In a message dated 97-03-10 15:32:16 EST, you write:

<<
 Well, The schematic is in Autocad DWG and its kind of ad-hoc, so I hesitate
 to tarnish my rep by sending this nasty thing out...  but if you can deal
 with DWG or DXF I'll be glad to Email it to ya!  Yeah, that sensor problem
 was a different system which I plan to optically isolate, this system is
 interfaced to a device which holds the I/O line high via a separate power
 supply (in the PC)  and that always puts a few extra millivolts on my
 power-off.  Should I perhaps use a diode/relay/analog switch to turn off
 the I/O when power is off?  I hope the optical isolation helps with the
 other problem... mabye thats what I could do here as well.... But I DO need
 something extra, because even with everything unplugged, the system STILL
 holds enough voltage in the filter caps to screw it up even over-night!
  >>

I really don't think that your problem is the filter caps.   I think the
problem is that your VCC is coming up too slowly when you turn the system
back on.  This is a known problem with the pics.  Check the data book.  Mine
has a section warning about this and a solution is provided as well! How big
are the caps?  If you have very large filter caps like in a computer grade
linear supply (10000 uf plus) it will take a realtivly long period of time
for those caps to charge when the system is turned on.

Dave Duley
V.P. DreiTek Inc.