Peter L. Peres wrote:
>
> > are you sure ...
>
> I tried. I tried several configs, it does not work. It does not work even
> if you use a full sized load (10W resistor) and pick off voltage from it
> for a low power load. The output is not DC it is AC made from unfiltered
> rectified mains. So you have all the problems of the output of a normal AC
> transformer, plus a bridge that has to run at 30kHz plus the oscillator is
> not exactly stable so "regulation" is very poor at low load. In the end a
> simple iron transformer will be easier to use ...


Hi Peter, if you have a circuit i'd like to do
a "hack" of one of these. Considering they are
very low cost and have the HV switching semi and
transformer already wound, I think with the
addition of a $0.50 optocoupler and a transistor
to provide some regulation, and a high speed rect
diode we could work a hack to turn these cheap
SMPS into regulated PSUs. I'm sure it would be
useful... :o)
-Roman

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