At 07:10 AM 20/05/2005, you wrote:
>He's concerned about the availability of the parts firstly.

Which AVR?

>Second issue is the A2D converter built in reference.
.........
>Is it really that pointless to use the internal reference or not?

There seem to be some 'ISSUES' with the built in reference,
I haven't had to use the A/D converter for precision measurements
yet so can't really comment. But you can always use VCC as Vref
(internally switched) of use an external Vref.

Regards

John Samperi

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