How about series diodes in the power supplies ? 0.6V drop may be OK (or
less if you use schottys)
Or run off the USB supply only?
RP


Found the problem, the voltdrop across the 100ohm series resistor I use
with the ICSP caused the problem. I've shorted it out but now I have to
unplug the USB cable every time I program it so as not to have power go
back into the PC and then unplug the programmer every time I connect the
circuit to the PC (Using power from the pc USB ) Has anyone got any
suggestions as to how to get around this inconvenience?
Thanks to all for their input.
Regards
Mark

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu