[sdiy] wall warts--wishful thinking

[Brock Russell]

At 01:15 PM 8/16/2005, John Blacet wrote:
>I did some very basic external filtering work with a small switcher and 
>got nowhere! Obviously, this not trivial.
>
>If anyone comes up with a decent filter or some technical info of 
>interest, let us know.

Some technical info:
http://www.web-ee.com/primers/files/fsect8.pdf
SECTION 8 - HARDWARE DESIGN TECHNIQUES, page 19 POWER SUPPLY NOISE 
REDUCTION AND FILTERING

http://www.powerint.com/PDFFiles/an15.pdf
TOPSwitch® Power Supply Design Techniques for EMI and Safety

I have to agree with Paul on this one,
>The only successful time to get the noise out, is when you are
>designing the switcher.

Brock
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