Arduino Rain Sensor Module

The rain sensor detects water that short-circuits the tracks of the printed circuit board. The sensor acts as a variable resistor whose state changes: 100k ohms when wet and 2M ohms when dry. It has 2 outputs, a 1/0 digital output and an analog output from 0 to 1023.

Specifications:

• Voltage: 3.3V-5V
• Sensor dimensions: 3.9 x 5.4 cm
• Sensitivity potentiometer
• 2 indicator LEDs

Wiring:

• 1, VCC: positive supply (3-5V)
• 2, GND: ground
• 3, DO: digital output
• 4, AO: analog output

Shipping list:

• 1 raindrop sensor
• 1 comparator module
• 2 Dupont cables, 20 cm, to make wiring easier