EN
Brand
:
Robotistan
Product Code
:
20105
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The Raindrop Detection Sensor Module is basically a sheet of nickel coated in lines. It works on the principle of resistance. It consists of two modules, a rain board that detects the rain and a control module that compares the analog value and converts it to a digital value. The sensor is a resistive dipole that exhibits less resistance when wet and more when dry. It increases the resistance when there are no raindrops, so a higher voltage is taken according to V=IR. When there is a raindrop it reduces the resistance because water is an electrical conductor and the presence of water connects the nickel lines in parallel thus reducing the resistance and reducing the voltage drop across it. Raindrop sensors can be used in the automobile industry to automatically control windshield wipers, in the agriculture industry to detect rain, and are also used in home automation systems.
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Raindrop detection sensor can give both analog and digital output. It is extremely easy to use and has 4 pins to connect. A0 (Analog Output) pin gives us an analog signal between (0V-5V). D0 (Digital Output) pin gives a digital output as 0 or 1 over the comparator circuit.
