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Topic: Input read (Read 293 times) previous topic - next topic

petronel

I have a LED strip connected to a 12v source with a switch button between them. When you press the button the LED will light up. At the same time, i want to input this button to an arduino and read whether it's on or off.
How should i do this?

spycatcher2k

Connect a voltage divider & common ground to a digital or analog in. You could use GOOGLE 'how to read 12V with arduino' for instructions!
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larryd

If you need complete isolation, use an optocoupler.

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