On Mon, Oct 22, 2001 at 07:07:51PM +1000, Mathew cohen wrote:
> I have seen circuit on the web to do this though it uses a current regulator
> that I can not source nor find the specs for. Does anyone have a circuit
> that might be a bit more relevant.

I know where you are going with this. However here's my few compnents list:

- Fuse
- Transformer (240V->8V is ideal, 240V->9V is acceptable)
- Full Bridge Rectifer
- Smoothing Cap (4700 uF should be sufficient)
- 7805 linear regulator
- Anti-osciallation caps as required.

Not isolating the circuit is bad news. One slip up and your circuit and
any operators of that circuit will be connected directly to the mains lines.
It's simply not worth it not to have the transformer unless you have no
other alternative.

Now I'll throw out a related question: What is the smallest transformer one
can get that converts 120/240V to 9V or so?. I'm looking for something small
enough to fit into a single switch box with a circuit.

BAJ

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