Re: gEDA-user: buzzing board

[Randall Nortman <geda-lists@xxxxxxxxxxxxxxx>]

On Thu, Sep 13, 2007 at 08:35:35PM -0400, evan foss wrote:
> I have had audio amplifiers and large transistors in general buzz on
> their own. Are you sure it is really on standby?

One good way to address this and other such possibilities would be to
start de-soldering each component that is not strictly necessary to
drive the OLED.  Do them one at a time, and test between each one.
Sounds like a fun way to spend an afternoon.  If you have a spare
board and components, it might be easier to start from scratch, and
add one thing at a time.  (Which would also help catch bad solder
joints.)

If you get down to just the CPU, OLED, and required support
components, I would go so far as to remove the CPU and its required
components, and solder on wires to drive the OLED from off-board.
Then you'd have it pretty well narrowed down, I'd say.

-- 
Randall


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