At 07:35 AM 5/24/2006 -0400, you wrote:

>I assume in the above instance the output of my wallwart would go from,
>say, 10V to 60V which the linear reg could probably handle briefly.
>Sounds about right?

No, the transformer in linear wall-warts will saturate and the output
voltage will never get that high. The primary current will be very high,
through thin wire, and the primary may open up if there is enough energy,
but the circuit should be okay if the output voltage is only 10V and a
typical 40V regulator is used.

50/60Hz transformers are actually very effective surge protectors in
themselves if the circuitry on the other side is designed a bit
conservatively.

It will probably fry every SMPS that's turned on at the time, but again
not much should get through. Could be expensive with things like large
flat-panel monitors, high end printers, and plasma TVs though.

Last time I heard of such a thing happening, the power company picked
up the tab for repairing the damaged stuff, at least for 'consumers'.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
->>Test equipment, parts OLED displys http://search.ebay.com/_W0QQsassZspeff


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