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Re: gEDA-user: buzzing board

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Subject: Re: gEDA-user: buzzing board
From: DJ Delorie <dj@xxxxxxxxxxx>
Date: Thu, 13 Sep 2007 18:36:26 -0400
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In-reply-to: <A59E3618-8B8C-40F1-AB6A-38C84436462E@xxxxxxxxx> (message from Steven Michalske on Thu, 13 Sep 2007 13:17:49 -0700)
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> take your 3.3 volt bench supply and bypass the 3.3v switcher.

No change!

I took out the switcher and wired an LDO into the test points, same
symptoms as before.

The LDO got hot, which is why I went with a switcher - it's got to
drop 12-17v down to 3.3v with enough current to drive the cpu,
ethernet, mp3 chip, eeproms, and oled logic.

But the board worked, and still buzzed.

So, it's NOT the inductors!

Whew.


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Follow-Ups:
- Re: gEDA-user: buzzing board
  - From: Steven Michalske

References:
- gEDA-user: buzzing board
  - From: DJ Delorie
- Re: gEDA-user: buzzing board
  - From: Dave McGuire
- Re: gEDA-user: buzzing board
  - From: Steven Michalske
- Re: gEDA-user: buzzing board
  - From: DJ Delorie
- Re: gEDA-user: buzzing board
  - From: John Coppens
- Re: gEDA-user: buzzing board
  - From: Steven Michalske

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