OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › Design of the 24VAC version › Reply To: Design of the 24VAC version
January 21, 2022 at 12:54 pm #72080
Because ACRET is basically the circuit ground (well, it’s connected to a current sensing resistor which is very small so it’s practically the ground of the circuit). For that reason, ACRET is basically 0V. In a circuit all voltages are measured against the ground, so if that point is ground, then it’s always 0V.