OpenSprinkler Forums Hardware Questions OpenSprinkler Pi (OSPi) Where is the mini-relay? Reply To: Where is the mini-relay?



The mini-relay has been removed from the circuit a while back (probably more than a year back). If you want to use a relay, you can get a 24VAC relay and connect it to any zone like a sprinkler valve. We have tested several 24VAC relays that work fine with OpenSprinkler:
Also, if you are looking to control powerline devices, you can use an RF transmitter in conjunction with RF power sockets. RF station is now a standard feature in OpenSprinkler firmware, and OSPi circuit board has pin headers that you can directly plug a RF transmitter into. This feature is explained in this blog post: