Simple Rain Detector
This project is a a very simple rain detector.
When a drop of water hits the rain sensor board overlapping two neighboring strips, they create a bridge where current can flow so the LED turns on.
The Circuit
When the two inputs of the rain sensor connected, (ie when a raindrop lands and overlaps two strips, current flows to the transistor turning it ON. When the transistor is ON, current can flow through the LED, lighting it up.
Parts List
Battery
9V
LED
Light-Emitting Diode
Q1
BC547
R1
1 kΩ
R2
470 Ω
U1
Water Sensor
