Consisting of a base with a wide detection area (34x47 mm) on both sides and control electronics, this product is particularly suitable as a detector of rain. The electronics section has an analog output, a digital, a trimmer to adjust the input sensitivity and two status LEDs. D0 The digital output can directly drive devices with maximum absorption of 100 mA as a relay, buzzer, small fans, etc. When the detection area is not wet by rain, the digital output D0 is at high logic level, when it is wet goes to low logic level. By connecting the analog output A0 to the analog input of Arduino it is possible to know the amount of rain falling on the sensor. Power: 5 Vdc.