Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "J" <wyninejr@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, April 04, 2006 6:57 PM
Subject: [Homebrew_PCBs] fluorescent Bulbs


> Hello,
>
> Has anyone made a circuit that has something like some digital logic
> amd a pic with some long conductor paths that will drive a fluorescent
> bulb? Currently I am isolating the AC signal by having an analog
> ground plane that is isolated from the digital ground plane. There is
> a common ground area in which both planes are connected by a path that
> is at least .50 inches wide. Has anyone done something similiar and
> how much noise did the bulb create? Any ideas on how to keep the
> noise from traveling from the AC ground plane to the Digital ground
> plane via the common ground area? Should I keep the pathway to the
> common ground area to a certain minimum? Any help is appreciated!
> THANKS!

Try connecting the digital and analogue ground planes only at the supply
ground.

Leon

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