Tells you how far I am in reading my E-mail if I'm just getting around to
reading this. I got this free data book library CD from Siemens Matsushita
Components and on it was a magnetic-design-tool program.  I've never used
it but the help file looked like it was informative (and over my head).

Kelly Schauf wrote:

> Question:
>
> Does anyone know of any good sites out there for hobbyists wanting to
> roll their own flyback transformers or similar inductors for use in
> homemade switching power supplies?  Specifically, info on cores to use,
> winding technique, types of wire, how to test a homemade inductor to
> measure its value, etc.?
>
> Thanks in advance,
>
> Kelly Schauf