Features:
1. Adopts premium quality FR-04 double-sided material, with a large area of 5.0*4.0CM, and is treated with nickel-plated surface, which has superior performance against oxidation, electrical conductivity and life.
2. Comparator output, the signal is clean, the waveform is good, the driving ability is strong, more than 15mA.
3. with potentiometer adjustment sensitivity;
4. working voltage 3.3V-5V
5. Output form: digital switch output (0 and 1) and analog AO voltage output;
6. with fixed holes for easy installation
7. small board PCB size: 3.2cm x 1.4cm
8. using a wide voltage LM393 comparator
Function introduction:
1. Connect the 5V power supply, the power indicator light is on, when there is no water drop on the sensor board, the DO output is high level, the switch indicator light is off, a drop of water is dropped, the DO output is low level, and the switch indicator light is on.
2. Brush the water droplets above and return to the high level state.
3. AO analog output, you can connect the AD port of the MCU to detect the amount of rain on the top.
4. The DO TTL digital output can also be connected to the MCU to detect if there is rain.
Wiring:
1. VCC: Connect the positive pole of the power supply (3-5V)
2. GND: connected to the negative power supply
3. DO: TTL switch signal output
4. AO: analog signal output

Package List:
1 x sensor board
1 x control board
2 x 20cm-dupont thread