Hi! In my first instructable I will show you how to use the FC-37 rain sensor with an arduino. I am using an arduino nano but other versions will work just fine!

Step 1: Things You Need:

1x -- FC-37 and its controller board.

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1x -- Arduino

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1x -- Green Led

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1x -- Red Led

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some jumper wires

Step 2: The Wiring

So to connect the FC-37 and the LEDS to the arduino follow these steps.

5v ------------ VCC (controller board)

GND ------------ GND (controller board)

A0 ------------ A0 (controller board)

You do not need to use D0 on the controller board.

Now on the other side of the controller board there are two pins. You have to connect them to the FC-37. You can connect them in any direction, It doesn't matter. There is also a potentiometer on the controller which adjust sensitivity although you don't have to mess with it to get it working.

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and for the LEDS

D2 ------------------ positive of the RainLED (in my case a red one)

D3 ------------------ positive of the DryLED (in my case a green one)

GND ------------------ negative of both LEDS

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