built another one of these with modified layout - still noise
maybe I have a bad chip, I pulled it from the old one so I need to rule that out still
edit: no, still has noise with the other chip
Nice build. I need to make another one of these, it was one of my early builds. I'd be interested in testing op amps for this. I've read that the 4558 can be kinda...bad. Maybe TL072 or 5532 would be better?
I have the following schematic and voltages....I was under the impression that the 10K resistors form a voltage divider and VCC should therefore be ~4.5V, am I wrong?