Hi Guy's Sorry. I am causing all sorts of confusion here. To clarify....This digital volt meter is a great idea. I will build my own 0-30vdc variable supply at 3 amps. very similar to what you have on your site. However instead of using analogue meters. I would like to build this digital voltmeter into it. I would also like some detailed guidance from you knowlegable gentleman as to how to change the digital meter into a digital ammeter. Your assistance would be greatly appreciated. Greg