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mrdarr...@xxxxxxxxx wrote:
> Paul E. Schoen wrote:
>
> ...
>
> > You will probably need to "roll your own", but it should really be nothing
> > much more than a small toroid about 1" diameter, wound with a couple dozen
> > turns of wire, if you use about 50 kHz PWM. #22 to #26 AWG wire should be
> > OK for 3 amps or so. Otherwise, you could probably use parts of an old
> > computer power supply. Of course, you can just buy a DC-DC converter, but
> > 18 watts will probably cost at least $50.
> >
> > Paul
>
>
> My PWM controller is basically this:
>
silly, forgot the link:
http://www.cpemma.co.uk/555pwm.html
(sleep deprived - woke up 4:30am this morning to fly out to LA for a
meeting.)
> Probably a silly question to ask, but just making sure: should I make
> C1 equal to 200 (or the more commonly available 220) pF to get 50 kHz?
> Any special type of cap, or would a simple ceramic do?
>
> Thanks,
>
> Michael
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