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Raindrop Detection Sensor Module

86

The rain sensor module is an easy tool for rain detection. It can be used as a switch when raindrop falls through the raining board and also for measuring rainfall intensity. 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.

  • This module allows you measure moisture via analog output pins and it provides a digital output when a threshold of moisture is exceeded.
  • The module is based on the LM393 op amp.It includes the electronics module and a printed circuit board(control board) that “collects” the rain drops.
  • As rain drops are collected on the circuit board, they create paths of parallel resistance that are measured via the op amp.The lower the resistance (or the more water), the lower the voltage output.
  • Conversely, the less water, the greater the output voltage on the analog pin. A completely dry board for example will cause the module to output five volts.

The analog output is used in detection of drops in the amount of rainfall. Connected to 5V power supply, the LED will turn on when induction board has no rain drop, and DO output is high. When dropping a little amount water, DO output is low, the switch indicator will turn on. Brush off the water droplets, and when restored to the initial state, outputs high level.

Specifications

 Adopts high quality of RF-04 double sided material.

 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;

 Small board PCB size: 3.2cm x 1.4cm;

 Uses a wide voltage LM393 comparator

TTL compatible

Connection:
  • Vcc to 5V
  • Gnd to Gnd
  • D0 to digital pin 

The rain sensor module is an easy tool for rain detection. It can be used as a switch when raindrop falls through the raining board and also for measuring rainfall intensity. 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.

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