There is a PIC-related item in a back-issue of EDN Magazine (June 19
1997) that could be of interest to readers.

It shows how a 16C54 can be used with a Maxim chip (MAX951, contains an
op-amp, comparator and voltage reference) to measure voltage with an
accuracy of 0.05% or better.

It also gives a program listing for the project, including a way of
converting the A-D output to BCD and displaying it on a standard Hitachi
serial LCD display.

It can all be downloaded from:

http://www.ednmag.com

Download document #2046 from the DI-DIG area.

Now for the bad news:
a) I defy you to do the above download in less than 45 minutes.
b) The listing seems to be riddled with errors. I am not sure what
assembler they are using.

John Blackburn,
South London UK.