Rain sensor

Product description:
Voltage: 5V
Power indicator light, the output signal is LED indicating lamp
TTL level output, TTL output signal for low level drive capacity of around 100MA, and it can directly drive the relay, buzzer, small fan etc
Sensitivity adjust via potentiometer
When no rain, the LED light output high level, when raining, the output ground level,  then LED is bright
The raining board and the control board is separate, convenient to rise the wire.
Large area of the board is more conducive to detect the rain.
The board is equipped with a positioning hole to facilitate installation
Size: 3*1.6 MM
A large area of raindrop detection board 5.4*4.0 MM
The method of usage
Connected to 5V power supply, the light will bright, when induction board has not rain drop, DO output is high, and the switch indication lamp is off, when dropping a little water, DO output is low, the switch indicator will bright
Brush off the water droplets, and restored to the state, output high level
Analog AO output, can be connected to the MCU AD port detection of drops in the above amount of rainfall.
DO TTL digital output also can be connected with the MCU to detect whether there is rain.
Shipping list
1) 1* raindrop induction board and 1* control board 
2) 5* 20cm DuPont lines
3) Provide download address (schematic + test procedures)

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