I have a quick question about a circuit I want to build, namely a low voltage AC power source.

I attached a picture of the schematic.

Are there any safety concerns that I might have to pay attention to that are not addressed in the schematic? It is a pretty simple circuit, but it is my first time working with AC, so I wanted to be safe.

schematic of the circuit

  • \$\begingroup\$ You would be better off buying a UL listed, commercial off-the-shelf transformer assembly, which simply provides split phase low voltage AC output. That removes essentially all the hazard. \$\endgroup\$ Commented Apr 2, 2023 at 20:43

1 Answer 1

  1. The primary side (230VAC) needs a fuse. I think the datasheet for the VTX-146-015-106 says there's a fusible link in the primary side to protect against overheating, but I'd still put a fuse in.
  2. Those TVS diodes will make a mess of your AC. You do not need them.
  3. You seem to want a switchable 6VAC/12VAC output. Use the following schematic:


simulate this circuit – Schematic created using CircuitLab

  • \$\begingroup\$ Thank you very much for the advice! \$\endgroup\$ Commented Apr 1, 2023 at 18:59

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.