Re: pic a/d problems

From: Frank Bemelman (f.bemelmanx_at_xs4all.invalid.nl)
Date: 10/23/04 

Date: Sun, 24 Oct 2004 01:52:41 +0200

"timmmmayyy!" <timmmmayyy@nospamplease.com> schreef in bericht
news:417ae6e7$0$66428$ed2619ec@ptn-nntp-reader03.plus.net...
> Reference is the vdd and vss.
> It may be the circuit boards, i will put an ic holder on one pcb, and try
> different chips within the same circuit.
> impedance is 1k
> aquasision time is 1ms.
> thanks

Then I would check if the supply voltages are different. A 7805 regulator
for instance, can vary between 4.8 and 5.2V. (+/- 4%). Your readings of 79
and 83 are +/- 2.5% of 81. 

-- 
Thanks, Frank.
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