OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Opensprinkler 24V connection problem › Reply To: Opensprinkler 24V connection problem May 27, 2015 at 6:00 pm #38007 RayKeymaster What you described (i.e. swapping the two wires) sounds like you have a 24V DC power supply, not AC power supply. Note that OpenSprinkler is only designed to work with AC power supply (i.e. the output voltage is AC, not DC).
