16F18855 at 5VDC

Yeah, you get what you pay for in pots:

B5K pots:
4.70K <--- ADC reading goes 2 - 254
4.84K
4.98K
5.01K
5.06K
5.15K

B5K pots with switch:
4.96K
4.98K
5.01K
5.06K
5.07K
5.11K

(the others go from 0 - 255)


I was thinking of bumping up VREF- to 0.5V with 470R/30R voltage divider.

I'm already using FVR 4x at 4.096V, so thinking of leaving that AS-IS.


I'm really liking your idea:

Sample the input 16 times, sum all values and divide by 4. Now you have a somewhat filtered 12bit result