Click Board™\u003c\/strong\u003e carries the MAX30101 high-sensitivity pulse oximeter and heart-rate sensor from Maxim Integrated. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target MCU over I2C interface, with additional functionality provided by INT pin on the mikroBUS™ line.\u003c\/p\u003e\n\n\u003ch3\u003eMAX30101 SENSOR FEATURES\u003c\/h3\u003e\n\n\u003cp\u003eThe MAX30101 is an integrated pulse oximetry and heart-rate monitor module. It includes internal LEDs, photodetectors, optical elements, and low-noise electronics with ambient light rejection.\u003c\/p\u003e\n\n\u003cp\u003eThe MAX30101 integrates red, green, and IR (infrared) LED drivers to modulate LED pulses for SpO2 and HR measurements. The LED current can be programmed from 0 to 50mA with proper supply voltage.\u003c\/p\u003e\n\n\u003cp\u003eThe device includes a proximity function to save power and reduce visible light emission when the user's finger is not on the sensor.\u003c\/p\u003e\n\n\u003cp\u003eThe MAX30101 has an on-chip temperature sensor for calibrating the temperature dependence of the SpO2 subsystem. The temperature sensor has an inherent resolution 0.0625°C.\u003c\/p\u003e\n\n\u003ch3\u003ePULSE OXIMETRY OR SPO2\u003c\/h3\u003e\n\n\u003cp\u003eOxygen-saturated blood absorbs light differently than unsaturated blood. Pulse oximeters measure the oxygen saturation in one's blood. Or to put it more precisely the percentage of hemoglobin molecules in blood that is saturated with oxygen.\u003c\/p\u003e\n\n\u003cp\u003eIn a healthy adult, this readings go from 94% to 100%.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Heart Rate 4 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eSince oxygen-saturated blood absorbs more infrared light than red light, and unsaturated blood absorbs more red light than infrared light, the SpO2 readings are calculated by the comparison of the amount of these two types of light.\u003c\/p\u003e\n\n\u003cp\u003eIt is best to use your finger for measurement.\u003c\/p\u003e\n\n\u003ch3\u003eTHE SAME SENSOR AS HEXIWEAR\u003c\/h3\u003e\n\n\u003cp\u003eDid you know that this click carries the same sensor as Hexiwear? \u003c\/p\u003e\n\n\u003cp\u003eWhen you place your wrist or fingertip over the slit on Hexiwear, the MAX30101 sensor measures the light absorbance of pulsing blood through a photodetector and derives heart-rate info. Current firmware version is able to show rough estimates.\u003c\/p\u003e\n\n\u003ch3\u003eMIKROPLOT\u003c\/h3\u003e\n\n\u003cp\u003eYou can use the MikroPlot visualization tool (Windows) to generate a graph from the data sent from the MCU.\u003c\/p\u003e\n\n\u003cp\u003eA UART-USB connection is required.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,Heart Rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003ewearable devices, fitness assistant devices, biomedical devices, etc.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMAX30101 high-sensitivity pulse oximeter and heart-rate sensor\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003ePulse oximetry or SpO2, low power consumption, programmable sample rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eGPIO,I2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on the \u003cstrong\u003eHeart Rate 4 Click Board™\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eINT1\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eActive-Low Interrupt (Open-Drain)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL1\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2C Clock Input\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA1\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock Data, Bidirectional (Open-Drain)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eJUMPERS AND SETTINGS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eDesignator\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault Position\u003c\/th\u003e\n            \u003cth\u003eDefault Option\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJ2A\u003c\/td\u003e\n            \u003ctd\u003eVLED\u003c\/td\u003e\n            \u003ctd\u003eLEFT\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003eWith this jumper we determine the LED diodes supplied with 3.3V or 5V.\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768392802493,"sku":"MIKROE-2510","price":22.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-4-click-board-30275135144125.jpg?v=1685195936"},{"product_id":"mikroe-2621-emg-click-board-uk","title":"EMG Click Board™","description":"\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eEMG Click Board™\u003c\/strong\u003e\u003c\/em\u003e measures the electrical activity produced by the skeletal muscles. It carries MCP609 operational amplifier and MAX6106 micropower voltage reference. EMG click is designed to run on a 5V power supply. The click board™ has an analog output (AN pin).\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\n\u003cimg alt=\"MikroE Sensors EMG click in position\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/shop.mikroe.com\/img\/cms\/inside-image-emg-click.jpg\" width=\"90%\"\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: The \u003cstrong\u003eEMG Click Board™\u003c\/strong\u003e is a prototyping tool, not a medical-grade device. Do not use it to diagnose patients.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Is EMG?\u003c\/h3\u003e\n\n\u003cp\u003eElectromyography or EMG is a \u003cstrong\u003ediagnostic technique for measuring the electrical activity of muscles\u003c\/strong\u003e. It is often used to diagnose the health of these muscles, and the neurons that control them. These neurons are called motor neurons. They transmit electrical signals, and the muscles contract when this happens.\u003c\/p\u003e\n\n\u003cp\u003eAn EMG collects these signals and translates them into a graphical representation.\u003cbr\u003e\n\u003cimg alt=\"EMG collects these signals and translates them into a graphical representation\" data-entity-type=\"\" data-entity-uuid=\"\" height=\"305\" src=\"https:\/\/shop.mikroe.com\/img\/cms\/graph.jpg\" width=\"563\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003eHOW EMG CLICK WORKS\u003c\/h3\u003e\n\n\u003cp\u003eThe onboard 3.5mm audio jack is used to connect cables\/electrodes to the \u003cstrong\u003eEMG Click Board™\u003c\/strong\u003e. The electrode collects voltage from the skin (few millivolts). And the signal from the jack is amplified and filtered. Therefore, the \u003cstrong\u003eEMG Click Board™\u003c\/strong\u003e can be divided into seven blocks.\u003cbr\u003e\n\u003cimg alt=\"MikroE Sensors EMG click diagram\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/shop.mikroe.com\/img\/cms\/inside-text-image-diagram.jpg\" width=\"97%\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSETUP GUIDE\u003c\/h3\u003e\n\n\u003cp\u003eTo record an EMG, you will need the following things:\u003c\/p\u003e\n\n\u003col\u003e\n    \u003cli\u003e\u003cstrong\u003eEMG Click Board™\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003eECG\/EMG cable\u003c\/li\u003e\n    \u003cli\u003eDisposable adhesive pads (sold in packs of 30)\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eIf you are starting out, the best offer is the \u003cstrong\u003eEMG click bundle\u003c\/strong\u003e that contains all three.\u003cbr\u003e\n\u003cbr\u003e\nOf course, you will also need a target board with an MCU with at least a 10-bit ADC (preferably powered from an external battery). Sampling rate should be at least 256Hz.\u003cbr\u003e\n\u003cbr\u003e\nThe electrodes are connected to the board with a cable that plugs into the onboard 3.5mm phone jack.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"MikroE Sensors EMG click setup\" data-entity-type=\"\" data-entity-uuid=\"\" height=\"300\" src=\"https:\/\/shop.mikroe.com\/img\/cms\/emg-click-setup_1.png\" width=\"600\"\u003e\u003cbr\u003e\n\u003cbr\u003e\nFor optimal results place the first DRL electrode on the wrist of the hand. Place the second and third electrode on the muscle you want to measure. See the image above.\u003c\/p\u003e\n\n\u003ch3\u003eMIKROPLOT APPLICATION\u003c\/h3\u003e\n\n\u003cp\u003eMikroPlot is a free data visualization tool (Windows) that can be used to generate an EMG graph. It's a simple tool to help you visualize sensor data recorded over time.\u003c\/p\u003e\n\n\u003cp\u003eThe graph is generated from data sent from the microcontroller. A UART-USB connection is required.\u003c\/p\u003e\n\n\u003ch3\u003eMCP609 FEATURES\u003c\/h3\u003e\n\n\u003cp\u003eThe MCP606\/7\/8\/9 family of operational amplifiers (op amps) from Microchip Technology Inc. are unity-gain stable with low offset voltage (250 µV, maximum). Performance characteristics include rail-to-rail output swing capability and low input bias current (80 pA at +85°C, maximum).\u003c\/p\u003e\n\n\u003ch3\u003eMAX6106 FEATURES\u003c\/h3\u003e\n\n\u003cp\u003eThe MAX6106 is a low-cost, low-dropout (LDO), micropower voltage reference. This three-terminal reference is available with output voltage options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V, 4.5V, and 5V. For this click, we used the 2.048V.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eMeasuring the electrical activity produced by skeletal muscles.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMAX6106 voltage reference, 3.5mm audio jack\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eESD protection, Overvoltage protection, High-pass filter\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eAnalog\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eL (57.15 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eEMG Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eAnalog output\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eAN\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eJUMPERS AND SETTINGS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eDesignator\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault Position\u003c\/th\u003e\n            \u003cth\u003eDefault Option\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eADC ref.\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003e2.048\u003c\/td\u003e\n            \u003ctd\u003eOutput voltage range, left position 0-2.048V, right position 0-4.096V.\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThere is one SMD (0805) jumper that determines the output voltage range. When you connect all three electrodes to each other, the output should be constant voltage (1.024V or 2.048V depending on the jumper position). That constant voltage is zero-voltage on graphic, so the positive part of EMG waveform will go above zero and negative part of the EMG waveform will go below zero. There is also trimmer potentiometer which adjust the gain. So, if we set jumper to 2.048 position (zero is now 1.024V) that means that the gain should be set so that the EMG waveform is in the range of 0-2.048V. If we set jumper to 4.096 position (zero is now 2.048V) gain should be set so that the EMG waveform is in the range of 0-4.096V. So, jumper and trimmer potentiometer are used to make output voltage level from EMG click accommodate to the input voltage level of ADC which will be used.\u003c\/p\u003e\n\n\u003ch3\u003eLEDS AND BUTTONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eDesignator\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eType\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003eLED\u003c\/td\u003e\n            \u003ctd\u003ePower Supply Indication LED\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHOW IT WORKS\u003c\/h3\u003e\n\n\u003col\u003e\n    \u003cli\u003eThe onboard 3.5mm audio jack is used to connect cables\/electrodes to the click board. The electrode collects voltage from the skin (few millivolts). And the signal from the jack is amplified and filtered. Therefore, EMG click can be divided into seven blocks.\u003c\/li\u003e\n    \u003cli\u003eProtection - Provides ESD protection (protects click), Overvoltage protection (protects respondents) and Overcurrent protection (protects respondents). In addition to protection, input block has the role of filter that prevents radio waves to \"enter\" the preamplifier.\u003c\/li\u003e\n    \u003cli\u003ePreamplifier – Is implemented through three operational amplifiers configured as instrumentation amplifier (IA – amplifies the voltage difference between \"+\" and \"-\" electrode) which at its output provides single-end signal.\u003c\/li\u003e\n    \u003cli\u003eHigh-Pass filter – Should eliminate the DC component of the signal (f_c=1.6Hz). It is passive RC filter (first order).\u003c\/li\u003e\n    \u003cli\u003eAmplifier – Need to provide additional amplification that can be adjusted using trimmer potentiometer VR1 so the analog output could accommodate to the input voltage range of ADC. The amplifier is implemented using operational amplifier configured as non-inverting amplifier.\u003c\/li\u003e\n    \u003cli\u003eHigh-Pass filter – Should eliminate the DC component of the signal (f_c=0.16Hz) this time after the amplifier. It is also passive RC filter (first order).\u003c\/li\u003e\n    \u003cli\u003eLow-Pass filter – Should limit frequency range to 60Hz. It is third order active filter with gain of 15 (second-order Sallen-Key filter topology + passive RC filter first order = third order filter).\u003c\/li\u003e\n    \u003cli\u003eDRL circuit (Driven Right Leg) – is an electronic circuit that is often added to biological signal amplifiers to reduce Common-mode interference. Biological signal amplifiers such as ECG (Electrocardiogram), EEG (Electroencephalogram) or EMG circuits measure very small electrical signals emitted by the body, often as small as several microvolts (millionths of a volt). Unfortunately, the patient's body can also act as an antenna which picks up electromagnetic interference, especially 50\/60 Hz noise from electrical power lines. This interference can obscure the biological signals, making them very hard to measure. Right Leg Driver circuitry is used to eliminate interference noise by actively cancelling the interference. That is selective amplifier stage that shifts phase of signal for 180° (inverting) and returns it to respondents in order to cancel.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e\n\n\u003csection id=\"info-description\"\u003e \u003c\/section\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768393621693,"sku":"MIKROE-2621","price":24.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-emg-click-board-30252761874621.jpg?v=1685220588"},{"product_id":"mikroe-2860-gsr-click-board-uk","title":"GSR Click Board™","description":"\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eGSR Click Board™\u003c\/strong\u003e\u003c\/em\u003e can be used to measure the human body's electrodermal activity (EDA), also known as the galvanic skin response (GSR). EDA is the property of the human body that causes continuous variation in the electrical characteristics of the skin. EDA monitoring is usually combined with the monitoring of the heart rate, respiratory rate, and blood pressure, giving a complete insight into some of the parameters of the autonomous nervous systems of the human body.\u003c\/p\u003e\n\n\u003cp\u003eEDA measurement is a component of modern polygraph devices, often used as lie detectors. Recent research reveals there is more to EDA than it seems, so the studies continue in that direction. The \u003cstrong\u003eGSR Click Board™\u003c\/strong\u003e is ideally suited to be used as a research and experimenting tool and for building helpful test applications based on the EDA response - such as the polygraphs.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The GSR Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eEDA is a standard measure of autonomic nervous system activity. Skin conductance is not under conscious control, it is autonomously controlled by the sympathetic activity and cognitive and emotional states subconsciously. Therefore, the skin's electric resistance offers direct insights into autonomous emotional regulation.\u003c\/p\u003e\n\n\u003cp\u003eThe working principle of the \u003cstrong\u003eGSR Click Board™\u003c\/strong\u003e is based on the voltage divider, composed of two resistors. One resistor is a fixed resistor 100kΩ (R4), and the second is the human skin, acting as the variable resistor. DC Voltage is applied to the skin via one electrode connected to the 3.3V rail. The other electrode closes the electrical circuit through the skin and back to the Click Board™ board. The voltage at the voltage divider will vary depending on the skin's resistance.\u003cbr\u003e\n\u003cbr\u003e\n\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/cms\/gsr-clik-inside-image-a.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGSR Click Board™\u003c\/strong\u003e uses the MCP607, a dual CMOS low-noise OPAMP made by Microchip, and the MCP3201, a 12bit SAR type ADC, made by the same company. The input stage consists of the aforementioned voltage divider and a frequency limiting capacitor. This signal is then fed to the first half of the OPAMP, set to a unity gain. It is used to condition the signal before entering the ADC.\u003c\/p\u003e\n\n\u003cp\u003eThe onboard ADC IC uses the SPI for communication with the MCU. The SPI interface pins are routed to the appropriate mikroBUS™ pins. MCP3201 ADC also needs a clean and stable reference voltage, which is provided by the MCP1541, a small, 3-pin specialised reference voltage IC, from Microchip. The 5V rail is routed to the voltage reference input and the VCC pin of the ADC IC and the OPAMP IC. This means that the Click Board™ board™ needs both 3.3V and 5V for a proper operation.\u003c\/p\u003e\n\n\u003cp\u003eThe other half of the OPAMP is used as the input buffer for the measured signal, and its output is routed to the AN pin of the mikroBUS™. This signal is analogue and can be used for either more accurate sampling or for applying some other type of measured signal processing.\u003c\/p\u003e\n\n\u003cp\u003eGSR Click Board™ has an onboard 3.5 mm jack, used to securely connect the electrodes to the board.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe GSR Click Board™ can be used for measurement of the EDA factor of the human body, allowing insight in some of the human autonomic nervous system parameters.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMCP607 2.5V to 6.0V Micropower CMOS Op Amp, MCP3201 2.7V 12-Bit A\/D Converter with SPI Serial Interface, MCP1541 2.5V, and 4.096V Voltage References\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eThe Click Board™ features a precise 12bit AD converter so that the measured data can be digitally processed by the MCU via the SPI, it also outputs a buffered analogue signal for further processing (analogue or digital)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eAnalog, SPI\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V,5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eGSR Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eAnalog\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eAN\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eChip Select\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eCS\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI Clock\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCK\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI Data Output\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDO\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+3V3\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCN1\u003c\/td\u003e\n            \u003ctd\u003eCN1\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e3.5mm jack\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768411906237,"sku":"MIKROE-2860","price":20.3,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-gsr-click-board-30250910515389.jpg?v=1685011790"},{"product_id":"heart-rate-7-click-board-mikroe-2998-uk","title":"Heart Rate 7 Click Board™","description":"\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eHeart Rate 7 Click Board™\u003c\/strong\u003e\u003c\/em\u003e is an optical biosensor Click board™ which can be used for heart-rate monitoring (HRM). The \u003cstrong\u003eHeart Rate 7 Click Board™\u003c\/strong\u003e employs a very sensitive analog front-end IC with high dynamic range, which ensures accurate and reliable readings. This analog front-end IC is coupled with the optical front end, which consists of a sensitive photo-diode (PD) and two high brightness green LEDs. The photo-diode is the most sensitive to a visible light spectrum, offering reasonably high current output compared to other, standard type PD elements used so far, thus providing very accurate HRM readings.\u003c\/p\u003e\n\n\u003cp\u003eThe analog front-end IC features a trans-impedance amplifier circuitry with programmable gain, which conditions the PD current output, providing linear voltage changes, suitable for sampling by the 22bit ADC. It also provides individual DC offset subtraction for the LED and ambient light phases, as well as the ambient light influence cancellation at the ADC output. The signal path within the IC is kept differential, ensuring the lowest possible amount of interferences and noise. These features allow Heart Rate 7 to achieve reliable and accurate readings. It can be used to develop applications based on the heart rate monitoring, calorie expenditure, and similar health-related applications.\u003c\/p\u003e\n\n\u003ch3\u003eHEART RATE MONITORING OR HRM\u003c\/h3\u003e\n\n\u003cp\u003eWhile the blood passes through the capillary blood vessels, they expand and dilate. Their light reflectance index changes accordingly. This is the basis of the photo-plethysmogram (PPM), a method used for the volumetric measurement of an organ, or in this case - blood vessels. The heart rate signal is calculated according to the current changes in transmission and reflection of the green light, sensed by the PD element. The Heart Rate 7 click can provide the HRM readings, by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Heart Rate 7 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHeart Rate 7 Click Board™\u003c\/strong\u003e consists of an analog front end and the optical front end. The main task of the analog front-end IC is to drive LEDs and condition the signal received by the photo-diode (PD), by eliminating the background noise and ambient light influence. Besides that, it also provides conversion of the measurement into a digital information which can be used by an MCU. For the conversion to be accurate, the analog front-end device must not introduce any artifacts into the readings. \u003cimg alt=\"Heart rate 7 click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-7-click-inner-img.jpg\" src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-7-click-inner-img.jpg\"\u003e\u003cbr\u003e\nTo achieve accurate measurements, Heart Rate 7 click employs AFE4404, an integrated analog front end (AFE) device, used for optical heart-rate monitoring and bio-sensing, from Texas Instruments. This IC supports up to three switching LEDs and a single PD element. The current from the PD element is converted to a linear voltage by the means of the integrated trans-impedance amplifier section (TIA) with a programmable gain so that it can be sampled by the AD section, which features a 22bit ADC converter. The signal chain is kept fully differential throughout the receiver channel, in order to achieve good rejection of common-mode noise, as well as the noise from the power supply. The AFE IC uses the I2C communication, with its pins routed to the corresponding mikroBUS™ I2C pins.\u003cbr\u003e\n\u003cbr\u003e\nAs the optical front end, the \u003cstrong\u003eHeart Rate 7 Click Board™\u003c\/strong\u003e uses the VEMD8080 photo-sensor from Vishay, which is a high-speed PD element, with enhanced sensitivity in the visible light spectrum. The Click board™ also uses two VLMTG1400, high-brightness true-green LEDs from Vishay, specially designed for the HRM measurement applications, offering a narrow band of green light wavelength.\u003c\/p\u003e\n\n\u003cp\u003eThe analog front end IC works with the periodically repeated operations (a pulse repetition frequency or PRF). There are four sampling phases per cycle. The four different readings are stored in separate 24bit output registers. There are also four filters on the TIA output, which are used to allow pulses from the PD to pass through the ADC, isolating the time when the emitting LEDs are ON, switching to the different filter in every sampling phase. The sampling phases are determined by the LED modes: two LED mode or three LED mode. This affects which LEDs are pulsed during the corresponding sampling cycles – LED1 and LED2, or LED 1, LED 2 and LED 3. However, the Heart Rate 7 click features only 2 LEDs, so the three LED mode should not be used.\u003c\/p\u003e\n\n\u003cp\u003eThe analog front end AFE4404 IC also incorporates a DAC, used to cancel the DC offset from the PD. When the TIA gain is set to a high value, it will amplify the DC component of the PD signal, too. To allow proper ADC conversion, this DC component needs to be removed from the signal path, so the DAC which sources current in the opposite direction with respect to the existing DC offset is employed at the input stage. This allows for higher amplification of the signal from the PD, and thus more useful (AC) signal detection sensitivity.\u003c\/p\u003e\n\n\u003cp\u003eLED drivers allow 6 bit of LED current control for each channel, individually. This allows 63 steps between 0 and 50mA. This range can be doubled to 100mA. The LED driver supply voltage can be set by the onboard SMD jumper, labeled as the LED SUP. It offers a selection between 3.3V and 5V. The ADC_RDY pin provides an interrupt to the host MCU, saving it from having to constantly poll the sensor for data. This pin is set to a HIGH logic level when the PRF cycle ends, allowing four output data registers to be read. The PRF can vary between 10 up to 1000 samples per second. This pin is routed to the INT pin of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eThe AFE4404 IC can be clocked both internally and externally. For a precise and synchronized measurement, It is advised to drive the Heart Rate 7 click by the same clock as the host MCU. The input clock can go up to 60MHz, but the internal divider of the IC has to be set so that the clock stays within the range from 4MHz to 6MHz. When driven by the internal clock, the device runs at 4MHz. By default, the external clock input is selected. The clock signal can be introduced via the PWM pin of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eAfter the power-on, the AFE IC requires a reset. The RESETZ pin of this IC is routed to the RST pin of the mikroBUS™, allowing it to be reset by the host MCU. Pulling this signal to a LOW logic level of about 25 µs to 50 µs will cause a reset of the device. If this pin is pulled for more than 200 µs, it will put the device into the Power Down mode. The device can also be reset by setting a bit in the appropriate register, via the I2C. This pin is pulled to a HIGH logic level by the onboard pull-up resistor.\u003c\/p\u003e\n\n\u003cp\u003eMore information about the registers and how to set them can be found in the AFE4404 IC datasheet. However, included library contains functions that allow easy configuration and use of the \u003cstrong\u003eHeart Rate 7 Click Board™\u003c\/strong\u003e. The included example (demo) application demonstrates their functionality and can be used as a reference for a custom design.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,Heart Rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eHeart Rate 7 Click Board™ can\u003c\/strong\u003e be used to develop applications based on the heart rate monitoring, calorie expenditure, and similar health-related applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eAFE4404, an integrated AFE for optical heart-rate monitoring and bio-sensing, from Texas Instruments; VEMD8080 high-speed photosensor, from Vishay; VLMTG1400, high-brightness true-green LED from Vishay\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eHigh dynamic sensitivity, 3 integrated LED drivers with independently programmable currents, ambient light and DC offset cancellation, internal\/external clock source, top-of-the-class LED and PD optical front-end from Vishay\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C,PWM\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on the\u003cstrong\u003e\u003cem\u003e \u003c\/em\u003eHeart Rate 7 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eCLK\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eExternal clock input\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eReset\/Power-down\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRST\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eADC_RDY\/Interrupt\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003e Description\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eLED SUP\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eLED driver voltage selection: left position 3.3V, right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768416264381,"sku":"MIKROE-2998","price":19.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-7-click-board-30247620673725.jpg?v=1685222756"},{"product_id":"mikroe-3012-heart-rate-5-click-board","title":"Heart Rate 5 Click Board™","description":"\u003cp\u003e\u003ciframe allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" frameborder=\"0\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/t8I3_V5xMrg\" title=\"YouTube video player\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eHeart Rate 5 Click Board™\u003c\/strong\u003e\u003c\/em\u003e is the optical biosensor board which can be used for the heart-rate monitoring (HRM), as well as the peripheral capillary oxygen saturation monitoring (SpO2). The \u003cstrong\u003eHeart Rate 5 Click Board™\u003c\/strong\u003e employs a very sensitive analog front-end IC with high dynamic range, which ensures accurate and reliable readings. This analog front-end IC is coupled with the optical front end, which consists of the top-of-the-class integrated BIOFY® sensor, which features two green LEDs, one red LED, one infrared LED, and two photodiodes (PD), offering very accurate HRM and SpO2 readings.\u003c\/p\u003e\n\n\u003cp\u003eThe analog front-end IC features a trans-impedance amplifier circuitry with programmable gain, which provides linear voltage changes for the 22bit ADC. It also provides individual DC offset subtraction for the LED and ambient light phases, as well as the ambient light influence cancellation at the ADC output. The signal path within the IC is kept differential, ensuring the lowest possible amount of interferences and noise. These features allow Heart Rate 5 to achieve reliable and accurate readings. It can be used to develop applications based on the heart rate monitoring, pulse oximetry measurements, calorie expenditure, and similar health-related applications.\u003c\/p\u003e\n\n\u003ch3\u003ePULSE OXIMETRY OR SPO2\u003c\/h3\u003e\n\n\u003cp\u003eOxygen saturation in the blood can be determined by measuring the light absorption in the red\/IR part of the spectrum. The oxygen saturated blood absorbs more red light and less infrared than the unsaturated blood. This fact can be used to determine the oxygen saturation of the blood. For a healthy adult person, the peripheral capillary oxygen saturation (SpO2) percentage ranges from 95% to 100%. the \u003cstrong\u003eHeart Rate 5 Click Board™\u003c\/strong\u003e can provide the SpO2 measurement, by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003ch3\u003eHEART RATE MONITORING OR HRM\u003c\/h3\u003e\n\n\u003cp\u003eWhile the blood passes through the capillary blood vessels, they expand and dilate. Their light reflectance index changes accordingly. This is the basis of the photoplethysmogram (PPM), a method used for the volumetric measurement of an organ, or in this case - blood vessels. The heart rate signal is calculated according to the current changes in transmission and reflection of the green light, sensed by the PD element. The Heart Rate 5 click can provide the HRM readings, by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Heart Rate 5 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHeart Rate 5 Click Board™\u003c\/strong\u003e consists of an analog front end and the optical front end. The main task of the analog front-end IC is to drive LEDs and condition the signal received by the photodiode (PD), by eliminating the background noise and ambient light influence on the measurement. Besides that, it also provides conversion of the measurement into a digital information, which can be used by the MCU. For the conversion to be accurate, the analog front-end device must not introduce any artifacts into the readings.\u003cbr\u003e\n\u003cimg alt=\"Heart rate 5 click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-5-click-inside-image-a.jpg\" src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-5-click-inside-image-a.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eTo achieve accurate measurements, Heart Rate 5 click employs AFE4404, an integrated analog front end (AFE) device, used for optical heart-rate monitoring and bio-sensing, from Texas Instruments. This IC supports up to three switching LEDs and a single PD element. The current from the PD element is converted to a linear voltage by the means of the integrated trans-impedance amplifier section (TIA) with a programmable gain so that it can be sampled by the AD section, which features a 22bit ADC converter. The signal chain is kept fully differential throughout the receiver channel, in order to achieve good rejection of common-mode noise, as well as the noise from the power supply. The AFE IC uses the I2C communication, with its pins routed to the corresponding mikroBUS™ I2C pins.\u003c\/p\u003e\n\n\u003cp\u003eAs the optical front end, Heart Rate 5 click uses the top-of-the-class integrated BIOFY® SFH 7072 sensor, from OSRAM, which features two green LEDs, one red LED, one infrared LED, and two PDs, of which one is a broadband PD used for the HRM, while the other is the IR band cut PD, used for the SpO2 readings. These LEDs are specially designed for the HRM and SpO2 measurement applications, offering a set of calibrated wavelengths for both light-emitting diodes (LED) and photo-sensing diodes (PD). Since the SF7072 sensor offers more elements than the ALS can support, the choice is made by flipping the onboard SMD switch labeled as MODE SEL: the choice can be made between the broadband PD for the HRM readings and the IR band PD for SnO2 readings. Both poles of the switch SW1 need to stay in the same position (both to the left, or both to the right), as they are routed to each end of the respective PD element.\u003c\/p\u003e\n\n\u003cp\u003eThe analog front end works with the periodically repeated operations (a pulse repetition frequency or PRF). There are four sampling phases per cycle. The four different readings are stored in separate 24bit output registers. There are also four filters on the TIA output, which are used to allow pulses from the PD to pass through the ADC, isolating the time when the emitting LEDs are ON, switching to the different filter in every sampling phase. The sampling phases are determined by the LED modes: two LED mode or three LED mode. This affects which LEDs are pulsed during the corresponding sampling cycles – LED1 and LED2, or LED 1, LED 2 and LED 3.\u003c\/p\u003e\n\n\u003cp\u003eThe AFE4404 IC also incorporates a DAC, used to cancel the DC offset from the PD. When the TIA gain is set to a high value, it will amplify the DC component of the PD signal. To allow ADC conversion, this component needs to be removed from the signal path, so the DAC with the opposite current direction is introduced at the input stage, based on the existing DC offset. This allows for higher amplification of the signal from the PD, and thus, more useful AC signal detection sensitivity.\u003c\/p\u003e\n\n\u003cp\u003eThe LED drivers allow 6 bit of LED current control for each channel individually. This allows 63 steps between 0 and 50mA. This range can be doubled to 100mA. The LED driver voltage can be set by the onboard SMD jumper, labeled as the LED SUP. It offers a selection between 3.3V and 5V. The ADC_RDY pin provides an interrupt to the host MCU, saving it from having to constantly poll the sensor for data. This pin is set to a HIGH logic level when the PRF cycle ends, allowing four output data registers to be read. The PRF can vary between 10 to 1000 samples per second. This pin is routed to the INT pin of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eThe AFE4404 IC can be clocked both internally and externally. For precise and synchronized measurement, It is advised to drive the Heart Rate 5 click by the same clock as the host MCU. The input clock can go up to 60MHz, but the internal divider of the IC has to be set so that the clock stays within the range from 4MHz to 6MHz. When driven by the internal clock, the device runs at 4MHz. By default, the external clock input is selected. The clock signal can be introduced via the PWM pin of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eAfter the power-on, the AFE IC requires a reset. The RESETZ pin of this IC is routed to the RST pin of the mikroBUS™, allowing it to be reset by the host MCU. Pulling this signal to a LOW logic level for about 25 µs to 50 µs will cause a reset of the device. If this pin is pulled for more than 200 µs, it will put the device into the POWER DOWN mode. The device can also be reset by setting a bit in the appropriate register, via the I2C. This pin is pulled to a HIGH logic level by the onboard pull-up resistor.\u003c\/p\u003e\n\n\u003cp\u003eMore information about the registers and how to set them can be found in the AFE4404 IC datasheet. However, included library contains functions that allow easy configuration and use of the \u003cstrong\u003eHeart Rate 5 Click Board™\u003c\/strong\u003e. The included exemplary (demo) application demonstrates their functionality and can be used as a reference for a custom design.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,Heart Rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eIt can be used to develop applications based on the heart rate monitoring, pulse oximetry measurements, calorie expenditure, and similar health-related applications.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eAFE4404, a compact integrated analog front end (AFE) device for optical heart-rate monitoring and bio-sensing, from Texas Instruments; BIOFY® SF7072 integrated LED and PD optical front end, from OSRAM.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eHigh dynamic sensitivity, three integrated LED drivers with independently programmable currents, ambient light and DC offset cancellation, internal\/external clock source, top-of-the-class integrated LED and PD optical calibrated front-end from OSRAM.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C,PWM\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on \u003cstrong\u003e the Heart Rate 5 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eCLK\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eExternal clock input\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eReset\/Power-down\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRST\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eADC_RDY\/Interrupt\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e+5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003e Description\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eLED SUP\u003c\/td\u003e\n            \u003ctd\u003eRight\u003c\/td\u003e\n            \u003ctd\u003eLED driver voltage selection: left position 3.3V, right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSW1\u003c\/td\u003e\n            \u003ctd\u003eMODE SEL\u003c\/td\u003e\n            \u003ctd\u003eRight\u003c\/td\u003e\n            \u003ctd\u003ePhoto-diode type selection (anode): left position HRM (P), right position SpO2 (O)\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768416362685,"sku":"MIKROE-3012","price":26.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-5-click-board-30247696597181.jpg?v=1685027270"},{"product_id":"mikroe-3102-oximeter-click-board-uk","title":"Oximeter Click Board™","description":"\u003cp\u003eFeaturing highly adaptable programmable AFE IC, the \u003cem\u003e\u003cstrong\u003eOximeter Click Board™\u003c\/strong\u003e\u003c\/em\u003e can be used in a really wide range of different applications. It allows development of oximetry algorithms, development of heart rate measurement applications, even building of ambient light projects. Offering expandability with external LED and PD elements, this Click board™ can be used in virtually any photometric application.\u003c\/p\u003e\n\n\u003ch2\u003ePulse Oximetry or SPO2\u003c\/h2\u003e\n\n\u003cp\u003eOxygen saturation in the blood can be determined by measuring the light absorption in the red\/IR part of the spectrum. The oxygen saturated blood absorbs more red light and less infrared, than the unsaturated blood. This fact can be used to determine the oxygen saturation of the blood. For a healthy adult person, the peripheral capillary oxygen saturation (SpO2) percentage ranges from 95% to 100%. Oximeter click can provide the SpO2 measurement, by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003ch2\u003eHow Does The Oximeter Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe main component of the \u003cstrong\u003eOximeter Click Board™\u003c\/strong\u003e is the ADPD105, a highly configurable photometric front end (AFE) device from Analog Devices. This IC has three current sinks LED drivers with the common cathode and four AFE input channels to which the photodiode (PD) elements can be connected. The IC actually has eight PD inputs, which can be routed to AFE input channels, depending on needs. There are three possible PD configuration settings, programmable via the I2C interface. Oximeter click uses two LEDs, well suited for measuring the oxygen saturation in the blood: a red color LED and an infrared LED. Also, a single PD element is used to sense the reflected light. However, this click offers headers on its sides, which allow connecting of additional LED\/PD elements, expanding the usability of the Click board™. Jumpers labelled as J1 to J3 are used to completely disconnect the onboard photo elements, freeing these lines to be used with the external photo elements.\u003cbr\u003e\n\u003cbr\u003e\n\u003cimg alt=\"Oximeter click\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/cms\/oximeter-click-inside-image-a.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe current from PDs passes through the analog block. The analog block itself contains four AFE signal conditioning sections, which process the input current by using trans-impedance amplifiers (TIA) with programmable gain, bandpass filters, and integrators, reducing the influence of external factors - such as the ambient light and similar. The analog block is coupled with the 14-bit ADC, and finally - a digital data path and control block used to manage all the internal routing and provide data on the I2C interface.\u003c\/p\u003e\n\n\u003cp\u003eThe main working principle of this device is based on driving LED elements and measuring the response via the photosensors. There are two time-slots that are consecutively executed, each with its own path that uses independent settings for LED driving, AFE setup, and data collection. During each time-slot period, the configured LEDs (or a LED) are pulsed with programmable magnitude, duration and number of pulses. The PD sensing intervals coincidence with the LED pulses, rejecting ambient light and other external influences that way. Each LED pulse response is converted by the 14-bit ADC, and integrated by the AFE integrator block. Up to 255 pulse responses can be integrated during one sampling period, providing up to a 20-bit maximum range.\u003c\/p\u003e\n\n\u003cp\u003eAn important thing when performing the measurement is to offset the AFE integration the right way: if the AFE integration window is not offset correctly, or its size is too small or too large, either the LED pulse will be skipped completely, or too much noise will affect the integration. Ideally, a LED pulse should be captured by the AFE integration window that matches its position and size. Datasheet of the ADPD105 device describes methods of how to set the AFE integration window correctly, especially when used with custom LEDs and PDs.\u003c\/p\u003e\n\n\u003cp\u003eThe time-slot feature, and using two different LED\/PD settings are utilized on the Click board™ to provide two different measurements in a sequence - one for the red LED, one for the IR LED. By comparing these two measurements, it is possible to determine blood oxygen saturation.\u003c\/p\u003e\n\n\u003cp\u003eAfter the measurement is completed, the data is available either in the register directly, or it is stored on the 128-byte FIFO memory buffer. The interrupt event can be used to alert the host MCU when the FIFO buffer exceeds the programmed threshold. Both time slots are able to store their data on the FIFO buffer.\u003c\/p\u003e\n\n\u003cp\u003eTwo GPIO (I\/O) pins can be configured in a number of different ways: they can be set as interrupts, with programmable polarity, driving mode (open-drain, push-pull), and functionality. They can serve as interrupt outputs, or alternatively, they can be set to output 32kHz clock, to accept external clock, sampling synchronization pulses, etc. These pins perfectly fit in the programmable concept of the ADPD105 IC itself, offering the extended functionality of the Click board™. IO0 and IO1 pins are routed to the PWM pin of the mikroBUS™ and to the INT pin of the mikroBUS™, respectively.\u003c\/p\u003e\n\n\u003cp\u003eAlready low power consumption can be further reduced by disabling all the unused channels. This will free the resources, and reduce power consumption. The IC requires 1.8V in order to work properly. Therefore, a small regulating LDO is used, providing 1.8V out of 3.3V mikroBUS™ rail.\u003c\/p\u003e\n\n\u003cp\u003eMore information about the registers and how to set them can be found in the ADPD105 IC datasheet. However, included library contains functions that allow easy configuration and use of the \u003cstrong\u003eOximeter Click Board™\u003c\/strong\u003e. The included exemplary (demo) application demonstrates their functionality and can be used as a reference for a custom design.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eOximeter Click Board™\u003c\/strong\u003e can be used for development of oximetry algorithms, heart rate measurement applications, ambient light applications... Offering expandability with external LED and PD elements, this Click board™ can be used in virtually any photometric application.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eADPD105, a highly configurable photometric front end (AFE) device from Analog Devices\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eHighly programmable photometric AFE device from Analog Devices, external headers for additional photo elements, onboard LEDs and photodiode optimized for the oximetry measurements\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eOximeter Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eIO0\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\/GPIO 0\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eIO1\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\/GPIO 1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nONBOARD JUMPERS AND SETTINGS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJ1\u003c\/td\u003e\n            \u003ctd\u003eJ1\u003c\/td\u003e\n            \u003ctd\u003ePopulated\u003c\/td\u003e\n            \u003ctd\u003ePD1 onboard photodiode enable: populated - PD enabled, unpopulated - PD disabled\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJ2\u003c\/td\u003e\n            \u003ctd\u003eJ2\u003c\/td\u003e\n            \u003ctd\u003ePopulated\u003c\/td\u003e\n            \u003ctd\u003eLEDX2 onboard IR LED enable: populated - LED connected, unpopulated - LED disconnected\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJ3\u003c\/td\u003e\n            \u003ctd\u003eJ3\u003c\/td\u003e\n            \u003ctd\u003ePopulated\u003c\/td\u003e\n            \u003ctd\u003eLEDX1 onboard red LED enable: populated - LED connected, unpopulated - LED disconnected\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJ4\u003c\/td\u003e\n            \u003ctd\u003eJ4\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eExternal photo elements connection header 1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJ5\u003c\/td\u003e\n            \u003ctd\u003eJ5\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eExternal photo elements connection header 2\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eNote: when using external photo elements on lines LEDX1, LEDX2, and PD1, it is necessary to remove the respective jumpers (J1 - J3)\u003c\/p\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768418427069,"sku":"MIKROE-3102","price":32.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-oximeter-click-board-30240203636925.jpg?v=1685214287"},{"product_id":"mikroe-3427-ecg-4-click-board-uk","title":"ECG 4 Click Board™","description":"\u003cp\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: \u003cem\u003e\u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e\u003c\/em\u003e is a development and prototyping tool. It is not intended to be used for medical treatment of patients and should not be used to diagnose or treat any conditions.\u003c\/p\u003e\n\n\u003cp\u003eThe BMD101 SoC integrates all the necessary components, so there are very few external parts required. An analog front-end section of the BMD101 SoC features an HP filter, a 16-bit A\/D converter, and a low-noise amplifier (LNA), allowing it to properly sample bio-signals, which are in magnitudes of µV. The raw data is further processed by powerful filtering DSPs, allowing clean and accurate HR and ECG readings over the UART interface. This makes the \u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e an ideal solution for development of a wide range of single-channel ECG and HR-related applications, including heart rate monitoring applications, fitness applications, ECG bio-authentication, and similar.\u003c\/p\u003e\n\n\u003ch3\u003eWHAT IS ECG\u003c\/h3\u003e\n\n\u003cp\u003eECG or the electrocardiography is a process of recording the electrical activity of the heart over time, using electrodes placed on the body. These electrodes detect small electrical changes that arise from the electrophysiological pattern of the heart muscle. ECG 4 click is used to record a single-channel electrocardiogram. The electrodes can be attached to the \u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e via the 3.5mm jack. The ECG 4 click uses a three-electrode system, where two electrodes are connected to the positive and negative differential inputs of the BMD101 (SEP and SEN pins), while the third electrode is connected to the GND. The Click board™ can be used with electrodes such as these: ECG\/EMG cable, and ECG\/EMG electrodes. In this case, the white electrode is the GND electrode. You can watch a video about the electrodes and their placement, or read about it in this Let's learn blog article.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The ECG 4 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe main component of the \u003cstrong\u003eECG 4 Click Board™ \u003c\/strong\u003eis the BMD101, a highly integrated specialized bio-signal sensing System-on-Chip (SoC), from NeuroSky, a company specialized in the production of heart monitoring-related ICs and applications. This IC is the third generation of bio-sensors from this company and it features the complete HR and ECG system on a chip: the analog front-end (AFE) section contains very precise and low-noise instrumentation amplifier (LNA), which allows very low bio-signals generated by the heart to be amplified enough for the 16-bit ADC to be able to sample them.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"MikroE Sensors ECG 4 Click\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/ECG-4-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese voltage impulses are weak by nature and in the range of just a few millivolts, even microvolts. Therefore, any external interferences might obscure them. These interferences might be induced in the human body itself, or they might appear as the result of the activity of other muscles, such as skeletal muscles. Therefore, the input signal from the electrodes is processed by several filtering sections, both in the analog (HP filter at the input), and digital domain (LP filter at 100 Hz and BP filter for removing the 50\/60 Hz hum from the mains). However, the correct placement of the measurement electrodes is crucial for accurate readings. More about the electrodes and their placement can be found in the aforementioned blog article.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e allows several types of electrodes to be used. It supports both stainless-steel and silver-chloride electrode types. The electrodes are used to perform differential measurement of the voltage generated by the heart. Therefore, the heart can be monitored from a single plane only - the coronal plane. However, this is quite enough for the fitness, heart rate monitoring and similar applications. The 3.5mm electrodes connector is further protected by two TVS diodes, which prevent electrostatic discharge (ESD) through the SoC, and the Click board™ itself. The absence of the electrodes is detectable by the BMD101, which turns the sensor OFF if there is approximately 19 to 25 MΩ between the electrodes.\u003c\/p\u003e\n\n\u003cp\u003eThe BMD101 SoC uses the UART interface for the communication. The UART interface works at 57600 baud rate and has 64 bytes of TX FIFO. It uses the 8-1-1 configuration (1 start bit, 8 data bits, 1 stop bit), allowing communication beyond the host microcontroller. The UART interface could be used with any of the USB to UART clicks, allowing the PC or smartphone to process and display the HR and ECG data. More information about the UART interface can be found in the datasheet of the BMD101 SoC. However, provided mikroSDK library offers ready-made functions which speed up the software development process.\u003c\/p\u003e\n\n\u003cp\u003eThere is a CS pin on the BMD101 SoC, which is routed to the CS pin of the mikroBUS™. This pin should be set to a HIGH logic level in order to activate the internal power supply. The RESET pin is routed to the mikroBUS™ RST pin. Setting it to a LOW logic level will trigger a RESET of the BMD101.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e is designed to be interfaced with 3.3V MCUs. A proper voltage translator circuit is required if using it with 5V MCUs.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,ECG\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e is an ideal solution for development of heart rate monitoring applications, fitness applications, for the ECG bio-authentication, and similar applications.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eBMD101, a highly integrated specialized bio-signal sensing System-on-Chip (SoC), from NeuroSky.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eESD and EMI protection of the inputs, compatible with several types of electrodes, electrode absence detection, a flexible UART-based interface, signal conditioning reduces influence of movement artifacts, simplified design with the complete bio-sensing System-on-Chip (SoC).\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eUART\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eECG 4 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eChip Reset\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRST\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eChip Enable\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eCS\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eTX\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eUART Transmit\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRX\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eUART Receive\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCN1\u003c\/td\u003e\n            \u003ctd\u003e3.5mm JACK\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e3.5mm electrodes connector\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768420688061,"sku":"MIKROE-3427","price":29.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ecg-4-click-board-30253306118333.jpg?v=1685005492"},{"product_id":"mikroe-3273-ecg-3-click-board-uk","title":"ECG 3 Click Board™","description":"\u003cp\u003e\u003cb\u003e\u003cstrong\u003eNote: ECG 3 Click Board™ is a development and prototyping tool. It is not intended to be used for a medical treatment of patients and other life-critical applications!\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cp\u003eA high DC offset range allows it to be used with various electrodes, while the interrupt-based heart rate detection eliminates the need for the detection algorithm on the host MCU. A very high input impedance, coupled with the low-pass and high-pass filter options, allows user-adjustable tolerance vs accuracy factor. Embedded R-to-R detection and ECG functionalities simplify the firmware development. The inputs of the biopotential channel of the MAX30003 AFE IC are protected against the electrostatic discharge (ESD) and filtered against electromagnetic interferences (EMI), primarily generated by AC mains. Sequential power-up procedure reduces the inrush current through the electrodes, while fast recovery combined with the DC coupling helps to handle large voltage offsets between electrodes after the electrosurgery or defibrillation conditions occur.\u003c\/p\u003e\n\n\u003ch2\u003eHow Does The ECG 3 Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe\u003cem\u003e \u003cb\u003e\u003cstrong\u003eECG 3 Click Board™\u003c\/strong\u003e\u003c\/b\u003e\u003c\/em\u003e is equipped with the MAX30003 IC, an ultra-low power, single channel, integrated biopotential AFE, with the ECG and R-to-R detection functionality, from Maxim Integrated. To better understand the working principles of the ECG 3 click, some knowledge about how the heart works is required. There is a useful learning article about ECG monitoring, which can be a good starting point.\u003c\/p\u003e\n\n\u003cp\u003eElectrocardiography is a process of recording electrical activity of the heart over a period of time, using electrodes placed on the body. These electrodes detect small electrical changes that arise from the electrophysiological pattern of the heart muscle. ECG 3 click is used to record a single-channel electrocardiogram. Electrodes can be attached to ECG 3 click via the onboard 3.5mm jack. ECG 3 click uses a three-electrode system, where two electrodes are connected to the positive and negative differential input of the MAX30003 (ECGP and ECGN pins), while the third electrode is connected to the GND. The Click board™ can be used with the cable and electrodes such as these: ECG\/EMG cable, and ECG\/EMG electrodes. In this case, the white electrode is the GND electrode.\u003c\/p\u003e\n\n\u003cp\u003eThese voltage impulses are weak by nature and in the range of just a few millivolts. Therefore, any interferences might obscure them, making them undetectable. These interferences might be induced in the human body itself, or they might appear as the result of the activity of other muscles, such as skeletal muscles. The MAX30003 is armed with several methods to reduce these interferences. However, the placement of the measurement electrodes is also crucial for the accurate readings. More about the electrodes and their placement can be found in the aforementioned \u003cu\u003elearning article\u003c\/u\u003e\u003cem\u003e\u003cu\u003e.\u003c\/u\u003e\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe MAX30003 IC has two differential inputs which comprise a single ECG channel. Therefore, the heart can be monitored from a single plane only - the coronal plane. However, this is quite enough for the fitness, heart rate monitoring and similar applications. All the mentioned features are mostly related to the conditioning of the input signal and protecting the IC from voltage surges, so several types of electrodes can be used. The inputs are equipped with a single-pole, high-pass (HP) EMI filter, with the cutoff frequency set to 2MHz, as the first line of defense against the interferences. A set of integrated clamping diodes prevent the ESD surges to reach the IC and damage it. The inputs are connected with the electrodes over the protective serial switches, which are disabled by default. When developing own application, a care should be taken to turn these switches ON. However, the mikroSDK library functions included with the Click board™ take care about the proper configuring and initialization.\u003c\/p\u003e\n\n\u003cp\u003eThe differential inputs are further amplified by an integrated low-noise, high-impedance instrumentation amplifier (IA) with the fixed gain. The IA section features yet another HP filter which helps to reject movement artifacts, which are generated by skeletal muscles. Depending on the application requirements, higher cutoff frequency will result with less accurate ECG signal, but the effects of the motion artifacts will be reduced even more. This frequency is determined by a capacitor between CAPP and CAPN pins of the MAX30003 IC, which is about 0.04Hz with the 1uF capacitor used on the ECG 3 click. The recommended range for the HP cutoff frequency is from 0.04Hz up to 4.4Hz.\u003c\/p\u003e\n\n\u003cp\u003eFollowing the IA section, the MAX30003 incorporates the two-pole low-pass anti-aliasing (LP) filter, with the cutoff frequency at 600Hz, which ensures good sampling quality. The programmable gain amplifier is the next section in the signal chain, allowing optimal signal amplitudes to reach the next stage - the sigma-delta 18-bit A\/D converter, which ultimately generates the heart rate readings over the SPI interface.\u003c\/p\u003e\n\n\u003cp\u003eOther features of the MAX30003 IC include the self-testing programmable voltage sources and no leads detection. One of the key features of the AFE is the R - R interval detection. R-wave is a part of the heart rate signal, which has the highest peak. The distance between the two peaks is closely related to the heart rate and can give a good insight into the shape of the R-wave when no plot is available. Closely matched R - R and BPM values indicate that R waves are quite sharp, without irregularities. Also, the BMP (beats per minute) is an average value, while the R - R interval represents the timing between two peaks.\u003c\/p\u003e\n\n\u003cp\u003eThe extensive interrupt engine can be used to trigger the host MCU from various sources, including interrupt events due to lead detection, R-R detection, fast-recovery event, FIFO buffer states, and many more. These interrupt sources can be utilized to trigger a state change on the interrupt pin (INTB) of the MAX30003 IC. This pin is active-low.\u003c\/p\u003e\n\n\u003cp\u003eThe MAX30003 IC requires a clock signal, which is provided by the onboard oscillator. The frequency of the oscillator is 32.768 kHz. However, the \u003cb\u003e\u003cstrong\u003eECG 3 Click Board™\u003c\/strong\u003e\u003c\/b\u003e accepts the external clock signal, over the PWM pin of the mikroBUS™, which is labelled as CLK. Regarding the voltage levels, there is a TXB0106 IC implemented on the ECG 3 click, allowing it to operate with both 3.3V and 5V MCUs. This IC is a bi-directional voltage level translator from Texas Instruments. It is a proven solution used on many different Click board™ designs, which transforms voltages of the logic signals (SPI, interrupt, clock) to 1.8V-level signals, which is acceptable for the MAX30003 IC. This allows many different MCUs to be interfaced with the ECG 3 click The logic voltage selection can be done with the onboard SMD jumper labelled as PWR SEL, while the clock source can be selected by another SMD jumper, labelled as CLK SEL.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,ECG\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cb\u003e\u003cstrong\u003eECG 3 Click Board™\u003c\/strong\u003e\u003c\/b\u003e is an ideal solution for development of heart rate monitoring applications, fitness applications, for the ECG bio-authentication, and similar applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMAX30003, an ultra-low power, single channel, integrated biopotential AFE, with the ECG and R - R detection, from Maxim Integrated; TBX0106, a bidirectional level translator from Texas Instruments, AP7331, a low dropout linear regulator from Diodes Incorporated\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eInput ESD and EMI protection, high input impedance allows various electrodes to be used, a very large common mode rejection rate of over 100 dB (CMRR), signal conditioning reduces influence of movement artifacts, can be interfaced with both 3.3V and 5V MCUs\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eSPI\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cb\u003e\u003cstrong\u003eECG 3 Click Board™\u003c\/strong\u003e\u003c\/b\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003ePin\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003ePin\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eCLK\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eExternal clock\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI chip Select\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eCS\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI Clock\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eSCK\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI Data OUT\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eSDO\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI Data IN\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eSDI\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003e3V3\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD JUMPERS AND SETTINGS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003ePWR SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eSDO\/INTB pin mode selection: left position (SDO) - SPI Serial Data OUT on SDO pin, right position (INTB) - interrupt reporting on the INT pin\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP2\u003c\/td\u003e\n            \u003ctd\u003eCLK SEL\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eClock source selection: left position - external (EXT), left position - onboard (INT)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCN1\u003c\/td\u003e\n            \u003ctd\u003e3.5mm JACK\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e3.5mm electrodes connector\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768422424765,"sku":"MIKROE-3273","price":37.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ecg-3-click-board-28873009103037.jpg?v=1685156503"},{"product_id":"heart-rate-8-click-board-mikroe-3218-uk","title":"Heart Rate 8 Click Board™","description":"\u003cp\u003eOne IR and two green LEDs are driven by the BH1792GLC sensor, which provides a constant, programmable current. The choice of LEDs is not critical at all, since the integrated light filters on the sensor allow only a narrow band of green light in the range from 520nm to 560nm with 0.8X reduction in respect to the centre frequency (about 540nm). The complete monolithic integrated solution with three constant current LED drivers, narrow bandpass for the green light spectrum, IR detection, low power consumption, and a high integration ratio that allows a very low number of external components, make the \u003cstrong\u003eHeart Rate 8 Click Board™\u003c\/strong\u003e a perfect solution for the development of various wearable health-related devices, smart phones, tablets, and similar space-constrained applications.\u003c\/p\u003e\n\n\u003ch3\u003eHEART RATE MONITORING OR HRM\u003c\/h3\u003e\n\n\u003cp\u003eWhile the blood passes through the capillary blood vessels, they expand and dilate. Their light reflectance index changes accordingly. This is the basis of the photo-plethysmogram (PPM), a method used for the volumetric measurement of an organ, or in this case - blood vessels. The heart rate signal is calculated according to the changes of the reflected green light, sensed by the PD element. The Heart Rate 8 click can provide the HRM readings by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Heart Rate 8 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e\u003cem\u003eHeart Rate 8 Click Board™\u003c\/em\u003e\u003c\/strong\u003e is equipped with the BH1792GLC, a monolithic integrated sensor for heart rate monitoring, from ROHM Semiconductor company. This IC is a highly integrated optical sensor, very well suited for performing PPM measurements. Due to the large integration scale of this sensor, as well as its low power consumption, it is perfectly suited to be used on a wearable IoT device. However, being a Click board™, Heart rate 8 click allows easy evaluation and rapid application and firmware development.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Heart Rate 8 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/heart-rate-8-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eTwo green LEDs are driven by the integrated LED driving section of the BH1790GLC sensor, with the programmable Synchronized Measurement mode, with the measuring frequency between 32Hz and 1024Hz. While in this mode, two green LEDs will operated at various frequencies between 32Hz and 1024Hz, depending on the MSR bits of the measurement mode register. This allows automatic LED burst rate adjustment for achieving optimal readings. In this mode, a programmed number of measurements will be performed, and the readings will be stored on the 35 samples deep FIFO buffer. LED current can be programmed in the range from 0 to 63 mA, providing another layer of control while using this mode. The measurement is performed upon receiving the MEAS_SYNC command by setting the MEAS_SYNC bit to logic 1.\u003c\/p\u003e\n\n\u003cp\u003eThere are also two additional modes: Non-Synchronized, and Single Measurement mode, both allowing the use of the IR LED to detect an IR emitting object, such as the hand, or finger. The current through the LEDs can also be programmed in the range from 0 to 63mA, for both the IR and the green LEDs. Non-Synchronized mode offers a fixed 4 Hz LED burst operation, while the Single Measurement mode allows manual control of all the parameters. No data will be stored on the FIFO buffer in thisi mode. The measurement is performed upon receiving the MEAS_ST command by setting the MEAS_ST bit to logic 1.\u003c\/p\u003e\n\n\u003cp\u003eThe reflected light burst is detected by a sensing element in a form of a photo-diode, sampled by a low noise 16-bit A\/D converter. The photo-diodes are located behind two light filters which pass only a narrow band of green light in the range from 520nm to 560nm, with 0.8X reduction in respect to the center frequency. The top filter is an IRCUT filter, that prevents the influence of the IR light, while the second filtering layer only passes the green light. This allows even broader color range LEDs to be used, reducing the overall cost of the design. However, the \u003cstrong\u003eHeart Rate 8 Click Board™\u003c\/strong\u003e uses a pair of specialized green LEDs, with the spectral response that is closely matched to the passband properties of the optical filter. This allows most of the LED energy to be used, further improving the power consumption profile.\u003c\/p\u003e\n\n\u003cp\u003eThe second A\/D converter does not have any light filtering, allowing the light coming from the IR diode to be sensed. This is useful when a separate detection of the IR spectrum is required, for example to detect an approach of the finger. The IR LED driver is physically shared with the second green LED driver, but the IR LED has its own dedicated pin.\u003c\/p\u003e\n\n\u003cp\u003eTwo sets of four output registers contain the 16-bit measurement data in a form of two 8-bit words, for the measurement when the LEDs are ON and when the LEDs are OFF. The upper and the lower 8-bit registers contain the measurement data which can be retrieved over the standard I2C interface. The datasheet of the BH1792GLC contains the correct algorithms which describe the measurement process with more details. However, the Click board™ comes with the library which contains functions that allow measurements to be performed with minimum efforts.\u003c\/p\u003e\n\n\u003cp\u003eA dedicated programmable INT pin can be used to signal an interrupt to the host MCU. The interrupt can be triggered for several different events, including the data ready event (measurement completed), an event when the IR threshold is exceeded, and so-called watermark event which occurs when the FIFO buffer is nearly full. It can also be completely disabled. The INT pin is routed to the INT pin of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eA low number of external components required by the BH1792GLC sensor, allows enough room on the \u003cstrong\u003eHeart Rate 8 Click Board™\u003c\/strong\u003e for the PCA9306 IC, a well-known I2C level translator, allowing the Heart rate 8 click to be interfaced with many different MCUs, both operating with 3.3V and 5V logic levels.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,Heart Rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eHeart Rate 8 Click Board™\u003c\/strong\u003e is an ideal solution for the development of various wearable health-related devices, smart phones, tablet PC, etc.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eBH1792GLC, a monolithic integrated sensor with I2C interface for heart rate monitoring, from ROHM Semiconductor company\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eA complete heart rate measurement solution with constant current LED drivers, built-in photo diodes with filtering for both green and IR light spectrum, high integration ratio allowing a low number of external components, FIFO buffer for storing up to 35 samples, and more.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp lang=\"en-us\" xml:lang=\"en-us\"\u003eThis table shows how the pinout on \u003cstrong\u003ethe Heart Rate 8 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" class=\"fr-fic fr-dii\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3V3\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eLogic voltage level selection: left position 3.3V, right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768422850749,"sku":"MIKROE-3218","price":30.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-8-click-board-30247548321981.jpg?v=1685027450"},{"product_id":"heart-rate-6-click-board-mikroe-3215-uk","title":"Heart Rate 6 Click Board™","description":"\u003cp\u003eThe photo elements inside the BH1790GLC sensor are located behind the IRCUT filter, which reduces the influence of the IR spectrum of the light. There is a green filter also, narrowing down the green light responsiveness even further, which helps to achieve accurate readings, even by using common green LEDs.\u003c\/p\u003e\n\n\u003cp\u003eTwo LEDs are driven by the BH1790GLC sensor, which provides a constant, programmable current. The choice of LEDs is not critical at all since the integrated light filters on the sensor allow only a narrow band of green light in the range from 520nm to 560nm with 0.8X reduction in respect to the centre frequency (about 540nm). The complete monolithic solution IC with the two constant current LED drivers, narrow pass-band for the green light spectrum, low-power consumption, and a high integration ratio that allows a very low number of external components, make the \u003cstrong\u003eHeart Rate 6 Click Board™\u003c\/strong\u003e a perfect solution for development of various wearable health-related devices, smartphones, tablets, and similar space-constrained applications.\u003c\/p\u003e\n\n\u003ch2\u003eHeart Rate Monitoring (HRM)\u003c\/h2\u003e\n\n\u003cp\u003eWhile the blood passes through the capillary blood vessels, they expand and dilate. Their light reflectance index changes accordingly. This is the basis of the photo-plethysmogram (PPM), a method used for the volumetric measurement of an organ, or in this case - blood vessels. The heart rate signal is calculated according to the changes of the reflected green light, sensed by the PD element. The \u003cstrong\u003eHeart Rate 6 Click Board™\u003c\/strong\u003e can provide the HRM readings by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003ch2\u003eHow Does The Heart Rate 6 Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e\u003cem\u003eHeart Rate 6 Click Board™\u003c\/em\u003e\u003c\/strong\u003e is equipped with the BH1790GLC, a monolithic integrated sensor for heart rate monitoring, from ROHM Semiconductor company. This IC is a highly integrated optical sensor, very well suited for performing PPM measurements. Due to the large integration scale of this sensor, as well as its low-power consumption, it is perfectly suited to be used on a wearable IoT device. However, being a Click Board™, Heart rate 6 Click Board™ allows easy evaluation and rapid application and firmware development.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Heart Rate 6 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/cms\/heart-rate-6-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eTwo green LEDs are driven by the integrated LED driving section of the BH1790GLC sensor, with the programmable pulsating frequency of 64Hz or 128Hz. The current through the LEDs can also be programmed in the range from 0 to 60 mA. Finally, there are two settings for the pulse duration: 0.3ms and 0.6ms. These two values affect the duty cycle of the LED pulses. Optimal readings can be achieved by balancing these three parameters: the current amount through the LED (brightness), the speed of the light pulses (LED frequency), and the pulse width (0.3ms or 0.6ms).\u003c\/p\u003e\n\n\u003cp\u003eThe reflected light burst is detected by a sensing element in a form of a photo-diode, sampled by a low noise 16-bit A\/D converter. The photo-diode is located behind two light filters which pass only a narrow band of green light in the range from 520nm to 560nm, with 0.8X reduction in respect to the center frequency. The top filter is an IRCUT filter, that prevents the influence of the IR light, while the second filtering layer only passes the green light. This allows even broader color range LEDs to be used, reducing the overall cost of the design. However, Heart rate 6 Click Board™ uses the KingBright super bright clear green LEDs, with the spectral response that is closely matched to the passband properties of the optical filter. This allows most of the LED energy to be used, further improving the power consumption profile.\u003c\/p\u003e\n\n\u003cp\u003eTwo output registers contain the 16-bit measurement in a form of two 8-bit words. The upper and the lower 8-bit registers contain the measurement data, which can be retrieved over the standard I2C interface. The host MCU can read these registers in cycles of 1\/32 sec, or 1\/64 sec, depending on the BH1790GLC settings. The datasheet of the BH1790GLC contains the correct algorithms, which describe the measurement process with more details. However, the Click Board™ comes with the library which contains functions that allow measurements to be performed with minimum efforts.\u003c\/p\u003e\n\n\u003cp\u003eThe I2C pins of the BH1790GLC sensor are routed to the respective mikroBUS™ I2C pins. The I2C bus lines are already equipped with two pull-up resistors, which together with the two external LEDs are the only components required by the BH1790GLC sensor. Pullup resistors are connected to the 3.3V power rail so that the \u003cstrong\u003eHeart Rate 6 Click Board™\u003c\/strong\u003e can be used only with MCUs that use logic levels up to 3.3V for the communication.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,Heart Rate\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThis sensor is an ideal solution for development of various wearable health-related devices, smart phones, tablets, and similar space-constrained applications.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eBH1790GLC, a monolithic integrated sensor with I2C interface for heart rate monitoring, from ROHM Semiconductor company\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eA complete monolithic heart rate measurement solution with two constant current LED drivers, narrow pass-band for the green light spectrum, low power consumption, and a high integration ratio that allows very low number of external components, and more\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp lang=\"en-us\" xml:lang=\"en-us\"\u003eThis table shows how the pinout on \u003cstrong\u003ethe Heart Rate 6 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" class=\"fr-fic fr-dii\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3V3\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768422949053,"sku":"MIKROE-3215","price":21.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-6-click-board-30247663599805.jpg?v=1685027276"},{"product_id":"mikroe-3446-ecg-5-click-board-uk","title":"ECG 5 Click Board™","description":"\u003cp\u003eAdditional features of the AD8232 include HR LED indicator for visual feedback, adaptive high-pass filter for faster recovery, dedicated reference buffer for the virtual ground, and high ESD rating, up to 8kV human body model. All these features allow the \u003cem\u003e\u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e\u003c\/em\u003e to be used in a range of health-related ECG and HR applications, including fitness and activity heart rate monitors, portable ECG, wearable and remote health monitors, and similar.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The \u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e is a development and prototyping tool. It is not intended to be used for medical treatment of patients, and should not be used to diagnose or treat any conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The ECG 5 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eTo measure the activity of the heart muscle, it is necessary to extract its weak electrical impulses, reduce the interferences of surrounding tissues and the environment, amplify them, and allow them to be further processed, most likely in the digital domain. Such a task demands very specific instrumentation equipment. The \u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e utilizes the AD8232, an integrated heart rate monitoring front-end, by Analog Devices. This IC is targeted towards wearables and battery-operated applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"MikroE Click Boards Sensors ECG 5 Click\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/ecg-5-click-inner.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe heart-rate impulses are weak by nature and in the range of just a few millivolts, even microvolts. Therefore, any external interference might obscure them. The interferences might be induced in the human body itself, or they might appear as the result of the activity of other muscles, such as skeletal muscles. Therefore, the input signal from the electrodes is processed by several filtering sections, until it is amplified to a value suitable for sampling. However, the correct placement of the measurement electrodes is crucial for accurate readings. More about the electrodes and their placement can be found in this blog article.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e features a 3.5mm jack connector, which is used to connect three electrodes. One of the electrodes is a so-called right leg drive electrode (RLD), used to set the body of the patient to the same potential as the rest of the system. In addition, it is used to reduce the noise which results from the human-body acting as an antenna (picking up 50\/60 Hz hum from the mains, etc.) Along with the integrated 2-pole high-pass filtering section, and the RFI filtering section, the IC effectively reduces the overall system noise.\u003c\/p\u003e\n\n\u003cp\u003eLead-off detection is very important for accurate ECG measurements. Therefore, this IC is equipped with the dedicated LOD pin, which is set to a HIGH logic level when any of the electrodes is missing. Lead-off circuitry is basically a comparator, that makes sure that the body stays within 0.5V from the positive rail. By featuring two separate LOD pins, it is possible to determine the exact electrode that may be missing. In DC lead-off detection mode, all three electrodes must be connected. The LOD+ is routed to the mikroBUS™ INT pin, while the LOD- is routed to the mikroBUS™ PWM pin. The pins are labelled as LO+ and LO- respectively, on this Click board™.\u003c\/p\u003e\n\n\u003cp\u003eDue to the signal filtering within the AD8232 IC, the settling time for the connected electrodes may be too long. Therefore this IC features the fast restore option (FR pin is pulled to a HIGH logic level on ECG 5 click), which dynamically sets the cutoff frequency to a higher value, speeding up the settling time, which may be in the magnitude of several seconds (for example, when the electrodes are connected).\u003c\/p\u003e\n\n\u003cp\u003eThe IC can be driven to a low power consumption mode. If the SDN pin is pulled to a LOW logic level, the IC will enter the standby mode, greatly reducing the power consumption. By utilizing the LOD pins, the MCU can be programmed to enter the standby mode along with the AD8232, which is ideal for battery-powered applications. SDN pin is routed to the mikroBUS™ CS pin and is labelled as SDN.\u003c\/p\u003e\n\n\u003cp\u003eThe OUT pin of the AD8232 is routed to the AN pin of the mikroBUS™. It provides the amplified and filtered signal from the electrodes, which can be used directly on the A\/D peripheral of the host MCU. The AD8232 can drive both resistive and capacitive loads, so no additional buffering IC is required. In addition, the \u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e is equipped with a LED labelled as ECG, which can be used as a visual indicator of the output signal.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,ECG\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e is an ideal solution for development of health-related ECG applications, including fitness and activity heart rate monitors, portable ECG, wearable and remote health monitors, and similar.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eAD8232, an integrated heart rate monitoring front-end, by Analog Devices.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eESD and EMI protection of the inputs, compatible with several types of electrodes, lead-off detection for each electrode, bio-signal conditioning reduces influence of movement artifacts, simplified design with the complete heart monitoring front end.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eAnalog,GPIO\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eECG 5 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eAnalog ECG signal OUT\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eAN\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eLO-\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eLead-off detection for IN-\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eLO+\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eLead-off detection for IN+\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eChip Enable\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eSDN\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED Indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCN1\u003c\/td\u003e\n            \u003ctd\u003e3.5mm jack\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e3.5mm jack connector for electrodes\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768429666493,"sku":"MIKROE-3446","price":29.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ecg-5-click-board-30253280690365.jpg?v=1685005495"},{"product_id":"heart-rate-9-click-board-mikroe-3822-uk","title":"Heart Rate 9 Click Board™","description":"\u003ch3\u003eHow Does The Heart Rate 9 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e\u003cem\u003eHeart Rate 9 Click Board\u003c\/em\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cem\u003e™\u003c\/em\u003e\u003c\/strong\u003e utilizes a Phase Division Multiplexing technique to simultaneously measure multiple signals with zero cross talk. This technique is implemented using the PIC16F1779 MCU's integrated Core Independent Peripherals (CIPs) from Microchip. Using the CIPs allows you to achieve a low-noise reflective heart rate monitor design with significantly lower BOM costs than conventional designs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Heart Rate 9 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/heart-rate-9-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHeart Rate 9 Click Board™\u003c\/strong\u003e introduces Microchip's proprietary method (hereafter \"proprietary method\") of measuring multiple signals in a body using pseudorandom binary sequence generation and phase division multiplexing. This proprietary method uses a special encoding\/decoding scheme to allow multiple light-emitting diodes (LED) transmitting light simultaneously with a single photodiode to condition each light from the combined lights at the receiving side.\u003c\/p\u003e\n\n\u003cp\u003eWhile the blood passes through the capillary blood vessels, they expand and dilate. Their light reflectance index changes accordingly. This is the basis of the photo-plethysmogram (PPM), a method used for the volumetric measurement of an organ, or in this case - blood vessels. The heart rate signal is calculated according to the changes of the reflected green light, sensed by the PD element. The Heart Rate 6 Click Board™ can provide the HRM readings by simply placing the index finger over the optical sensor.\u003c\/p\u003e\n\n\u003cp\u003eOxygen saturation in the blood can be determined by measuring the light absorption in the red\/IR part of the spectrum. The oxygen saturated blood absorbs more red light and less infrared than the unsaturated blood. This fact can be used to determine the oxygen saturation of the blood. For a healthy adult person, the peripheral capillary oxygen saturation (SpO2) percentage ranges from 95% to 100%.\u003c\/p\u003e\n\n\u003cp\u003eThe challenge in a multiple signal sources system (for example, the LEDs in the case of a pulse oximeter) is that each LED must share the same photodiode. A classic solution is to turn on each light source in sequence and then take each measurement in turn. Each light source gets its own slice of time in which the photodiode can get its measurement. This method is called Time-Division Multiplexing (TDM). The same principle is also applied to the TDMA-based cellular system. The drawback of the TDM approach is that adding more light sources, while keeping the data processing routine the same, results in more time to get a measurement from every source.\u003c\/p\u003e\n\n\u003cp\u003eMicrochip's proprietary method uses a known concept called Maximal Length (ML) sequence, a type of pseudorandom binary sequence, to generate a gold code or a reference sequence. This reference sequence is then phase shifted using Phase Division Multiplexing (PDM) to drive multiple LEDs. The light amplitudes from these LEDs, after passing through a part of a body, are detected by a phototransistor or photodiode and digitized with an Analog-to-Digital Converter (ADC). The digitized ADC light amplitude values are re-correlated with each LED's driving sequence. Spread spectrum techniques are known for their noise mitigation properties and ability to pass multiple signals through the same medium without interference. Thus, these measurements of each light absorption of the body can be performed substantially simultaneously with minimal interference from each other.\u003c\/p\u003e\n\n\u003cp\u003eThe SFH7060 made by OSRAM integrates three green, one red, one infrared emitter and one photodiode that are all placed in a reflective type of package. The reflective photosensing method has become increasingly popular in developing small, wearable biometric sensors, such as those green light sensors seen in the back of smart watches or activity tracker wristbands.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable class=\"specification-table-gray\"\u003e\n    \u003ctbody\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eHeart Rate,Biometrics\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eIt can be used to develop applications based on the heart rate monitoring, pulse oximetry measurements, calorie expenditure, and similar health-related applications.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003ePIC16F1779 MCU and SFH 7060 sensor\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eSingle-chip implementation using an eXtreme low-power (XLP) PIC16F1779 8-bit MCU, Integrated features of the 8-bit MCU use a Phase Division Multiplexing technique to simultaneously measure multiple signals with zero cross talk, Low overall BOM cost due to integrated Core Independent Peripherals ( CIPs) and Analog features, Core Independent Peripherals reduce software overheard.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eGPIO,UART\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eClick Board™ size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 class=\"section-title\"\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on the \u003cstrong\u003eHeart Rate 9 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable class=\"pinout-diagram-gray\" width=\"549\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"mikroBUS logo.png\" class=\"fr-fic fr-dii\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/files\/mikroBUS-logo-black_1.png?v=1628760408\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eReset\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRST\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eTX\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eUART Transmit\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRX\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eUART Receive\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 class=\"section-title\"\u003e\n\u003cbr\u003e\nONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable class=\"additional-info-tables-gray\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003e Description\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED Indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD2\u003c\/td\u003e\n            \u003ctd\u003eRED\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePulse Detection Indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768433139901,"sku":"MIKROE-3822","price":16.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-heart-rate-9-click-board-30247588724925.jpg?v=1685222759"},{"product_id":"mikroe-4061-ecg-6-click-board-uk","title":"ECG 6 Click Board™","description":"\u003ch3\u003eHow Does The ECG 6 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 6 Click Board™\u003c\/strong\u003e is based on the MAX86150, is a complete electrocardiogram (ECG) from Maxim Integrated. It is designed for mobile health. The Click board™ has many features to provide health measurements: electrocardiogram, pulse oximetry, and heart rate.  All these features allow ECG 6 click to be used in a range of health-related ECG, SpO2 subsystem and HR applications including fitness and activity heart rate monitors, portable ECG, wearable and remote health monitors, and similar.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"ECG 6 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/ecg-6-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe MAX86150 contain integrated the SpO2 subsystem. The SpO2 subsystem is peripheral capillary oxygen saturation. It is measured by a device called a pulse oximeter. A clip is placed on the finger or foot of the patient and light is sent through the finger and measured on the other side. The MAX86150 integrates red and infrared LED drivers to modulate LED pulses for SpO2 and HR measure­ments. The LED current can be programmed from 0mA to 100mA with proper VLED supply voltage. The LED pulse width can be programmed from 50μs to 400μs to optimize accuracy of results and power consumption based on use cases.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eECG 6 Click Board™ \u003c\/strong\u003eallows several types of electrodes to be used. It supports both stainless-steel and silver-chloride electrode types. The electrodes are used to perform differential measurement of the voltage generated by the heart. Therefore, the heart can be monitored from a single plane only - the coronal plane. However, this is quite enough for the fitness, heart rate monitoring and similar applications.\u003c\/p\u003e\n\n\u003cp\u003eThe extensive interrupt engine can be used to trigger the host MCU from various sources, including interrupt events due to lead detection, R-R detection, fast-recovery event, FIFO buffer states, and many more. These interrupt sources can be utilized to trigger a state change on the interrupt pin (INT) of the MAX86150 IC. This pin is active-low.\u003c\/p\u003e\n\n\u003cp\u003eThe voltage level of the logic section can be selected via VCC SEL jumper, between 3.3V and 5V. This allows for both 3.3V and 5V capable MCUs to use the SPI communication lines properly.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable class=\"specification-table-gray\"\u003e\n    \u003ctbody\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics,ECG\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eMedical health: Fitness Assistant Devices, Wearable Devices, Smartphones, Tablet,\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMAX86150 electrocardiogram from Maxim Integrated.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eReflective Heart Rate Monitor, Medical-Grade Pulse Oximeter,\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003ch3 class=\"section-title\"\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on the \u003cstrong\u003eECG 6 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable class=\"pinout-diagram-gray\" width=\"549\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" class=\"fr-fic fr-dii\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/files\/mikroBUS-logo-black_1.png?v=1628760408\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt OUT\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e \u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 class=\"section-title\"\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable class=\"additional-info-tables-gray\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003e Description\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003ePower supply voltage selection: left position 3.3V, right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCN1\u003c\/td\u003e\n            \u003ctd\u003e3.5mm JACK\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e3.5mm electrodes connector\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768438743229,"sku":"MIKROE-4061","price":24.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ecg-6-click-board-28873023815869.jpg?v=1685157241"},{"product_id":"mikroe-4267-oximeter-3-click-board-uk","title":"Oximeter 3 Click Board™","description":"\u003ch3\u003eHow Does The Oximeter 3 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eOximeter 3 Click Board™\u003c\/strong\u003e\u003c\/em\u003e is based on the VCNL4020C-GS08, a fully integrated biosensor and ambient light sensor with an I2C interface from Vishay Semiconductor. The VCNL4020C-GS08 sensor comes with a built-in infrared emitter, and signal processing IC in a single package with a 16 bit ADC. It also has an ambient light PIN photodiode with close-to-human-eye sensitivity with excellent ambient light suppression through signal modulation. For biosensor functionality, it converts the current from the PIN photodiode to a 16-bit digital data output value, while for the ambient light sensing it converts the current from the ambient light detector, amplifies it, and converts it to a 16-bit digital output stream.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"oximeter 3 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/oximeter-3-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe integrated infrared emitter has a peak wavelength of 890 nm. It emits light that reflects off an object within 20 cm of the sensor and has a programmable drive current from 10 mA to 200 mA in 10 mA steps. The built-in infrared emitter and broader sensitivity photodiode also can work with the additional on-board green LED and IRLED as designed on this Click board™. As an additional light source true green color LED (VLMTG1300) with a 525nm peak wavelength is used, alongside an infrared dual-color emitting diode (VSMD66694) with 660 nm and 940 nm peak wavelength well suited for measuring the optical pulse oximetry.\u003c\/p\u003e\n\n\u003cp\u003eThe PIN photodiode receives the light that is reflected off the object and converts it to a current. It has a peak sensitivity of 890 nm, matching the peak wavelength of the emitter, and it is insensitive to ambient light. The VCNL4020C also provides ambient light sensing to support conventional backlight and display brightness auto-adjustment. The ambient light sensor receives the visible light and converts it to a current, and it has peak sensitivity at 540 nm and bandwidth from 430 nm to 610 nm.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOximeter 3 Click Board™\u003c\/strong\u003e communicates with the MCU using the standard I2C 2-wire interface with fixed slave address compatible with all I2C modes (Standard, Fast, and High-Speed). It allows easy access to a biosensor signal and light intensity measurements without complex calculations or programming. It also generates programmable interrupt signal routed on the INT pin of the mikroBUS™, that offers Wake-Up functionality for the MCU when a proximity event or ambient light change occurs, which reduces processing overhead by eliminating the need for continuous polling.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOximeter 3 Click Board™\u003c\/strong\u003e is designed to be operated with both 3.3V and 5V logic voltage levels that can be selected via VCC SEL jumper. This allows for both 3.3V and 5V capable MCUs to use the I2C communication lines properly.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eCan be used for applications such as optical pulse oximetry and health monitoring.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eOximeter 3 Click Board™\u003c\/strong\u003e is based on the VCNL4020C-GS08, a fully integrated biosensor and ambient light sensor with an I2C interface from Vishay Semiconductor.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eLow current consumption, onboard LEDs optimized for the oximetry measurements, high frequency bursts for biosensor signal measurement, programmable interrupt function, and more.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eS (28.6 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eOximeter 3 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eINT\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED Indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD2\u003c\/td\u003e\n            \u003ctd\u003eVLMTG1300\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eGreen Measurement LED\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eIR1\u003c\/td\u003e\n            \u003ctd\u003eVSMD66694\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eInfrared Measurement LED\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003ePower Supply Voltage Selection 3V3\/5V: Left position 3V3, Right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eOXIMETER 3 CLICK ELECTRICAL SPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n            \u003cth\u003eMin\u003c\/th\u003e\n            \u003cth\u003eTyp\u003c\/th\u003e\n            \u003cth\u003eMax\u003c\/th\u003e\n            \u003cth\u003eUnit\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSupply Voltage\u003c\/td\u003e\n            \u003ctd\u003e-0.3\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e5.5\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eAmbient Light Resolution\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e0.25\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eIk\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eIR1 Infrared Wavelenght\u003c\/td\u003e\n            \u003ctd\u003e660\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e940\u003c\/td\u003e\n            \u003ctd\u003enm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD2 Green LED Wavelenght\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e525\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003enm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n            \u003ctd\u003e-25\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e+85\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768478064829,"sku":"MIKROE-4267","price":12.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-oximeter-3-click-board-29658749141181.jpg?v=1685143374"},{"product_id":"mikroe-4292-oximeter-2-click-board-uk","title":"Oximeter 2 Click Board™","description":"\u003ch3\u003eHow Does The Oximeter 2 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eOximeter 2 Click Board™\u003c\/strong\u003e\u003c\/em\u003e is based on the ADPD144RI, a highly integrated, photometric front end optimized for photoplethysmography (PPG) detection of blood oxygenation from Analog Devices. It combines highly efficient, red and infrared LED emitters, with 660nm red and 880nm IR wavelengths, and a sensitive 4-channel photodiode with a custom ASIC that provides optical isolation between the integrated LED emitters and the detection photodiodes to improve the signal-to-noise ratio. It uses synchronous detection of optical pulses to enhance the rejection of ambient light in addition to low power consumption.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"oximeter 2 Click Board™ inner\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/oximeter-2-click-inner.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOximeter 2 Click Board™\u003c\/strong\u003e is designed for ultralow direct optical reflections, with independent AFE settings per channel and I2C control interface. The integrated LED emitters produce light pulses synchronous with the active sampling period of the AFE, which consisting of a programmable TIA, a band-pass filter, and an integrator. The processed analog signals are digitized by a 14-bit ADC and summed by the 20-bit burst accumulator. Four simultaneous sampling channels are matrixed into two independent time slots (one for each LED wavelength). An adjustable number of pulses per sample, accumulation, and averaging can be applied to multiple samples to increase the dynamic range to 27 bits.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOximeter 2 Click Board™\u003c\/strong\u003e communicates with MCU using the standard I2C 2-Wire interface, with a typical clock frequency of 400kHz. A high-speed I2C interface allows data to be read from output registers directly or through a FIFO buffer. All register writes are single word only and require 16 bits of data. It also comes with a programmable interrupt line, labelled as INT and routed on the INT pin of the mikroBUS™ socket that simplifies timely data access. The ADPD144RI does not require a specific Power-Up sequence but requires a supply voltage of 1.8V in order to work properly. Therefore, a small regulating LDO is used, the ADP160 from Analog Devices, providing a 1.8V out of 3.3V mikroBUS™ rail.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOximeter 2 Click Board™\u003c\/strong\u003e is designed to be operated only with a 3.3V logic voltage level. A proper logic voltage level conversion should be performed before the Click board™ is used with MCUs with different logic levels. However, MikroE equipped its users with a library that contains functions and an example code that can be used, as a reference, for further development.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eBiometrics\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eCan be used for applications such as optical pulse oximetry and health monitoring.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eADPD144RI - highly integrated photometric front end optimized for photoplethysmography (PPG) detection of blood oxygenation from Analog Devices ADP160 - ultralow quiescent current linear regulator from Analog Devices\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eIntegrated optical components, fully integrated AFE, ADC, LED drivers, and timing core, low power consumption, designed for ultralow direct optical reflections, and more.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eS (28.6 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eOximeter 2 Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eINT\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED Indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eOXIMETER 2 CLICK ELECTRICAL SPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n            \u003cth\u003eMin\u003c\/th\u003e\n            \u003cth\u003eTyp\u003c\/th\u003e\n            \u003cth\u003eMax\u003c\/th\u003e\n            \u003cth\u003eUnit\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSupply Voltage\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e3.3\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eRed LED Wavelenght\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e660\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003enm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInfrared LED Wavelenght\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e880\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003enm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eADC Resolution\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ebits\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n            \u003ctd\u003e-40\u003c\/td\u003e\n            \u003ctd\u003e+25\u003c\/td\u003e\n            \u003ctd\u003e+85\u003c\/td\u003e\n            \u003ctd\u003e°C\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":38028932448445,"sku":"MIKROE-4292","price":24.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-oximeter-2-click-board-30237771727037.jpg?v=1685194680"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/collections\/lg-eeg-click-in-use.jpg?v=1724338062","url":"https:\/\/thedebugstore.com\/en-pt\/collections\/biometrics-click-boards-catalogue.oembed?page=3","provider":"Debug Store","version":"1.0","type":"link"}