>I'm trying to design a Battery Life Indicator for a research
>project I'm working on.  The indicator needs an A/D converter so
>I've decided to use the PIC16C74a, has anyone ever worked on such a
>project that could give me a few tips on how to go about it.

>Thanks

>Craig Bona

You will need to measure voltage and current vs time or "coulomb
count".
There are a number of I.Cs that do this like such as the Dallas
DS2437, Benchmarq bq2018 or you can use the a/d and timers on the PIC
with maybe the Maxim MAX471(or MAX472) as the current(+direction) to
voltage converter.
We are presently using the DS2437 mainly because all we have to do is
wake the processor up from time to time to read the coulomb count
registers.

Lance Allen