Rain Sensor Module is used to measure or detect the rainfall. It comes with 2 output pins which are digital and analog. User can choose to use the digital or analog output. Rain Sensor detects the rainfall by using 2 tracks on the PCB board. When the water or rain drops to the surface of the plate, the resistance between the tracks will change as the water making tracks conduct each other. More water or rain touches the plate, resistance become lower.
- Input Voltage: DC 3.3V to 5V