Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I just posted on electronics-101 with an offer to post a constant current source design and theory of operation for use in plating PCBs.

If anyone is interested in 0-5 AMP constant current source speak up and I will post a schematic, BOM, and a layout here. It's relatively simple design. Power source for the circuit comes from an old 12V car battery charger. The stupid ones which doesn't know when the battery is topped off. They can supply 10,20 30AMPS at 12V.

I'm in a process of setting up a plating for my PCB's thus I designed a circuit for such use. component count was one reference supply voltage IC, 7 small signal transistors, one pot, trim pot optional, Analog panel meter so you know what you are putting out, power transistors and 9 resistors I think one small cap for feedback stabilization filter caps.

Sincerely,

Ms. smilingcat