Help with ADCin

[mister_e]

Try something, load the PGM pin to gnd with a pull down resistor (says 1K), if it works, then the chances are that your device programmer don't program the fuses properly.

On the other hand, a nasty breadboard could do some problem. Some have broken power strip along the way. It still looks like a bad Vss connection to me.

EDIT: Program your device, but before check the fuses settings in your device programmer software to see if they match your program. If so, program your device... then read it back. Se if the fuse setting remain the same. Case not, throw your device programmer away Nah, sometimes, just a pull down resistor on the PGM pin while programming is needed. Try it!