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 the standard ...
What would be the easiest, most inexpensive, and safest way of having the computer able to switch a external power source (120V AC) on/off? I'm looking for a way to switch some external devices on or ...
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, which ...