I am trying to have 120v AC to 12v Dc, but I can't find a formula to get it.
I am trying to have 120v AC to 12v Dc, but I can't find a formula to get it.
The answer from @crutschow in #2 is what you need for that circuit. But don't shoot for the maximum voltage the circuit can tolerate. That might risk destroying it. It might be better to shoot for 6-9V, to give yourself some room.Thank you for the help. the circuit is what I want to power with 120v AC.
Yes, for that circuit the supply voltage should be no greater than the reverse Vbe rating of the transistors you use.But don't shoot for the maximum voltage the circuit can tolerate. That might risk destroying it. It might be better to shoot for 6-9V, to give yourself some room.