Occational weird value from Potentiometer
 

I have been testing out a Potentiometer on analog 2, and when I print back the data every once in a while I get a weird number, My terminal would look like such for example (this is at one set position, not changing much at all)

It works fine when I change the position, but it give me a weird number every once in a while which could mess things up. Has anyone else had problems like this or know why this is? Thank you

Re: Occational weird value from Potentiometer
 

This is too large of a fluctuation to be electrical noise.
Are you using a quality pot? A cheap pot can be
intermittent on its wiper and cause fluctuations of
this sort.

Re: Occational weird value from Potentiometer
 

Too wild for electrical noise, but eliminate it anyway: Use a 0.1 microfarad (not critical, can be +/- 100%) capacitor between the wiper and ground.


What value pot? Should be 5k-10k for the RC ADC inputs.

Try it with 2 fixed resistors - does it still jump? (One resistor goes from +5 to center, other from center to ground, center is also your signal. 4.7k resistors or so).

Those should get you to the root cause.

Don