I'm using the circuit in the picture as a replacement for a mechanical relay running a 40 wattW, 220 voltV water pump.
The problem is that although the circuit seems to be correct, but it doesn't work, and I'm getting a weird result on the multimeter.
When monitoring the AC output of the circuit with a multimeter, it shows 220 voltsV when the logic input of the moc3042m is low. Also, this voltage doesn't turn on the pump. When changing the logic input to high (5 V), the output doesn't change.
- The actual pump is connected to the
J4
terminal. - The
Pump
label in the picture is for the logic input.
If you see any problem in the schematic, please explain it.