{"title":"Gas Sensor Click Boards™","description":"\u003cp data-mce-fragment=\"1\"\u003eOur Gas Sensor Click Boards™ utilize advanced sensing technologies to monitor gases such as carbon monoxide (CO), methane (CH4), nitrogen dioxide (NO2), and many others. With their compact size and easy-to-use design, these Click Boards™ can be effortlessly integrated into your existing projects, prototypes, or development boards.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eMikroE Gas Sensor Click Boards™ are known for their exceptional accuracy, sensitivity, and fast response time. They feature high-quality gas sensors, ensuring reliable and consistent measurements. These Click Boards™ also come with built-in calibration features, allowing you to achieve optimal performance without the need for additional calibration tools.\u003c\/p\u003e","products":[{"product_id":"hydrogen-click-board-mikroe-1629-uk","title":"Hydrogen 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\/5_hZu8pIkz4\" title=\"YouTube video player\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n\u003ch2\u003eMQ-8 Sensor\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eHydrogen Click Board™\u003c\/strong\u003e\u003c\/em\u003e is based on the MQ-8 sensor features a gas sensing layer constructed of tin dioxide which is an inorganic compound with the formula SnO2. Tin dioxide is known to have lower conductivity in clean air. As the percentage of hydrogen increases in the environment, the conductivity rises too.\u003c\/p\u003e\n\n\u003ch2\u003eMode of Communication\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHydrogen Click Board™\u003c\/strong\u003e uses AN (OUT) mikroBUS line for communicating with the target board. This accessory board is designed to use a 5V power supply only.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHydrogen Click Board™\u003c\/strong\u003e finds great application in designing gas leakage equipment. Being suitable for detecting hydrogen concentration, Hydrogen Click Board™ can be used in the environments like hydrochloric acid production, atomic hydrogen welding, those using hydrogen as a rotor coolant in electrical generators, and also metallic ore reduction.\u003c\/p\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768345288893,"sku":"MIKROE-1629","price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-hydrogen-click-board-30275169157309.jpg?v=1685195930"},{"product_id":"methane-click-board-mikroe-1628-uk","title":"Methane Click Board™","description":"\u003cp\u003e\u003ciframe allowfullscreen=\"\" frameborder=\"0\" src=\"\/\/www.youtube.com\/embed\/R8TS_YnTnzs\" style=\"width:500px;height:281px;\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n\u003ch2\u003eMethane (CH4) sensor: MQ-4\u003c\/h2\u003e\n\n\u003cp\u003eMQ-4 methane sensor has a fast response time and output is an analog resistance. The sensor requires to be preheated for accurate calibration. It takes more than 24 hours for the sensor to reach the right temperature after it has been powered on.\u003c\/p\u003e\n\n\u003ch2\u003eVoltage Requirements\u003c\/h2\u003e\n\n\u003cp\u003eMethane Click Board™ has been designed to use a 5V power supply only. This accessory board uses AN (OUT) mikroBUS line for communicating with the target board.\u003c\/p\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768345321661,"sku":"MIKROE-1628","price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-methane-click-board-28891616673981.jpg?v=1685112775"},{"product_id":"lpg-click-board-mikroe-1587-uk","title":"LPG Click Board™","description":"\u003ch2\u003eLPG sensor: MQ-5\u003c\/h2\u003e\n\n\u003cp\u003eMQ-5 liquefied petroleum gas sensor has a fast response time and output is an analog resistance. It is also highly sensitive to natural gas and town gas. The sensor requires to be preheated for accurate calibration, and it takes more than 24 hours for the sensor to reach the right temperature after being powered on. As the concentration of the target air changes, the resistance of the sensor component also gets changed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\n.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan class=\"fr-video fr-fvc fr-dvi fr-draggable\"\u003e\u003ciframe allowfullscreen=\"\" class=\"fr-draggable\" frameborder=\"0\" src=\"\/\/www.youtube.com\/embed\/t5sgZ-dP9ao\" style=\"width:500px;height:281px;\"\u003e\u003c\/iframe\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch2\u003ePower Requirements\u003c\/h2\u003e\n\n\u003cp\u003eLPG Click Board™ needs a 5V power supply only. This accessory board uses AN (OUT) mikroBUS line for communicating with the target board.\u003c\/p\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768345354429,"sku":"MIKROE-1587","price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-lpg-click-board-30244430708925.jpg?v=1685016470"},{"product_id":"alcohol-click-board-mikroe-1586-uk","title":"Alcohol Click Board™","description":"\u003cp\u003eThe\u003cstrong\u003e \u003cem\u003eAlcohol Click Board™\u003c\/em\u003e\u003c\/strong\u003e has a high sensitivity to alcohol and it can be used to detect alcohol in concentrations from 0.04 to 4mg\/l.\u003c\/p\u003e\n\n\u003cp\u003eAlcohol click carries an MQ-3 Semiconductor sensor for alcohol. The click is designed to run on a 5V power supply only. It communicates with the target microcontroller through the AN pin on the mikroBUS™ line. \u003c\/p\u003e\n\n\u003ch3\u003eMQ-3 Sensor Features\u003c\/h3\u003e\n\n\u003cp\u003eThe gas sensing layer on the sensor unit is made of Tin dioxide (SnO2), an inorganic compound that has lower conductivity in clean air. The conductivity increases as the levels of alcohol gas rise.\u003c\/p\u003e\n\n\u003ch3\u003eSensor  Calibration\u003c\/h3\u003e\n\n\u003cp\u003eTo calibrate the sensor for the environment you'll be using it in, the \u003cstrong\u003eAlcohol Click Board™\u003c\/strong\u003e has a small potentiometer that allows you to adjust the Load Resistance of the sensor circuit.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n    \u003cli\u003eMQ-3 sensor\n    \u003cul\u003e\n        \u003cli\u003eConcentration: 0.04-4mg\/l alcohol\u003c\/li\u003e\n        \u003cli\u003eSensitivity: Rs(in air)\/Rs(0.4mg\/LAlcohol)≥5\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003eInterface: Analog\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":37768345419965,"sku":"MIKROE-1586","price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-alcohol-click-board-30267418149053.jpg?v=1684982461"},{"product_id":"mikroe-1630-air-quality-click-board-uk","title":"Air Quality Click Board™","description":"\u003cp\u003eThe\u003cem\u003e\u003cstrong\u003e Air Quality Click Board™\u003c\/strong\u003e\u003c\/em\u003e is a simple solution for adding a high sensitivity sensor for detecting a variety of gases that impact air quality in homes and offices. It carries an MQ-135 sensor. The click is designed to run on a 5V power supply. It communicates with the target microcontroller over the AN pin on the mikroBUS™ line.\u003c\/p\u003e\n\n\u003ch3\u003eDetecting Gases\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAir Quality Click Board™\u003c\/strong\u003e is suitable for detecting ammonia (NH3), nitrogen oxides (NOx) benzene, smoke, CO2 and other harmful or poisonous gases that impact air quality. The MQ-135 sensor unit has a sensor layer made of tin dioxide (SnO2), an inorganic compound that has lower conductivity in clean air than when polluting gases are present.\u003c\/p\u003e\n\n\u003ch3\u003eCalibration Potentiometer\u003c\/h3\u003e\n\n\u003cp\u003eTo calibrate the \u003cstrong\u003eAir Quality Click Board™\u003c\/strong\u003e for optimum performance, use the onboard potentiometer to adjust the load resistance on the sensor circuit.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\n\u003cul\u003e\n    \u003cli\u003eMQ-135 sensor\n    \u003cul\u003e\n        \u003cli\u003eSnO2 gas sensing layer\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003eInterface: AN\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":37768345944253,"sku":"MIKROE-1630","price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-air-quality-click-board-30267500069053.jpg?v=1685207996"},{"product_id":"mikroe-1626-co-click-board-uk","title":"CO Click Board™","description":"\u003ch2\u003eCarbon Monoxide (CO) Sensor: MQ-7\u003c\/h2\u003e\n\n\u003cp\u003eThe MQ-7 sensor has high sensitivity to carbon monoxide. The gas sensing layer on the sensor unit is made of Tin dioxide (SnO2), which has lower conductivity in clean air. The conductivity increases as the levels of Carbon monoxide rise. The detection range of the sensor is 20ppm-2000ppm of CO.\u003c\/p\u003e\n\n\u003cp\u003eTo calibrate the sensor for the environment youll be using it in, CO Click Board™ has a small potentiometer that allows you to adjust the Load Resistance of the sensor circuit. For precise calibration, the sensor needs to preheat (once powered up, it takes 48h to reach the right temperature).\u003c\/p\u003e\n\n\u003ch2\u003eHighly Useful\u003c\/h2\u003e\n\n\u003cp\u003eCarbon monoxide gas sensors are used to detect the presence of that gas and prevent carbon monoxide poisoning. Since carbon monoxide has no smell or colour, humans cannot detect it. In high concentrations, it can be lethal.\u003c\/p\u003e\n\n\u003cp\u003eCO Click Board™ finds its application in designing of gas leakage equipment. Being suitable for detecting carbon monoxide concentration, CO Click Board™ can be used in the devices like portable gas detectors, domestic gas leakage detectors and industrial combustible gas detectors.\u003c\/p\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768345977021,"sku":"MIKROE-1626","price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-co-click-board-30265146409149.jpg?v=1684990373"},{"product_id":"mikroe-2516-pollution-click-board-uk","title":"Pollution Click Board™","description":"\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003ePollution Click Board™\u003c\/strong\u003e\u003c\/em\u003e has high sensitivity to organic gases such as methanal (also known as formaldehyde), benzene, alcohol, toluene, etc. The click carries the WSP2110 VOC gas sensor with the detection range of 1～50ppm (parts per million).\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ePollution Click Board™\u003c\/strong\u003e is designed to run on a 5V power supply. It communicates with the target MCU over AN and RST pin on the mikroBUS™ line.\u003c\/p\u003e\n\n\u003ch3\u003eWSP2110 VOC GAS SENSOR\u003c\/h3\u003e\n\n\u003cp\u003eWSP2110 VOC gas sensor is a MOS type (metal oxide semiconductor) sensor that detects volatile organic compounds such as methanal, benzene, alcohol and other types of gases that can be harmful to one's health in high concentrations.\u003c\/p\u003e\n\n\u003cp\u003eThe concentration of the target gas affects the conductivity of the sensor. Higher concentration of the gas means the conductivity of the sensor gets higher as well.\u003c\/p\u003e\n\n\u003cp\u003eFor precise calibration, the sensor needs to preheat (once powered up, it takes 120h to reach the right temperature).\u003c\/p\u003e\n\n\u003ch3\u003eSENSOR'S SENSITIVITY\u003c\/h3\u003e\n\n\u003cp\u003eP1 potentiometer onboard is used for trimming the sensor's sensitivity. Enable the pin drive gate of heaters MOSFET switch to reduce power consumption when the click is not in use.\u003c\/p\u003e\n\n\u003ch3\u003eDETECTION RANGE\u003c\/h3\u003e\n\n\u003cp\u003eThe detection range of the sensor is 1～50ppm (part per million). Parts per million is the numbers of parts of a component in 1 million parts of the gas mixture, it's the ratio of one gas to another.\u003c\/p\u003e\n\n\u003ch3\u003eVOLATILE ORGANIC COMPOUNDS\u003c\/h3\u003e\n\n\u003cp\u003eVolatile organic compounds or VOCs are organic chemicals. They have very high vapor pressure at room temperature, and some of them can be harmful to human health. As most people spend a lot of time indoors it's important to know if the quality of the air is good. With Pollution click you could always know if your indoor environment is healthy enough.\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\u003eGas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eAutomatic exhaust devices, air cleaners, harmful gas detection devices, etc.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eWSP2110 VOC gas sensor\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eDetection range 1～50ppm, Sensitivity S Rs(in air)\/Rs(in 10ppm toluene)≥3\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\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\u003ePollution 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 out pin\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\u003eEnable sensor\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\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\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\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":37768392868029,"sku":"MIKROE-2516","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-pollution-click-board-30239181570237.jpg?v=1685024206"},{"product_id":"mikroe-2767-ozone-2-click-board-uk","title":"Ozone 2 Click Board™","description":"\u003cp\u003eFeaturing an accurate 22-bit ADC and a high-quality O\u003csub\u003e3\u003c\/sub\u003e sensor protected by a stainless mesh, the \u003cstrong\u003eOzone 2 Click Board™\u003c\/strong\u003e can be used in a range of applications used to measure or detect O\u003csub\u003e3\u003c\/sub\u003e gas concentrations in the atmosphere, for small testing equipment development, various warning systems for air quality \/ ozone pollution, and other similar applications that are used for the ozone concentration detection and monitoring.\u003c\/p\u003e\n\n\u003ch2\u003eHow Does The Ozone 2 Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe main sensor component of the \u003cstrong\u003eOzone 2 Click Board™\u003c\/strong\u003e is the MQ131 ozone (O\u003csub\u003e3\u003c\/sub\u003e) gas sensor from Winsen Sensor, which uses the SnO2 (tin-oxide) alloy, which decreases its resistance while exposed to the O\u003csub\u003e3\u003c\/sub\u003e gas. The greater the O\u003csub\u003e3\u003c\/sub\u003e concentration is, the more conductive this material becomes. This can be utilized to obtain the O\u003csub\u003e3\u003c\/sub\u003e concentration readings. The sensor itself contains a small heating element, connected to 5V power supply. It needs to be preheated for 48h before it can perform as specified. The sensitivity of the sensor is given as the ratio between the resistance in air and the resistance in the O\u003csub\u003e3\u003c\/sub\u003e gas concentration of 50ppm, which is ≥ 3 (R\u003csub\u003eO\u003c\/sub\u003e\/R\u003csub\u003eS\u003c\/sub\u003e ≥ 3). The sensor is protected against particles and mechanical damage by a stainless mesh, however, exposing to excessive moisture and corrosive gases can damage the inner structure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Ozone 2 Click inneri\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/Ozone_2_Click_inneri2.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe measuring circuit consists of the MQ131 sensor, a power source and a load resistor (RL) between the output pin and GND. The sensor with its internal resistance forms a voltage divider with the load resistor. The RL is designed as a variable resistor, allowing the output voltage to be trimmed to the desired value. The calibration should be performed in controlled conditions, as the resistance of the sensor is affected by both the ambient temperature and humidity. The sensor can be used to measure relative O\u003csub\u003e3\u003c\/sub\u003e concentration change without an accurate calibrating, which is useful for building applications that can be used as warning systems. The middle tap of the sensor-RL voltage divider is routed to an SMD jumper labelled as ADC SEL. This jumper can be used to redirect the measuring voltage either to the ADC for sampling or to the AN pin, so it can be used in an external circuitry (external ADC or some other form of measurement signal conditioning).\u003c\/p\u003e\n\n\u003cp\u003eThe MCP3551, a 22bit sigma-delta ADC from Microchip is used to sample the output of the sensor when selected by the ADC SEL jumper. This ADC converts the input voltage with a very high resolution of 22 bits and low noise, to a digital data, which can be obtained via the SPI interface of the \u003cstrong\u003eOzone 2 Click Board™\u003c\/strong\u003e. This ADC uses the reference voltage which is the same as the power supply voltage, and in this case, it is powered by 5V from the mikroBUS™ power rail. The reference voltage is used to calculate the value of the input voltage based on data received from the SPI bus, by using the following formula:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eV\u003csub\u003eSENS\u003c\/sub\u003e = DATA x V\u003csub\u003eREF\u003c\/sub\u003e \/ FS\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eV\u003csub\u003eREF\u003c\/sub\u003e is the same as the power supply for this circuit, which means V\u003csub\u003eREF\u003c\/sub\u003e = 5V, and the highest number written with 22 bits (FS) is 4,194,303. DATA is the 22-bit conversion value.\u003c\/p\u003e\n\n\u003cp\u003eAs already mentioned, the ADC uses a 5V power supply. Therefore, this board needs a level conversion circuitry in order to be interfaced with 3.3V MCUs. This Click board™ uses the TXB0106 IC, a 6-bit bidirectional level shifting IC from Texas Instruments, which is used to shift communication logic voltage levels from 5V to 3.3V. The voltage shift depends on the reference voltage on the VCCA pin, which can be selected with the SMD jumper, labelled as the VCCIO 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\u003eGas,Ozone\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eOzone 2 Click Board™\u003c\/strong\u003e can be used in different Ozone concentration detectors for air quality control, or for gas leak detection.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMQ131 sensor, MCP3551\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eOzone concentration 10-1000 ppm, communicates over the AN pin or ADC MCP3551, sensitivity Rs(in air)\/Rs(in 50 ppm O3)≥3, onboard potentiometer for calibration\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\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 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\u003eOzone 2 Click Board™\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003ecorresponds 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 pin\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\u003eSPI Chip Select\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eCS\u003c\/b\u003e\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\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\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\u003eSPI Data OUT\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+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\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\u003eVCCIO SEL.\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eLogic voltage level selection: left position 3V3, right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP2\u003c\/td\u003e\n            \u003ctd\u003eADC SEL.\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eAnalog signal routing selection: left position - signal is routed to the ADC, right position - signal is routed to the AN pin of mikroBUS™\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eVR1\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePotentiometer for adjusting the sensor sensitivity\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":37768409317565,"sku":"MIKROE-2767","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-ozone-2-click-board-30240174571709.jpg?v=1685193062"},{"product_id":"mikroe-2953-air-quality-3-click-board-uk","title":"Air Quality 3 Click Board™","description":"\u003cp\u003eThe\u003cstrong\u003e Air Quality 3 Click Board™\u003c\/strong\u003e is the air quality measurement device, which is able to output both equivalent CO2 levels and total volatile organic compounds (TVOC) concentration in the indoor environment. The Click board™ is equipped with the state-of-the-art air quality sensor IC, which has an integrated MCU and a specially designed metal oxide (MOX) gas sensor microplate, allowing for high reliability, fast cycle times and a significant reduction in the power consumption, compared to other MOX sensor-based devices. The Click board™ is also equipped with a temperature compensating element, which allows for increased measurement accuracy.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e outputs processed values for the equivalent CO2 levels (parts per million - ppm) and TVOC (parts per billion - ppb), based on raw gas readings, processed by the internal MCU. The values can be directly accessed via the I2C bus, which saves the software development time, allowing faster time to market. These features make the \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e a perfect solution for a wide range of both portable and stationary applications for measuring and monitoring the air quality in offices, storage areas, for home and building air conditioning automation and similar applications that require a reliable, low power eCO2 and TVOC level measurements.\u003c\/p\u003e\n\n\u003ch2\u003eHow Does The Air Quality 3 Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e is equipped with the CCS811, an advanced ultra-low-power digital gas sensor for monitoring the indoor air quality (IAQ), from AMS. This IC consists of an analogue section consisting of a MOX gas sensor, based on AMS unique micro-hotplate technology which allows high reliability, fast cycle times and very low power consumption; and the digital section, which consists of an embedded microcontroller (MCU) and an analogue to digital converter (ADC). The CCS811 sensor IC employs advanced algorithms to calculate the raw sensor data and output the equivalent CO2 and TVOC values. It utilizes the internal MCU for this purpose, reducing the payload on the host MCU.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"MikroE Sensors Air quality 3 click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/cms\/air-quality-3-click-inside-image-a.jpg\" src=\"https:\/\/www.mikroe.com\/img\/cms\/air-quality-3-click-inside-image-a.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eBecause of the nature of the MOX sensors, the CCS811 sensitivity will change over time, especially in early life use. The internal sensor resistance will change the most for the first 48 hours of operation. So, to achieve a proper operation of this sensor, it has to be calibrated during several different phases of its lifecycle. Since this step is important for achieving accurate IAQ results, it is strongly advised to be carefully studied from the CCS811 datasheet.\u003c\/p\u003e\n\n\u003cp\u003eThere are five operating modes available for the \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e:\u003c\/p\u003e\n\n\u003col\u003e\n    \u003cli\u003eMode 0 (idle mode), which uses the least power of all modes. The sensor stays dormant and no readings are made in this mode\u003c\/li\u003e\n    \u003cli\u003eMode 1 (constant power mode) the IAQ measurement is performed every second\u003c\/li\u003e\n    \u003cli\u003eMode 2 (pulse heating mode) the IAQ measurement is performed every 10 seconds\u003c\/li\u003e\n    \u003cli\u003eMode 3 (low power pulse heating mode) the IAQ measurement is performed every 60 seconds\u003c\/li\u003e\n    \u003cli\u003eMode 4 (constant power mode) the IAQ measurement is performed every 250ms\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eThese modes affect the power consumption of the \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003ek, as well as the frequency of the data sampling. Depending on the given conditions, the device can be set to be operated in any of these modes. However, it should be noted that the device should be set to idle mode for at least 10 minutes, before switching from a higher frequency measurement mode, to a lower frequency measurement mode. The TVOC and eCO2 values are calculated for modes 1, 2 and 3, while Mode 4 is intended to be used when external data processing is required, giving only raw value readings. The \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e communicates with the host MCU via the I2C bus. SCL and SDA pins of the CCS811 IC are routed to the corresponding mikroBUS™ pins, allowing easy and secure connection with the development system. There is yet another pin used with the I2C communication, that is not part of the standard I2C bus: the #WAKE pin has to be set to a LOW logic level before the communication is attempted. This pin is routed to the CS pin of the mikroBUS™. The I2C bus lines are equipped with pull-up resistors, so communication can be established as soon as the click board is installed on the mikroBUS™.\u003cbr\u003e\n\u003cbr\u003e\nThe least significant bit of the I2C address is routed to the external pin of the CCS811 IC and it can be set to either HIGH or a LOW logic level. This can be done by an onboard SMD jumper, labelled as ADDR. It is useful when more than one device is used on the same I2C bus. \u003c\/p\u003e\n\n\u003cp\u003eThe #RESET pin is used to reset the device and it has to be pulled to a LOW logic level for at least 20μs. It is pulled to a HIGH logic level by the onboard resistor and filtered by a capacitor, to prevent a random reset of the device. The #RESET of the CCS811 sensor IC is routed to the mikroBUS RST pin.\u003c\/p\u003e\n\n\u003cp\u003eThe #INT pin allows another powerful feature of the \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e to be used - a programmable interrupt request. This pin can be driven to a LOW state when there is data ready to be read via the I2C. It can also be programmed to be driven when the eCO2 measurement data exceeds the programmed threshold by the hysteresis value. This can be extremely useful for making an early CO2 warning system. Interrupts, in general, are very useful to avoid constant polling by the MCU, saving resources and energy that way. The #INT of the CCS811 sensor IC is routed to the mikroBUS INT pin.\u003c\/p\u003e\n\n\u003cp\u003eThe provided Click board™ library contains functions that can be used to read and configure the \u003cstrong\u003eAir Quality 3 Click Board™\u003c\/strong\u003e in a simple and comprehensive way. The provided example application demonstrates how to use these functions properly and can be used for future 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\u003eAir Quality ,Gas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eA perfect solution for various air conditioning systems, ventilation systems and other IoT applications where accurate, detailed and reliable air quality readings are required.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eCCS811, an advanced ultra-low-power digital gas sensor for monitoring indoor air quality (IAQ), from AMS.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eOnboard MCU processing, programmable interrupts, advanced MOX gas sensor technology, direct I2C reading of calculated values which allow fast time to market and rapid development\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\u003eAir Quality 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=\"\" 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\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\u003e\u003cstrong\u003eINT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eInterrupt\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eWake up\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eWKE\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\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\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    \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\u003eADDR\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eJumper for CCS811 I2C address selection\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":37768412594365,"sku":"MIKROE-2953","price":20.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-air-quality-3-click-board-30273406075069.jpg?v=1685201503"},{"product_id":"mikroe-3056-air-quality-5-click-board-uk","title":"Air Quality 5 Click Board™","description":"\u003cp\u003eThe\u003cstrong\u003e Air Quality 5 Click Board™ \u003c\/strong\u003eis a triple MOS sensor which can detect gas pollution for a number of different gases. The onboard sensor is specially designed to detect the pollution from automobile exhausts, as well as the gas pollution from the industrial or agricultural industry. The \u003cstrong\u003eAir Quality 5 Click Board™\u003c\/strong\u003e uses the MiCS-6814, a compact MOS sensor with three fully independent sensing elements in one package: RED sensor, OX sensor, and NH3 sensor. Each of these sensors reacts with the specific type of gases, providing gas readings that including carbon monoxide (CO), nitrogen dioxide (NO2), ethanol (C2H5OH), hydrogen (H2), ammonia (NH3), methane (CH4), propane (C3H8), and isobutane (C4H10). Measurement conversion is handled by the onboard 12bit ADC converter and it is available via the I2C interface.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing the MiCS-6814 MOS sensor with increased robustness for harsh environments, low noise 12bit onboard ADC converter, short preheat time requirement and reasonably high sensitivity, this Click board™ can be used for development of various environmental pollution measurement and detection applications, or various types of gas alarms in automotive industry or production\/manufacturing chambers with a high risk of gas poisoning.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Air Quality 5 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAir Quality 5 Click Board™\u003c\/strong\u003e contains the MiCS-6814, a compact triple MOS sensor from SGX Sensortech, with three fully independent sensors. The Click board™ also contains the ADS1015, a low-power 12bit ADC with Internal reference, and programmable comparator, from Texas Instruments. The MiCS-6814 sensor consists of three independent metal oxide sensors, heated by three separate heater structures. Chemicals which are absorbed by the metal oxide surface, change the resistive properties of the sensor. The typical baseline resistance may vary a lot from a sensor to a sensor and it can be affected by the measurement conditions, sensor aging, and several other factors. Therefore, it is recommended to periodically monitor the relative change of the sensing resistance against the baseline resistance. It allows development of applications which detect relative gas concentration changes, rather than measuring the absolute gas concentration values.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Click Boards Sensors Air quality 5 click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/images\/air-quality-5-click-inner.jpg\" src=\"https:\/\/www.mikroe.com\/img\/images\/air-quality-5-click-inner.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eAs mentioned, there are three sensors on the same die. Each of them reacts with a different type of gas. There is a RED sensor which reacts with the reducing gas agents, an OX sensor which reacts with the oxidizing gas agents, and lastly, a sensor which reacts with NH3. These sensors provide readings (in ppm) for eight different gasses, which are of interest to be monitored in the automotive, industry or agriculture polluted atmosphere.\u003c\/p\u003e\n\n\u003cp\u003eEvery heating structure is powered from the mikroBUS™ 5V power rail via the resistor, recommended by the manufacturer. This ensures the maximum life cycle of the device to be achieved since current ratings above the recommended would damage the sensors and heaters. It is recommended to pre-heat the sensors for at least 30 seconds before valid readings can be made. The longer the pre-heat period is, the more accurate the measurement becomes.\u003c\/p\u003e\n\n\u003cp\u003eThe changes of the sensor resistance are measured and sampled by the onboard ADC. The ADS1015 ADC has four multiplexed inputs, of which three are connected to each of the sensors. The ADC has an internal reference, it is very simple to operate, it offers inputs that can handle voltages across the sensors, and require a low number of external components. These attributes make it perfectly suitable for the \u003cstrong\u003eAir Quality 5 Click Board™\u003c\/strong\u003e. In addition, it is possible to change the slave I2C address of the device. This is done by using the SMD jumper, labeled as ADD SEL. This jumper allows selection of the I2C LSB bit state (0 or 1), allowing more than one Click board™ on the same I2C bus.\u003c\/p\u003e\n\n\u003cp\u003eThe ADS1015 IC also has a READY pin, which is used to signal or alert the host MCU that the conversion is ready for reading. This pin is routed to the mikroBUS™ INT pin and it is labeled as RDY. More information on how to configure and use this pin can be found in the ADS1015 datasheet.\u003c\/p\u003e\n\n\u003cp\u003eBoth 5V and 3.3V rails from the mikroBUS™ are used. The ADC is powered by 3.3V rail, but the sensor requires 5V rail to be used as well. Therefore, the \u003cstrong\u003eAir Quality 5 Click Board™\u003c\/strong\u003e requires both 3.3V and 5V pins to be supplied with the power.\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\u003eAir Quality ,Gas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eVarious environmental pollution measurement and detection applications, or various types of gas alarms in the automotive industry or production\/manufacturing chambers with a high risk of gas poisoning.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMiCS-6814, a compact triple MOS sensor from SGX Sensortech; ADS1015, a low-power 12bit ADC with Internal reference and programmable comparator, from Texas Instruments.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eIncreased robustness for harsh environments, low noise 12bit onboard ADC converter, reasonably high accuracy, three separate sensors on the same die for sensing of the number of different types of gases.\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,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\u003eAir Quality 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\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\u003eRDY\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eReady\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\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\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\u003eADD SEL\u003c\/td\u003e\n            \u003ctd\u003eADD SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eI2C address bit selection: left position 0, right position 1\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768417837245,"sku":"MIKROE-3056","price":37.8,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-air-quality-5-click-board-28849143382205.jpg?v=1685173784"},{"product_id":"alcohol-2-click-board-mikroe-3097-uk","title":"Alcohol 2 Click Board™","description":"\u003csection\u003e\n\u003csection\u003e\n\u003cp\u003eThe AFE IC provides a unified platform for many types of electrochemical sensors and as such, it packs a range of different features which simplify the use of various electrochemical sensors. The AFE IC supports gas sensitivity in a range from 0.5 nA\/ppm to 9500 nA\/ppm. Equipped with the SPEC ethanol sensor with resolution of 5ppb, the Click board™ can be used for various alcohol breathalyzer applications, alcohol breath testers, atmospheric ethanol presence detection applications, and similar.\u003c\/p\u003e\n\n\u003ch2 lang=\"en-us\" xml:lang=\"en-us\"\u003eHow Does The Alcohol 2 Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAlcohol 2 Click Board™\u003c\/strong\u003e is based on a SPEC Sensor™ are amperometric gas sensors, electrochemical sensors which generate a current proportional to the volumetric fraction of the gas. This current is converted and transformed into the voltage by the analog front-end IC (AFE), so it can be sampled by the MCU, or converted with the external A\/D converting circuits. The sensor used on this board is the 3SP-Ethanol-1000 from SPEC Sensors, which can sense ethanol concentration up to 1000ppm. The sensor has a very short response time, however the longer it is exposed to a particular gas, the more accurate data it can provide. This is especially true when calibration is performed. It should be noted that the sensor has a very high sensitivity to small particles of dust, condensed water, and other impurities, which might prevent gas to reach the sensor. It is advised to protect the sensor when used in critical applications. In ideal conditions, the lifetime of this sensor is indefinite, but in the real-life applications, the expected operating life is more than 5 years (10 years at 23 ± 3 ˚C; 40 ± 10 %RH).\u003cbr\u003e\n\u003cimg alt=\"Mikroe Sensors Alcohol 2 Click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/cms\/alcohol-2-click-inside-image.jpg\" src=\"https:\/\/www.mikroe.com\/img\/cms\/alcohol-2-click-inside-image.jpg\"\u003eAlthough very reliable and accurate, this sensor is great for building relative gas sensing applications. For example, it can detect increased levels of ethanol gas. However, when developing applications for the absolute gas concentration, the sensor needs to be calibrated and the measurement data needs to be compensated. Factors such as the humidity and temperature can affect measurements, sensor reaction curve to a specific measured gas (ethanol in this case) is not completely linear, and other gases might affect the measurement (cross-sensitivity to other gases). For this reason, a range of calibration routines needs to be done in the working environment conditions, in order to calculate the absolute gas concentration.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAlcohol 2 Click Board™\u003c\/strong\u003e uses the LMP91000, a configurable AFE potentiostat IC for low-power chemical sensing applications, from Texas Instruments. It provides the complete sensor solution, generating the output voltage which is proportional to the sensor current. A transimpedance amplifier (TIA) with the programmable gain is used to convert the current through the sensor, covering the range from 5μA to 750 μA, depending on the used sensor. The voltage between the referent electrode (RE) and the working electrode (WE) is held constant, with the bias set by the variable bias circuitry. This type of sensors performs best when a fixed bias voltage is applied. The sensor manufacturer recommends +100mV fixed bias for the sensor used on this Click board™. The bias voltage and the TIA gain can be set via the I2C registers. In addition, there is an embedded thermal sensor in the AFE IC, which can be used for the result compensation, if needed. It is available via the VOUT pin, as the analog voltage value in respect to GND.\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\nThe \u003cstrong\u003eAlcohol 2 Click Board™\u003c\/strong\u003e has two additional ICs onboard. The first one is the MCP3221, a 12-bit successive approximation register A\/D converter, from Microchip. The second IC is the OPA344, a single supply, rail to rail operational amplifier, from Texas Instruments. It is possible to use the onboard switch, labeled as AN SEL, to select the IC to which the VOUT pin from the LMP91000 AFE is routed. If the switch is in the ADC position, the VOUT pin will be routed to the input of the MCP3221 ADC. This allows the value of the voltage at the VOUT pin to be read via the I2C interface, as a digital information. When the switch is in the AN position, it will route the VOUT pin of the LMP91000 AFE IC to the input of the OPA344. The output of the OPA344 op-amp has a stable unity gain, acting as a buffer so that the voltage at the VOUT pin of the AFE can be sampled by the host MCU, via the AN pin of the mikroBUS™.\u003cbr\u003e\n \u003c\/p\u003e\n\n\u003cp lang=\"en-us\" xml:lang=\"en-us\"\u003eThe RST pin on the mikroBUS™ is routed to the MEMB pin of the LMP91000 and it is used to enable the I2C interface section, thus making it possible to use more than one chip on the same I2C bus. When it is driven to a LOW logic level, the I2C communication is enabled and the master device (host MCU) can issue a START condition. The RST pin should stay at LOW during the communication.\u003c\/p\u003e\n\n\u003cp lang=\"en-us\" xml:lang=\"en-us\"\u003eThe \u003cstrong\u003eAlcohol 2 Click Board™\u003c\/strong\u003e can work with both 3.3V and 5V. An SMD jumper labelled as VCC SEL can be moved to the desired position, allowing both 3.3V and 5V MCUs to be used with this Click 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\u003eAlcohol,Gas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eAlcohol 2 Click Board™\u003c\/strong\u003e can be used for various breathalyzer applications, alcohol breath testers, atmospheric ethanol presence detection applications, and similar\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eLMP9100SD, an integrated AFE for chemical sensing applications, MCP3221, a 12-bit SAR ADC from Microchip, OPA344, an operational amplifier from Texas Instruments, MCP1501, a high precision buffered reference, from Microchip\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eHigh accuracy and repeatability of the measurements, ability to obtain measurement data in both analog and digital form, low cross-sensing for other gases, rapid response time, long lifecycle of the ethanol sensor\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eAnalog,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\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 or 5V\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\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\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003ePower supply voltage selection\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSW1\u003c\/td\u003e\n            \u003ctd\u003eAN SEL\u003c\/td\u003e\n            \u003ctd\u003eRight\u003c\/td\u003e\n            \u003ctd\u003eMeasurement type selection\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eALCOHOL 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\u003eMeasurement range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e1000\u003c\/td\u003e\n            \u003ctd\u003eppm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eResponse time\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e180\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003es\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range (recommended)\u003c\/td\u003e\n            \u003ctd\u003e-20\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e40\u003c\/td\u003e\n            \u003ctd\u003e˚C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Humidity Range (non-condensing)\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e100\u003c\/td\u003e\n            \u003ctd\u003e% RH\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\u003eAlcohol 2 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 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\u003eAnalog 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\u003ePWM\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eI2C Enable\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\u003eFG\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\u003e \u003c\/h3\u003e\n\u003c\/section\u003e\n\u003c\/section\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768418132157,"sku":"MIKROE-3097","price":56.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-alcohol-2-click-board-30267448197309.jpg?v=1685201336"},{"product_id":"mikroe-3134-ndir-co2-click-board-uk","title":"NDIR CO2 Click Board™","description":"\u003cp\u003eDue to its large scale of integration, this sensor requires no external components involved in the measurement process, which improves the overall accuracy. Each of these sensors is factory tested and calibrated. The sensor also offers several I\/O pins for simplified configuration and operation, saving the MCU from polling the registers. A specialized ALARM pin offers the possibility to trigger an MCU interrupt if the programmed CO2 concentration value is exceeded. These features make the \u003cem\u003e\u003cstrong\u003eNDIR CO2 Click Board™\u003c\/strong\u003e\u003c\/em\u003e a perfect solution for various CO2 measuring applications, such as air conditioning applications, indoor air quality control applications, automatic fresh air exchange and venting systems, and similar.\u003c\/p\u003e\n\n\u003ch2\u003eHow Does The NDIR CO2 Click Board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eThe main component on the \u003cstrong\u003eNDIR CO2 Click Board™\u003c\/strong\u003e is the CDM7160, a pre-calibrated single light source, dual wavelength, CO2 sensing system, by Figaro Engineering, INC. Its light source emits the light, which is detected by two IR sensors. One light sensor is placed behind the filter which allows only a part of the IR spectrum affected by the CO2 gas to pass through, while the second sensor is placed behind the filter which passes the IR spectrum of the light which is not affected by the CO2 gas. This forms a kind of a differential input for the sensor - an integrated MCU will process the received data by differentiating these readings. This allows the absolute value of the CO2 gas concentration to be obtained, but also removes any influences of particles and other disturbances, as they affect both sensors equally. This allows consistent readings over various temperatures, in various environments, including areas rich with corrosive gases (SO2, H2S…), and over a longer period of times (aging).\u003cbr\u003e\n\u003cbr\u003e\n\u003cimg alt=\"MikroE Sensors NDIR CO2 click\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/cms\/ndir-co2-click-inside-image.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe CDM7160 sensor has the ability to output data in two ways: depending on the status of the MSEL pin, it can use either a UART or I2C communication interface. If this pin is pulled to a LOW logic level, the I2C interface will be selected after the CDM7160 reset cycle. Otherwise, the UART interface will be selected. Since the communication pins are shared between the interfaces (SCL\/RX and SDA\/TX), they need to be switched to the corresponding pins of the mikroBUS™ whenever the different type of communication is used. Therefore, the Click board™ has a section with three small SMD slide switches labelled as COM SEL. Positioning all three switches to the LEFT position will select the I2C interface while the RIGHT position will select the UART interface. When the I2C interface is selected, an additional pin is available to set up the I2C address of the device. This pin determines the LSB of the I2C slave address and when it is pulled to a LOW logic level, this bit becomes 0. This allows up to 2 different devices to be connected to the same I2C bus. This pin is routed to another SMD slide switch, labelled as the ADD SEL.\u003c\/p\u003e\n\n\u003cp\u003eIt is possible to perform two types of calibration for this sensor: zero calibration and the background calibration. The zero calibration is performed in the atmosphere with the CO2 concentration of 0 ppm, while the background calibration is performed in the atmosphere with a nominal CO2 value (400 ppm). Since the sensor is influenced by the sea level and the atmospheric pressure, these calibrations should be performed whenever these conditions are changed. This will allow an increased accuracy of the CO2 concentration readings. The CDM7160 sensor offers a pin labelled as CAL, for an easy calibration: if the CAL pin is pulled to a LOW logic level for about 2 to 11 seconds, a background calibration will be performed. If pulled to a LOW logic level for more than 12 seconds, the zero calibration will be performed. This pin should remain HIGH during normal operation. An internal pull-up resistor ensures that the pin is always HIGH if it remains floating. This pin is routed to the mikroBUS™ CS pin, labelled as CAL\u003c\/p\u003e\n\n\u003cp\u003eThe ALERT pin of the CDM7160 sensor is used to trigger an interrupt on the host MCU. By default, it will trigger an interrupt if the CO2 concentration exceeds 1000ppm. The interrupt will be cleared if the concentration drops below 900ppm. These settings can be changed by writing values to the corresponding ALHI and ALLO registers (upper and lower threshold registers). The ALERT pin of the CDM7160 sensor is routed to the mikroBUS™ INT pin.\u003c\/p\u003e\n\n\u003cp\u003eBUSY pin of the sensor provides means to save the sensor from polling sensor registers in order to verify if the device is ready for the communication. By setting an interrupt for the BUSY pin, the MCU can be automatically triggered only when the sensor is ready to accept a new command. A logic LOW level signals the MCU that the sensor is unable to accept a new command. The sensor might be unavailable while processing the data internally, for about 0.3 seconds. This pin is routed to the mikroBUS™ RST pin, labelled as BSY on the Click board™.\u003c\/p\u003e\n\n\u003cp\u003eBesides UART and I2C communication, the sensor offers a 1KHz PWM signal of with the duty cycle which depends on the CO2 concentration (0 to 5000 ppm of CO2). The Click board™ is equipped with an operational amplifier, which averages the PWM signal, offering analog DC voltage (0 to 5V) on its output, directly proportional to the pulse width of the PWM signal. By switching the SMD jumper labelled as AN ENABLE to EN position, the voltage at the output of this operational amplifier becomes available at the AN pin of the mikroBUS™. By default, the jumper is soldered to DIS position. Note that the full-scale voltage on the operational amplifier output is 5V (5000 ppm of CO2 equals 5V)\u003c\/p\u003e\n\n\u003cp\u003eTo allow communication with 3.3V MCUs, two additional ICs are used: one is the PCA9306, which translates voltage levels of the I2C signals, while the second IC is the TXB0106, used to translate voltage levels of the remaining IC pins, including the UART. Both of these ICs are used on many other designs, and are proven to be very reliable solution.\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\u003eGas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eNDIR CO2 Click Board™\u003c\/strong\u003e is a perfect solution for various CO2 measuring applications, such as air conditioning applications, indoor air quality control applications, automatic fresh air exchange and venting system applications, and similar.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eCDM7160, a CO2 sensing system, by Figaro Engineering, INC; PCA9306, a dual bidirectional I2C bus voltage translator; TXB0106, a 6bit bidirectional level shifter, both from Texas Instruments; MCP606, a rail-to-rail op-amp by Microchip\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eNDIR sensor which uses dual IR sensors which allow differential reading of CO2 concentration, provides absolute CO2 gas concentration levels, long term stability, accuracy and immunity to interferences and pollution, offers several I\/O interface types.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eAnalog,I2C,UART\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\u003eNDIR CO2 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 OUT\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eAN\u003c\/b\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\u003eBusy status\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eBSY\u003c\/b\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\u003cb\u003eINT\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eAlarm OUT\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCalibration\u003c\/td\u003e\n            \u003ctd\u003e\u003cb\u003eCAL\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\u003e\u003cb\u003eTX\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eUART TX\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\u003cb\u003eRX\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eUART RX\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\u003cb\u003eSCL\u003c\/b\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\u003cb\u003eSDA\u003c\/b\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\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\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\u003eSW1 - SW3\u003c\/td\u003e\n            \u003ctd\u003eADD SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eCommunication protocol selection: left position I2C, right position UART\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSW4\u003c\/td\u003e\n            \u003ctd\u003eADD SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eI2C address LSB selection: left position 0, right position 1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eAN ENABLE\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eAN pin output selection: left position AN disabled, right position AN enabled\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eH-BRIDGE 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\u003eType\u003c\/th\u003e\n            \u003cth\u003eMax\u003c\/th\u003e\n            \u003cth\u003eUnit\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eVoltage at the AN pin (if enabled)\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMeasurement range\u003c\/td\u003e\n            \u003ctd\u003e300\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e5000\u003c\/td\u003e\n            \u003ctd\u003eppm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eAveraging interval\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003es\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":37768418918589,"sku":"MIKROE-3134","price":104.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-ndir-co2-click-board-30638134591677.jpg?v=1685076763"},{"product_id":"mikroe-3318-alcohol-3-click-board-uk","title":"Alcohol 3 Click Board™","description":"\u003csection\u003e\n\u003cp\u003eThe \u003cstrong\u003eAlcohol 3 Click Board™\u003c\/strong\u003e contains the required resistances used to form a voltage divider with the sensor, as well as the accurate SAR type ADC with a 12-bit resolution which allows the voltage to be converted, using 5V from the mikroBUS™ rail as a voltage reference. Featuring the MiCS-5524, a robust and reliable gas sensor that requires a minimal number of additional components, the MCP3221, an accurate 12-bit ADC by Microchip, proven in many Click board™ designs so far, Alcohol 3 click represents an ideal solution for the rapid development of all kinds of breathalyzer applications, gas leakage applications, fire detection applications, CO detectors, and similar reducing gasses detecting applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The Alcohol 3 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAlcohol 3 Click Board™\u003c\/strong\u003e is equipped with the MiCS-5524 sensor, a compact MOS sensor from SGX Sensortech. This sensor consists of a micromachined metal oxide semiconductor diaphragm, with an integrated heating resistor. The resistor produces heat which catalyzes the reaction, which in turn affects the electrical resistance of the oxide layer itself. The temperature of the heater is quite high: it is in the range from 350 °C to 550 °C. After the initial preheating period, the sensor can detect gas changes in time intervals below two seconds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Mikroe Click Boards Sensors Alcohol 3 click\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/images\/Alcohol-3-click-inner-img.jpg\" src=\"https:\/\/www.mikroe.com\/img\/images\/Alcohol-3-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe resistance of the MiCS-5524 sensor does not change linearly with the gas concentration, so a proper calibration must be performed prior to using it for absolute gas concentration measurement applications. The impedance changes the most when used with low gas concentrations. As the atmosphere gets saturated with gas, the impedance changes slower. This should be taken into an account, especially when developing applications for estimating blood alcohol content (BAC) from a breath sample (also known as breathalyzers).\u003c\/p\u003e\n\n\u003cp\u003eThe MiCS-5524 sensor is a simple device: it has only four connections. Two pins are the connections of the internal heating element, while the other two pins are the MOS sensor connections. The application is reduced to calculating a proper resistor for the voltage divider. The datasheet of the MiCS-5524 sensor offers typical values for its resistance when used in clean air (artificial conditions). The sensitivity is then expressed as the ratio between the resistance of the sensor in clean air and resistance at a concentration of 60 ppm CO.\u003c\/p\u003e\n\n\u003cp\u003eThe middle tap between the sensor (as a resistor) and the fixed resistance is used to provide an output voltage. It directly depends on the resistance of the sensor, allowing it to be used as the input into the MCP3221, a low-power 12-bit A\/D converter with an I2C interface, from Microchip. This ADC allows the output voltage to be translated into digital information, which can be accessed over the I2C pins on the mikroBUS™ socket. By using the power supply voltage as the voltage reference for the conversion, this ADC further reduces the complexity of the design, still offering a good conversion quality, thanks to its low noise input. Due to the sensor's inert nature, this ADC is more than fast enough, although it can provide up to 22.3 Ksps when operated in the I2C Fast mode.\u003c\/p\u003e\n\n\u003cp\u003eThe I2C communication voltage level can be adjusted so that the Click board™ can be used with both 3.3V and 5V MCUs. The provided SMD jumper labelled as VCC SEL can be used to select the desired voltage level. However, the Click board™ requires +5V for a proper operation, regardless of the logic voltage level selection jumper.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\n\u003csection\u003e\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eAlcohol,Gas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eIt can be used for various alcohol breath tester applications, early fire and gas leakage warning applications, VOC concentration warning applications, and similar\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMiCS-5524 sensor, a compact MOS sensor from SGX Sensortech; MCP3221, a low-power 12-bit A\/D converter with I2C interface, from Microchip\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eRobust and reliable MOS sensor, a high-quality 12-bit ADC from Microchip onboard, can detect a range of different redux gasses, ideal for a breathalyzer application development, etc\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\u003c\/section\u003e\n\n\u003ch3\u003ePinout Diagram\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on the \u003cstrong\u003eAlcohol 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=\"\" 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\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\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\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\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003ePower supply voltage selection\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e\n\u003c\/section\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768421572797,"sku":"MIKROE-3318","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-alcohol-3-click-board-30267420541117.jpg?v=1685207999"},{"product_id":"co-2-click-board-mikroe-3196-uk","title":"CO 2 Click Board™","description":"\u003cp\u003eThe AFE IC provides a unified platform for many types of electrochemical sensors and as such, it packs a range of different features which simplify the use of various electrochemical sensors. The AFE IC supports gas sensitivity in a range from 0.5 nA\/ppm to 9500 nA\/ppm. Equipped with the SPEC CO sensor with the resolution of 100ppb, the \u003cstrong\u003eCO 2 Click Board™\u003c\/strong\u003e can be used for various air quality applications, air purification and conditioning, carbon-monoxide warning applications, and similar.\u003c\/p\u003e\n\n\u003ch2 lang=\"en-us\" xml:lang=\"en-us\"\u003eHow Does The CO 2 Click board™ Work?\u003c\/h2\u003e\n\n\u003cp\u003eSPEC Sensor™ is the technology used in amperometric gas sensors, the electrochemical sensors which generate a current proportional to the volumetric fraction of the gas. This current is converted and transformed into the voltage by the analog front-end IC (AFE), so it can be sampled by the MCU or converted with the external A\/D converting circuits. The sensor used on this board is the 3SP CO 1000, a carbon monoxide (CO) gas sensor, made by SPEC sensors, which can sense CO concentration up to 1000ppm. The sensor has a very short response time, however the longer it is exposed to a particular gas, the more accurate data it can provide. This is especially true when calibration is performed. It should be noted that the sensor has a very high sensitivity to small particles of dust, condensed water, and other impurities, which might prevent gas to reach the sensor. It is advised to protect the sensor when used in critical applications. In ideal conditions, the lifetime of this sensor is indefinite, but in a real-life application, the expected operating life is over 5 years (10 years at a temperature of 23 ± 3 ˚C and humidity of 40 ± 10% RH).\u003c\/p\u003e\n\n\u003cp lang=\"en-us\" xml:lang=\"en-us\"\u003e\u003cimg alt=\"CO 2 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/cms\/co-2-click-inside-image_2.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eAlthough very reliable and accurate, this sensor is great for building relative gas sensing applications as well. For example, it can detect an increased level of CO gas, which is very hard to detect due to being tasteless, odorless, and colorless. However, when developing applications for the absolute gas concentration, the sensor needs to be calibrated and the measurement data needs to be compensated. Factors such as the humidity and temperature can affect measurements, the sensor-reaction curve to a specific measured gas (carbon-monoxide in this case) is not completely linear, and other gases might affect the measurement (cross-sensitivity to other gases). For this reason, a range of calibration routines has to be done in the conditions of the working environment, in order to calculate the absolute gas concentration.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eCO 2 Click Board™\u003c\/strong\u003e uses the LMP91000, a configurable AFE potentiostat IC for low-power chemical sensing applications, from Texas Instruments. It provides the complete sensor solution, generating the output voltage which is proportional to the sensor current. A transimpedance amplifier (TIA) with the programmable gain is used to convert the current through the sensor, covering the range from 5μA to 750 μA, depending on the sensor used. The voltage between the referent electrode (RE) and the working electrode (WE) is held as a constant, with the bias set by the variable bias circuitry. This type of sensors performs best when a fixed bias voltage is applied. The sensor manufacturer recommends -200mV fixed bias for the sensor used on this Click board™. The bias voltage and the TIA gain can be set via the I2C registers. In addition, there is an embedded thermal sensor in the AFE IC, which if needed, can be used for the result compensation. It is available via the VOUT pin, as the analog voltage value in respect to GND.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eCO 2 Click Board™\u003c\/strong\u003e has two additional ICs onboard. The first one is the MCP3221, a 12-bit successive approximation register A\/D converter, from Microchip. The second IC is the OPA344, a single supply, rail-to-rail operational amplifier, manufactured by Texas Instruments. It is possible to use the onboard switch, labeled as AN SEL, to select the IC to which the VOUT pin from the LMP91000 AFE is routed. If the switch is in the ADC position, the VOUT pin will be routed to the input of the MCP3221 ADC. This allows the value of the voltage at the VOUT pin to be read as a digital information via the I2C interface. When the switch is in the AN position, it will route the VOUT pin of the LMP91000 AFE IC to the input of the OPA344. The output of the OPA344 op-amp has a stable unity gain, acting as a buffer so that the voltage at the VOUT pin of the AFE can be sampled by the host MCU, via the AN pin of the mikroBUS™.\u003c\/p\u003e\n\n\u003cp\u003eThe RST pin on the mikroBUS™ is routed to the MEMB pin of the LMP91000 and it is used to enable the I2C interface section, making it possible to use more than one chip on the same I2C bus. When it is driven to the LOW logic level, the I2C communication is enabled and the master device (host MCU) can issue the START condition. The RST pin should stay at the LOW during the communication.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eCO 2 Click Board™\u003c\/strong\u003e can work both with 3.3V and 5V. An SMD jumper labeled as VCC SEL can be moved to the desired position, allowing both 3.3V and 5V MCUs to be used with this Click 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\u003eGas, CO\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eIt can be used for various air quality applications, air purification and conditioning, carbon-monoxide warning applications, and similar.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003e3SP CO 1000, a CO gas sensor, by SPEC sensors, LMP9100SD, an integrated AFE for chemical sensing applications, MCP3221, a 12-bit SAR ADC from Microchip, OPA344, an operational amplifier from Texas Instruments, MCP1501, a high precision buffered reference, from Microchip\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eHigh accuracy and repeatability of the measurements, ability to obtain measurement data in both analog and digital form, low cross-sensing for other gases, rapid response time, long lifecycle of the CO sensor\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eAnalog,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\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 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\u003eCO 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    \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\u003eAnalog 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\u003eNC\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        \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\u003e\n\u003cbr\u003e\nONBOARD JUMPERS AND SETTINGS\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\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\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003ePower supply voltage selection\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSW1\u003c\/td\u003e\n            \u003ctd\u003eAN SEL\u003c\/td\u003e\n            \u003ctd\u003eRight\u003c\/td\u003e\n            \u003ctd\u003eMeasurement type selection\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default Title","offer_id":37768423112893,"sku":"MIKROE-3196","price":49.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/6931\/8333\/products\/mikroelektronika-d-o-o-click-board-co2-click-board-30265119342781.jpg?v=1685199894"},{"product_id":"no2-2-click-board-mikroe-3700-uk","title":"NO2 2 Click Board™","description":"\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eNO2 2 Click Board™\u003c\/strong\u003e\u003c\/em\u003e contains the required resistances used to form a voltage divider with the sensor, as well as the accurate SAR type ADC with 12-bit resolution which allows the voltage to be converted, using 5V from the mikroBUS rail as a voltage reference. Featuring the MiCS-2714, a robust and reliable gas sensor which requires a minimal number of additional components, the MCP3201, an accurate 12-bit ADC by Microchip, proven in many Click Board™ designs so far, the \u003cstrong\u003eNO2 2 Click Board™\u003c\/strong\u003e represents an ideal solution for a rapid development in all kinds of harsh environments of applications such as gas leakage applications, fire detection applications, CO detectors, and similar reducing gasses detecting applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The NO2 2 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eNO2 2 Click Board™\u003c\/strong\u003e is equipped with the MiCS-2714 sensor, a compact MOS sensor from SGX Sensortech. This sensor consists of a micromachined metal oxide semiconductor diaphragm, with an integrated heating resistor. The resistor produces heat which catalyzes the reaction, which in turn affects the electrical resistance of the oxide layer itself. The temperature of the heater is quite high: it is in the range from 350 °C to 550 °C. After the initial preheating period, the sensor can detect gas changes in time intervals below two seconds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"NO2 2 Click Board™\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/NO2-2-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe resistance of the MiCS-2714 sensor does not change linearly with the gas concentration, so a proper calibration must be performed prior to using it for absolute gas concentration measurement applications. The impedance changes the most when used with low gas concentrations. As the atmosphere gets saturated with gas, the impedance changes slower.\u003c\/p\u003e\n\n\u003cp\u003eThe MiCS-2714 sensor is a simple device: it has only four connections. Two pins are the connections of the internal heating element, while the other two pins are the MOS sensor connections. The application is reduced to calculating a proper resistor for the voltage divider. The middle tap between the sensor (as a resistor) and the fixed resistance is used to provide an output voltage. It directly depends on the resistance of the sensor, allowing it to be used as the input into the MCP3201, a low-power 12-bit A\/D converter with I2C interface, from Microchip. This ADC allows the output voltage to be translated into a digital information, which can be accessed over the I2C pins on the mikroBUS socket. By using the power supply voltage as the voltage reference for the conversion, this ADC further reduces the complexity of the design, still offering a good conversion quality, thanks to its low noise input. Due to the sensor's inert nature, this ADC is more than fast enough, although it can provide up to 22.3 ksps when operated in the I2C Fast mode.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eNO2 2 Click Board™\u003c\/strong\u003e is designed to be operated only with 5V logic level. A proper logic voltage level conversion should be performed before the Click Board™ is used with MCUs with logic levels of 3.3V.\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\u003eGas,NO2\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eIt can be used for various applications, such as gas leakage applications, fire detection applications, CO detectors, and similar reducing gasses detecting applications.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eMiCS-2714 - a compact metal oxide (MOS) sensor from SGX Sensortech\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"even\"\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eRobust and reliable MOS sensor, a high-quality 12-bit ADC from Microchip onboard, can detect a range of different redux gasses, ideal for a various application development, etc\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr class=\"odd\"\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eSPI\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\u003eS (28.6 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\u003e5V\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 of the \u003cstrong\u003eNO2 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 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\u003e\u003cstrong\u003ePHT\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePreheating\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\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e \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            \u003ctd\u003e \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            \u003ctd\u003e \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSPI Data Out\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            \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\u003e \u003c\/td\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\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\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 class=\"section-title\"\u003eNO2 2 Click Board™ ELECTRICAL SPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable class=\"additional-info-tables-gray\"\u003e\n    \u003cthead\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    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMeasurement range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eppm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eResponse time\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e200\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003es\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range (recommended)\u003c\/td\u003e\n            \u003ctd\u003e-30\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e85\u003c\/td\u003e\n            \u003ctd\u003e˚C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Humidity Range (non-condensing)\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e95\u003c\/td\u003e\n            \u003ctd\u003e% RH\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":37768431960253,"sku":"MIKROE-3700","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-no2-2-click-board-30238193287357.jpg?v=1685032309"},{"product_id":"mikroe-4385-raq-click-board-uk","title":"RAQ Click Board™","description":"\u003ch3\u003eHow Does The RAQ Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eRAQ Click Board™\u003c\/strong\u003e is based on the ZMOD4450, a gas sensor module designed to detect typical gases inside refrigeration applications associated with food ripening or rotting from Renesas Electronics Corporation. The ZMOD4450 is not selective to an individual gas, yet it detects a variety of volatile organic and sulfur compounds. It is also able to detect some safety-relevant toxic gases. However, this sensor is not provided to detect these interferants reliably, and it, therefore, is not approved for use in any safety-critical or life-protecting applications. The response time for a gas stimulation is within a few seconds, depending on the gas and its concentration. An active or direct airflow onto the sensor module is not necessary since the diffusion of ambient gas does not limit the sensor response time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"raq click inner\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/raq-click-inner.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe ZMOD4450 will respond to typical refrigeration gases immediately upon Start-Up. However, a conditioning period of 48 hours is recommended in a refrigeration environment to improve stability and get maximum performance, as the module algorithm can learn about the refrigeration environment over time. Users who require an absolute measurement with the maximum achievable accuracy can re-calibrate the sensor with a known organic compound, which enables an absolute accuracy of ±15%. With the ZMOD4450's low operating current consumption, the sensor is an excellent choice for low-voltage and low-power battery applications.\u003c\/p\u003e\n\n\u003cp\u003eFor some environments, an interference response to siloxanes is of concern, but the ZMOD4450 gas sensor has been proven to be resistant to siloxanes. A maximum potential lifetime exposure has been simulated in all ZMOD4450 operation modes by applying the chemicals D4 (octamethylcyclotetrasiloxane) and D5 (decamethylcyclopentasiloxane) in high concentration for several hundred hours.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eRAQ Click Board™\u003c\/strong\u003e communicates with MCU using the standard I2C 2-Wire interface with a maximum frequency up to 100kHz in the Standard Mode and up to 400kHz in the Fast Mode. The measurement results are exchanged via an I2C interface with the user's MCU, which processes the data to determine the levels of gases present and to indicate the likelihood of food spoilage. Built-in nonvolatile memory (NVM) stores the configuration and provides space for arbitrary user data. Additional functionality such as hardware reset for ZMOD4450 and a programmable interrupt signal are provided and routed at RST and INT pins of the mikroBUS™ socket labelled as RST and INT.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eRAQ 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, the Click board™ comes equipped with a library that contains easy to use 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\u003eGas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eRAQ Click Board™\u003c\/strong\u003e can be used for various applications like refrigerator systems control or as monitors for fruit and vegetable quality, shipping, and storage conditions.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eRAQ Click is based on the ZMOD4450, a gas sensor module designed to detect typical gases inside refrigeration applications associated with food ripening or rotting from Renesas Electronics Corporation.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eLow power consumption, excellent choice for low-voltage and low-power battery applications, measurement of gases associated with food ripening and storage, configurable methods of operation, built-in nonvolatile memory, 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\u003eRAQ 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\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\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\u003eRAQ 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\u003e1.7\u003c\/td\u003e\n            \u003ctd\u003e3.3\u003c\/td\u003e\n            \u003ctd\u003e3.6\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eEthylene Measurement Range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003eppm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eDimethyl sulfide Measurement Range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e180\u003c\/td\u003e\n            \u003ctd\u003eppb\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eTrimethylamine Measurement Range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e600\u003c\/td\u003e\n            \u003ctd\u003eppb\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHumidity Range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e95\u003c\/td\u003e\n            \u003ctd\u003e%RH\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e+25\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":37768485109949,"sku":"MIKROE-4385","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-raq-click-board-28847839510717.jpg?v=1685128614"},{"product_id":"mikroe-4904-air-quality-8-click-board-uk","title":"Air Quality 8 Click Board™","description":"\u003ch3\u003eHow Does The Air Quality 8 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eAir Quality 8 Click Board™\u003c\/strong\u003e\u003c\/em\u003e uses the ZMOD4510, a pre-calibrated digital sensor designed for reliable indoor and outdoor air quality detection from Renesas. This sensor comes with selective ozone measurement capabilities (NO2 and O3) and allows improved energy efficiency with less than 23mW of power consumption in continuous operation without compromising air quality. It also features electrical and gas calibration, proven MOx material, digital interface, siloxane resistance, and high-sensitivity and long-term stability allowing ppb detection limits. It covers extended operating humidity and temperature ranges from 5 to 90%RH and from -20°C to 50°C with ozone and nitrogen dioxide measurement ranges from 20 up to 500ppb.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"Air quality Click inner\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/images\/Air_quality_Click_inneri2.jpg\" src=\"https:\/\/www.mikroe.com\/img\/images\/Air_quality_Click_inneri2.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe ZMOD4510 has a gas-sense element, consisting of a heater element on a silicon-based MEMS structure, a metal-oxide (MOx) chemiresistor, and a CMOS signal conditioning IC that controls the sensor temperature and measures the MOx resistance, which is a function of the gas concentration. It has two operational modes. The first mode of operation allows a general measurement of Air Quality, including the non-selective measurement of nitrogen dioxide (NO2) and ozone (O3). The second mode of operation allows the selective measurement of ozone (O3) featuring Ultra-Low Power with an average consumption of 0.2mW during its fast sample rate of 2 seconds.\u003c\/p\u003e\n\n\u003cp\u003eIt detects typical gases based on studies and international standards for outdoor air quality and uses a sequence of applied temperatures to sample the air and report an Air Quality Index (AQI). The sensor does not require an active or direct airflow onto the sensor module because diffusion of ambient gas does not limit the sensor response time. The ZMOD4510 can also detect safety-relevant gases; however, the sensor module is not designed to detect these interferants reliably. Therefore, it is not approved for use in any safety-critical or life-protecting applications.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAir Quality 8 Click Board™\u003c\/strong\u003e communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz. In addition, it also possesses other features such as reset pin routed to the RST pin on the mikroBUS™ socket, which with a low logic level puts the module into a Reset state, an additional interrupt signal, routed on the INT pin of the mikroBUS™ socket labeled as INT, indicating the status of measurement process itself.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAir Quality 8 Click Board™\u003c\/strong\u003e can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing 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\u003eAir Quality ,Gas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eAir Quality 8 Click Board™ c\u003c\/strong\u003ean be used for detecting unhealthy conditions in outdoor air, such as personal air-quality monitor, HVAC, and other various air quality-related applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eZMOD4510 - pre-calibrated digital sensor designed for reliable indoor and outdoor air quality detection from Renesas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003ePre-calibrated, reliable for outdoor and indoor air quality detection, low power consumption, MOx material, digital I2C output, siloxane resistance, high-sensitivity, long term stability, 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\u003eAir Quality 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    \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\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\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\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\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    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAIR QUALITY 8 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\u003eMeasurement Range\u003c\/td\u003e\n            \u003ctd\u003e20\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e500\u003c\/td\u003e\n            \u003ctd\u003eppb\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHumidity Range\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e90\u003c\/td\u003e\n            \u003ctd\u003e\u0026amp;RH\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n            \u003ctd\u003e-20\u003c\/td\u003e\n            \u003ctd\u003e+25\u003c\/td\u003e\n            \u003ctd\u003e+50\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":42176384598239,"sku":"MIKROE-4904","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-air-quality-8-click-board-36274036965599.jpg?v=1684965889"},{"product_id":"mikroe-4725-co2-click-board-uk","title":"CO2 Click Board™","description":"\u003ch3\u003eHow Does The CO2 Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eCO2 Click Board™\u003c\/strong\u003e\u003c\/em\u003e as its foundation uses the STC31, a gas concentration sensor for high range, accurate CO₂ measurements designed for high-volume applications from Sensirion. The STC31 is based on a revolutionized thermal conductivity measurement principle, which results in superior repeatability and long-term stability. By relying on the thermal conductivity technology, the sensor offers an ultra-low power consumption, making the STC31 the perfect choice for applications where reliability is key.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"CO2 Click inner\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/CO2_Click_inner.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe accuracy of the STC31 is 0.5 vol%, and ±3% of the measured value, while the sensor response time is faster than 1 second. The outstanding performance of these sensors is based on Sensirion's patented CMOSens® Technology, which combines the sensor element, signal processing, and digital calibration on a small CMOS chip. The well-proven CMOSens® Technology represents the ideal choice for demanding and cost-sensitive OEM applications.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eCO2 Click Board™\u003c\/strong\u003e communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency up to 100kHz, Fast Mode up to 400kHz, and Fast Mode Plus up to 1MHz. Besides, it also allows the choice of the three least significant bits of its I2C slave address by positioning the SMD jumper labelled as ADDR SEL to an appropriate position providing the user with a choice of 4 I2C Slave addresses.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eCO2 Click Board™\u003c\/strong\u003e can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the I2C communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use 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\u003eGas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eCO2 Click Board™\u003c\/strong\u003e be used for health, environmental, industrial, residential monitoring of high CO₂ concentrations and applications where reliability is crucial\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eSTC31 - gas concentration sensor for high range, accurate CO₂ measurements designed for high-volume applications from Sensirion\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eLow power consumption, high reliability and long-term stability, best signal-to-noise ratio, industry-proven technology with a track record of more than 15 years, high process capability, 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\u003eCO2 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\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\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\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eLogic Level Voltage Selection 3V3\/5V: Left position 3V3, Right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP2\u003c\/td\u003e\n            \u003ctd\u003eADDR SEL\u003c\/td\u003e\n            \u003ctd\u003eLower\u003c\/td\u003e\n            \u003ctd\u003eI2C Address Selection: Left position 0x2C, Right position 0x2A, Upper position 0x2B, Lower position 0x29\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCO2 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\u003e3.3\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSelectable Measurement Range (N2 \/ Air)\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e25\/100\u003c\/td\u003e\n            \u003ctd\u003evol%\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eAccuracy\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e±0.5\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e%\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eResolution\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ebit\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n            \u003ctd\u003e-20\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 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