"Wild_Bill" wrote in message
...
Having a DC output from a transformer is obviously more common that you
think.

The old style automotive ignition coil (autotransformer) outputs HV DC.

That's one example, and it is a transformer although not the kind used for
a game system power source, and the output isn't rectified.

--
Cheers,
WB
.............


"David Nebenzahl" wrote in message
.com...

How do you get DC out of a transformer? Must be a really special one ...

Of course, it's impossible to tell from the O.P. whether the thing in
question is really a transformer (outputs AC) or a power supply (outputs
DC).

To the OP, it would help us to know. What does it say on the wall wart?
Should say something like "10 VAC" or "10 VDC" or some such.



Lot's of "wall-warts" have a rectifier diode and capacitor in the same
little box. More and more they actually have little switching regulators in
there. Those are more efficient and can supply much more current, but they
usually don't last much more than about 15 months because they use such
crappy little capacitors in them, and they are virtually unserviceable.

Mark Z.