gEDA-user: buzzing board
Stuart Brorson
sdb at cloud9.net
Fri Sep 14 16:35:29 EDT 2007
> ... and the buzz was worst when it was right on top
> of the MRC's LCD. Very weird.
I've been following this sort of off and on, so forgive me if this has
already been mentioned.
DJ, your LCD has a back light, doesn't it? I've seen touch-sensitive
screens using flourescent back lights which are powered by several kV
generated by an on-board switcher. I'd imagine the LCD display also
has a switcher on it to generate the backlight, and if the display is
an el-cheapo model, well, the switcher could have all kinds of
noise-prone components on it.
Just a thought.
Stuart
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