Power bypass circuit? Answered
Hey everybody, Ok so here's the deal...I'm building some external speakers for my zune. I'm using some the board out of some old computer speakers to amplify the sound. Right now, since I'd like to make it portable, I've got it hooked up to a 12v regulator going to two 9v batteries. Since it seems to drain the batteries of charge pretty quickly, I'd really like a better way to keep them powered when I'm near a wall outlet (like when I'm at home). I managed to find an old 12v wall adapter that I could use as a constant source of power. Correct me if I'm wrong but I'm pretty sure that I can't have it and the batteries hooked up at the same time. So what I'd like to know is how do you build a bypass circuit (or whatever it's called) so that, when the wall adapter is plugged in, the board will draw power from it instead of the batteries? Sorry for the long read, and happy building everyone.