Hi Tony,
I collect alot of information that has been posted here and other places. I have attached a file that has a schematic for what you are looking for. I'm pretty sure Ms. Melanie has posted several times on this subject also.
Let me know if this helps.
BobK
I did some further searching and found more for you. http://www.picbasic.co.uk/forum/show...ght=Data+power. Melanie's drawing and comments are there along with other comments on the subject.
Good luck!
BobK
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