/diy/ - Do It Yourself

>>806452
the first one is doing as what you'd expect.

look at the picture and look at your schematic.

besides that there's a few other points about your schematic.

but really I might be able to sum it up by just saying put the positive connection to ground rather than mid point. that might be enough

op amps are sorta "tricky" to first timers but really all they do is compare "whats the voltage on +/-, which one is bigger? I'll go to that supply"

so if you have 3v on + and 2v on -, it'll shoot to the positive rail. but the feedback changes the amount of voltage on the terminal and so it re-adjusts itself.