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 … ...

The Shelly 1 PM Gen4 is a 16A smart relay with integrated power measurement to control lighting, outlets, and 120v appliances. There’s an option without power measurement plus an even smaller ...