I have read a couple of threads on the subject, but did not quite find the exact problem.
So I'm building a project on Arduino Nano.
It has a 128x32 OLED screen, PN532 NFC module, RGB LED and a potentiometer that I want to use to change volume of the connected Raspberry Pi.
I noticed that every time NFC module check for tag, there is a spike in potentiometer values - around 10%.
I tried smoothing to normalize pot values and moved it out of phase of the NFC module.
However the values are still of by 1% all the time, and I can't set volume to 0.
So before I post any code or schematics is there any way I can normalize those voltage peaks with hardware?