OpenSprinkler › Forums › Pictures and Creative Use › OpenSprinkler with Relays for Christmas Light control › Re: Re: OpenSprinkler with Relays for Christmas Light control
You can find 24VAC relays on Digikey, Mouser, or other electronic component distributors. For example, here is my search result on digikey:
Also, note that all current versions of OpenSprinkler have a built-in relay (5V coil voltage, contact rating 120V / 2A and more recent version 240V / 3A). I would be cautious to use them to actually switch power-line devices, because the PCB traces are probably not thick enough to run a high amount of current at 110V. But they can perfectly switch low voltage (like 40V or below) devices.