michael brown wrote:

> No offense to Roman, but he seemed to be getting it backwards.  ;-)

Ha ha! Thats me. Sometimes backwards is better?

Re the comparator problem, try config the comparator
with a digital output, and use 2 pots for testing,
one on each input.
That should clear up whether you have a comparator
hardware error or some other fault. Also whack a decent
cap 1uF etc across each comparator input, you may be
getting 300mV worth of spike noise etc. And maybe try
another PIC? :o)
-Roman


> Here is some ugly ascii art of the schematic.
> +5V     |-------------
> |       V            |            16F628
> |____/\/\/\/\___     |         __________________
>                 |    |___RA2__| Comp +   Comp - |___RA1___
>        10K      V             |                 |        |
>                Gnd     __RA3__| Charge Pin      |        |
>                        |      |                 |        |
>                        |      |_________________|        |
>                        |                                 |
>                        |                _________________|
>                        |                |
>                        |____/\/\/\/\____|___|(______
>                                                    |
>                               4.7K         1uF     V
>                                                   Gnd

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body