Rain sensors play a vital role in today’s comprehensive technological world. With its applications in a variety of fields including agriculture, automation applications and in automobiles, Rain sensors essentially play an important role in technological aspects.

A rain sensor is a switching device also termed as rain switch which is activated by rainfall. This is post is all about interfacing rain sensor FC-37 or YL-83 module with the help of Arduino.

Rain sensors are fundamentally set up by two pieces – the electronic board and the collector board that collects water drops. The electronic board has a built in potentiometer for senstivity and adjustment of digital output. It also comprises of power led which lights up when the power is on, and a digital output led.

Functioning of the sensor

The rain sensors function in the following manner. Resistance of the collector board varies according to the amount of water on its surface. When the board is wet resistance of the board increase and output voltage decreases. On the contrary when the board is dry resistance of the board lowers and the output voltage increases.

Parts required for the construction of rain sensor

Parts required for the construction of the rain sensors are-:

  • Ra