Need help powering two circuits on a single power supply Answered
Hello, I need some help with a project I'm working on and hopefully someone has an answer. I'm building a white noise generator and it consists of two circuits, the white noise generator and a amplifier. Now when I bread boarded these I had each circuit built on its own bread board powered by its own 9v battery supply, but I want to have both circuits powered by a single 9v power supply with a 5v voltage regulator.
Now when I bread boarded the device it worked fine using two 9v batteries powering the individual circuits, but when I connect them to a single power supply the circuit starts oscillating instead of generating white noise. I've tried all sorts of different ways of rewiring the circuit, but I can't get it to run on a single 9v source without it oscillating. I think it has something to do with the amplifier signal feeding back into the white noise circuit. What I can't figure out is why it works when powered by two separate power sources and not a single power source.
Anyone have an idea of what's going on here? I could really use some advice.