OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › What sprinkler valves? › Reply To: What sprinkler valves? December 16, 2015 at 1:40 pm #41013 RayKeymaster Yes, the circuit is powered from a single 24VAC power supply. OSPi has internal switching regulator to convert that to 5V which powers RPi. The solenoids are powered from the same 24VAC power supply.
