Instructions:
When connected to a 5V power supply , power indicator light, no water droplets on-board sensors , DO output is high, switch lights off, drop a drop of water , DO output is low, the switch indicator light
Brush above water droplets, has returned to output high state
AO analog output can be connected to the microcontroller AD port to detect drops in the above rainfall size
DO TTL digital outputs can also be connected to the microcontroller to detect whether there is rain .

Features:
Power indicator, output signal LED indicator
No rain when the LED light output is high, the raindrop up, the output level, LED light.
Large area raindrops, more conducive to the detection of rain.
Board with positioning holes for everyone to install
Voltage: 5V
Control board board size: 3 * 1.6 MM
Large area raindrop test board 5.4 * 4.0 MM

Wiring:
1. VCC: positive power supply (3-5V)
2. GND: power supply is negative
3. DO: TTL switching signal output
4. AO: analog signal output

Package Included:
3*LM393 Rain Drops Sensor