I bought a 12 volt relay from ebay. My thought was I'd provide the back end with a 12v car battery or 12v lawn tractor battery and 1 line from the arduino to signal the LOW/HIGH trigger. Then on the front end I'd power a 12v DC device, such as, a water pump or CPU fan. Do I have the right idea for t…

12VDC Relay

terryking228 April 20, 2014, 2:57am 3

Lots of info on Arduino controlling power on the ArduinoInfo.Info WIKI HERE:

The COM terminal on those relays etc. explained there.

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