Weird Problem

[mackrackit]

What are you using for a power supply?

[isaac]

Thanks for your response its a Variable bench power supply 0-30V @ 1A

Isaac

[mackrackit]

If the power supply is stable, thought maybe you were using batteries, I will have to ask if there is a load on the divider.

Other than that, I will have to guess that the pot becomes unstable with a little heat.

Why not use fixed resistors?

[skimask]

Other than that, I will have to guess that the pot becomes unstable with a little heat.

And it's a 20K pot! I'd bet a bump from the other end of the table would knock it out of whack.
Try a smaller value pot.

[Dave]

isaac, The maximum recomended input impedance for all Microchip Processors is 10K....

Dave Purola,
N8NTA

[isaac]

isaac, The maximum recomended input impedance for all Microchip Processors is 10K....

Dave Purola,
N8NTA

its not for the input the pic
but i suspect its got to be the pot would try a lower vaue like 12k

[skimask]

its not for the input the pic
but i suspect its got to be the pot would try a lower vaue like 12k

Same thing most likely applies. Lower the values of the resistors.