Rain Drop Detection Sensor Module
                     
ADIY
Rain Drop Detection Sensor Module
ADIY
Rain Drop Detection Sensor Module
A rain sensor module is an easy tool for rain detection. It can be used as a switch when a raindrop falls through 
the raining board or for measuring rainfall intensity. The module features, a rain board and a control board that is 
separate for more convenience, power indicator LED and an adjustable sensitivity through a potentiometer. 
ADIY
Rain Drop Detection Sensor Module
The analog output is used in the detection of drops in the amount of rainfall. Connected to a 5V power supply, the 
LED will turn on when induction board has no raindrop, 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.
ADIY
Rain Drop Detection Sensor Module
It includes a printed circuit board (control board) that collects the raindrops. As raindrops 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 5V.
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