First of all, do we have a forum for wiring/electrical stuff? This isn't really case and cooling, it isn't really other hardware. If this is in the wrong ...

The 120v relay draws power from the switched light circuit. When the lights are off its impossible for someones garage door opener, or any stray signal, to turn on the collector unintentionally ...

SparkFun’s latest tutorial shows you how to work with relays. A relay is an electrically operated switch. In this case, they’re using it to switch a 120V AC outlet. The article carries … ...