Rain / Snow Sensor, Module with Cables
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. A power indicator LED and an adjustable sensitivity thRough a potentiometer. 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 the induction board has no rain drops, 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, it outputs high level.
Rain sensors are used in the detection of water beyond what a humidity sensor can detect.
How it works:
The rain sensor detects water that completes the circuits on its sensor boards' printed leads. The sensor board acts as a variable resistor that will change from 100k ohms when wet to 2M ohms when dry. In short, the wetter the board the more current that will be conducted.
A0.......... Analog output
D0......... Digital output
VCC......Positive voltage (input: 5v for analog 3.3v for Digital.)
+ .......... Sensor board hookup A
- .......... Sensor board hookup B
Board (not module): 2.17 in x 1.57 in x 0.31 in (5.5 cm x 4.0 cm x 0.8 cm)
All prices are in USD.