>> I suppose you cannot run a 10 bit A/D and divide the result by 2 as the
>> obvious first hit to get rid of +/-1 LSB jitter.

>No. Consider the case 1999 and 2000. Divided by two it is 999 and 1000.
>The last digit is still jumping.

well I think you also need to consider the part I did not quote, and that
was the maximum displayed value is 500, so I was working on using a 10 bit
converter to be scaled to 1000 at the point the display would be 500, and so
the division would eliminate most of the +/-1 LSB jitter. However I take
your point that there are boundaries where jumps will still happen, but I
think you will find that they happen somewhat less frequently, and  so
filtering is needed as others suggest.

I did also suggest that this would be only a "first hit" at the problem.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads