Hey folks. I've been trying to find out how to modify the value of a potentiometer, but so far I haven't had much luck. Things I found on the web only seem to refer to if I'm using it as a rheostat, but I need it as a voltage divider.
Basically, I have a microcontroller with an analog-to-digital converter, and I'm using a 2 megohm pot. The input impedance of the mcu seems to be 10k however, and since I'm having a really jittery input, I thought reducing the pot's overall value might help some. I don't fully understand impedance matching though to be honest, so it's still a guess. But I've tried putting equal value resistors from vcc to wiper, and another from wiper to ground, thinking this might do the trick. I ended up with a large dead zone in the center, and the rest ends up being too sensitive, so that's obviously not the correct method.
I know that just replacing the pot is probably just the easiest solution, but that would take several days to order one and more money wasted to ship it. Surely there's a way to do this with just some resistors or something, I hope! Thanks in advance.