Rubyrails:
@ieee488 I'm new to Arduino and this is a project I want to do myself.@Paul_KD7HB I don't think I have a 12v relay, only 5v. I'll probably have to get one.
The relay is to switch the 12 volts. If your relay can close and open a circuit, then it will work. You will need a 5 volt supply for relay. Can't be powered by the Arduino, but can be controlled by the Arduino.
Paul