The rain sensor module is an easy tool for rain detection. The module features, a rain board and the control board that is separate for more convenience, power indicator LED and an adjustable sensitivity though a potentiometer.

Specifications:

• Area: 5cm x 4cm nickel plate on side,
• Anti-oxidation, anti-conductivity, with long use time;
• Comparator output signal clean waveform is good, driving ability, over 15mA;
• Potentiometer adjust the sensitivity;
• Working voltage 5V;
• Output format: Digital switching output (0 and 1) and analog voltage output AO;
• With bolt holes for easy installation;
• PCB size: 3.2cm x 1.4cm;
• Uses a wide voltage LM393 comparator.

Features:

• DO output is high, the switch indicator is off, a drop of water drops, DO output is low, the switch indicator light, the output indicator light is on,
  Brush the water droplets above, and back to the output high state. . . .
  
• AO analog output, you can connect the microcontroller's AD mouth to detect drops in the above rainfall.
  
• DO TTL digital output can also be connected to the microcontroller to detect whether there is rain.
  

Wiring:

• VCC: Connect the positive pole of the power (3-5V)
  
• GND: Connect the negative pole of the power supply
  
• DO: TTL switch signal output
  
• AO: analog signal output