--- In "Rich Peet" <>
wrote:
> Well that is neat.
> > http://www.uwm.edu/PSOA///Film/Danielson/Mic%
> 20Preamps/AudioBuddy_PCBoard.jpg
> > Hope you see something interesting, Best, Rob D.
Looking at the photo more I don't understand why it will not work on
dc. You just need to supply the correct polarity at 2.5 volts over
the output of those regulators. The 4 digit number on the regulator
chips will tell you the voltage out of them and just add 2.5 to 5.0
volts. I also don't see that it would hurt it to supply the wrong
polarity other than to make it not work.
Are you sure you supplied the correct polarity when you tried it on
dc?
Looks like a simple full wave bridge conversion from ac to dc.
filtered with just 2 large caps on both the + and - sides. then the
outputs of that go to the two regulators.
Rich
Rich
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