HOW DOES IT WORK?

Water Detect 2 Click is based on the OPB350L250, a tube liquid sensor from TT Electronics. It consists of an LED and a phototransistor, where the phototransistor reads the light of an LED that passes through a clear tube. Depending on the liquid that passes through, you can distinguish light from dark liquid, no liquid presence, bubbles in the liquid that passes through the tube, or even no tube presence at all. You will have to identify the typical current values for each situation, where the ratio between the different states allows the acknowledgment of different conditions. In addition, the sensor itself comes in an opaque plastic housing that enhances ambient light rejection. The housing "clicks" around the tube, allowing a secure and tight connection.

Water Detect 2 Click uses the MCP6022, a rail-to-rail input/output operational amplifier from Microchip, to amplify the output of the liquid sensor. For a visual presentation of the fluid sensor status, this Click board™ has an RGB LED that uses all three colors to indicate water detection, no water detection, and the LED ON. The onboard VREF potentiometer is used for the calibration of the liquid sensor. This way, you can set the threshold for what you want to detect.

Water Detect 2 Click uses an interrupt DET pin (liquid detection) to communicate with the host MCU. In addition, you can turn the LED ON/OFF over the ON pin of the mikroBUS™ socket.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this 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