ADCIN signal conditioning?

[Charles Linquis]

Do you have PORTA set up as inputs?
Do you have them set up for analog?
What are you using for your reference (ADCON1) ? Most of the time, Vcc is not good enough.
If you want really good accuracy, you have to use an external, precision reference.

[mackrackit]

Sometimes a capacitor from the ADC pin to VSS will smooth things out.

[droptail]

Sometimes a capacitor from the ADC pin to VSS will smooth things out.

I'll see what a 0.1uF does.

Thanks

[droptail]

Do you have PORTA set up as inputs?
Yes, TRISA =255

Do you have them set up for analog?
ADCON1 =0 (as noted in my setup above?)

What are you using for your reference (ADCON1) ?
ADCON1 =0 sets Vdd as thew ref I believe.

Most of the time, Vcc is not good enough.
If you want really good accuracy, you have to use an external, precision reference.

Really good accuracy would be nice. Right now I have no accuracy.