re: Educate me on Z-Wave

I got 120vac relay with 5v coil off Amazon. I'd recommend finding one with a 3v coil. The pi DO only output 3.3v for a high. I had to add a transistor in series with the relay coil to switch ground on so I didn't burn up my Pi outputs.

Also not sure if you need a relay that supports up to 120. I didn't measure the voltage on my door opener pins, so I just did 120 to be safe. Measure yours and you might be able to use a lower voltage relay.

Here is a relay you could use that easily attaches to the pi power output and it's DO. relay module