GingerGiant:
I've run into a bit of trouble with my latest circuit. The signal it generates is flippin' awesome, but I cannot read it into the Arduino without ridiculous amounts of noise. I think it is related to the differences in ground voltage between the arduino and my circuit. running a wire from the output directly to the pin I want just doesn't work.
Suggestions?
Well there won't be a difference if you run a wire from an arduino ground pin to your circuit's ground, as you should. But as you didn't show your wiring to the arduino I won't assume you did. 741s are very old (for decades now) that are not known for their quite behaviour and should never be used these days of much better opamps at same or cheaper prices.
Lefty