Hi John,
 try this circuit
http://www.members.dca.net/kben/misc/buck.html
works for me, and has a link to the original article
at Circuit Cellar.

Don't forget your topic tags  [PIC]:, [EE]:




John Brown <John.Brown@ANU.EDU.AU> said:

> I would like to use a couple of spare PIC pins to pulse
charge a 3.6v NiCad
> battery (aka ). I assume this can be done by using
three PIC pins:
> I haven't been able to find any circuits or mentions in
the PicList
> FAQ/archives or on the web of this being done? Has
anyone done it
> sucessfully? Details?
>
> John

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