Hello I have made a power supply and I want to put on the digital panel meter that I have. The problem is that the meter cannot measure the same voltage that it is being powered by. Or even a voltage form the same supply. I can power it with a separate source such as a 9 v battery and it works fine but I don't want batteries in my power supply. Does anyone have any ides how to isolate the think or how to change it so that it can measure form the same source that powers it. Or does anyone know of a small digital panel meter that can measure it own voltage that is cheap like under 20 dollars.
thanks
thanks