AVR-Chat

On Tue, 23 Aug 2005 15:52:19 -0500, you wrote:

>On Tue, Aug 23, 2005 at 03:04:21PM -0500, Michael Haisley wrote:
>> I'm having a problem with a tiny26, the ADC values seem to be just a
>> little bit insane.  The chip works on another board just fine, and
>> only some of our boards are having the problem so, i'm thinking defect
>> or tolerance issue, is causing the ADC to go nuts.  Does anyone have
>> any insight as to things that could cause the ADC to get upset?
>
>Electrical noise.

I have seen a Tiny26 ADC do odd things if you forget to connect the analog Vdd pin, like do one good
conversion after powerup then return garbage afterwards