Hmm.. I guess things are easier now.   Cool.

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 Sean Breheny
Sent: Thursday, June 8, 2017 2:06 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Designing Switching Power Supplies with COTS magnetics

David,

For home hobby purposes, I've gotten the core halves and bobbins from surpl=
us/eBay sources.

For professional work, I have been able to just tell companies (like Wurth =
Electronics/Midcom in my particular case) what core material, core size, an=
d bobbin size (all from standard parts), number of turns and wire size, and=
 they made samples. I assume that they would have sent me the piece parts, =
too, if I had asked.

Sean


On Thu, Jun 8, 2017 at 3:49 PM, Van Horn, David < david.vanhorn@backcountry=
access.com> wrote:

> Have things changed?
> The last time I tried to do a flyback that needed special magnetics, I=20
> had to go through major hoops to get the bobbins, core halves and clamps.
> That in hand it was not bad at all.
>
> Mostly when I'm doing SMPS lately, they are boost or buck, and off the=20
> shelf magnetics work well enough.
>
>
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