OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Cannot turn Solenoid off › Re: Re: Cannot turn Solenoid off
July 28, 2013 at 8:22 pm #25140
Check if your transformer is 24V *AC*, not DC. If it’s a DC transformer, you will only be able to turn on valves and not turn off. This is due to the way triacs work.