There was a company selling small switchers for 5V a few years ago,  
but I can't remember the name. I think it can be googled using  
"switching supplies".

--Bob

Quoting John Dammeyer <johnd@autoartisans.com>:

> Hi,
>
> I have a friend who needs 12 little 12V to 3.3V 1 Amp switcher modules
> something along the line of the NSC Simple Switcher technology  LM2575
> type.  The time to layout a small board and get them made is probably
> longer than just buying 12 modules like that.
>
> Does anyone know of a company that sells small postage stamp size
> modules that do this for under $20 or thereabouts
>
> Thanks
>
> John Dammeyer
>
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