Turbidity Click Board™

How Does The Turbidity Click Board™ Work?

The Turbidity Click Board™ is an adapter that simplifies the interface of a Turbidity Sensor with a host MCU. This Click board™ represents a small-size PCB that can be connected to the mikroBUS™ socket like any other Turbidity Click Board™, with a 1x3 2.5mm pitch vertical type board connector placed on itself used for the turbidity sensor connection. Each of the connector pins corresponds to a pin of the turbidity sensor. Each of the connector pins corresponds to the turbidity sensor pins connected to this same connector via an additional 3-wire cable for the Turbidity Click Board™, specially made for this purpose. This way allows easy pin access and manipulation while retaining a perfect connection quality at all times.

The Turbidity Click Board™ allows users to upgrade their projects with a sensor that senses the cloudiness or haziness of a liquid caused by large numbers of individual particles invisible to the naked eye. The turbidity level is determined based on a comparison between clean water measurements and later based on the used water at the end of usage; more precisely, the turbidity sensor measures the amount of transmitted light to determine the turbidity of the liquid. As well as turbidity, this sensor also measures liquid temperature.

The analog output voltage of the Turbidity Sensor can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip, using a 2-wire I2C compatible interface. Using MCP3221 and I2C interface, data transfers at rates of up to 100kbit/s in the Standard and 400kbit/s in the Fast Mode.

The Turbidity Click Board™ 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.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout of the Turbidity Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
NC	1	AN	PWM	16	NC
NC	2	RST	INT	15	NC
NC	3	CS	RX	14	NC
NC	4	SCK	TX	13	NC
NC	5	MISO	SCL	12	SCL	I2C Clock
NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

ONBOARD SETTINGS AND INDICATORS

TURBIDITY CLICK ELECTRICAL SPECIFICATIONS