--- Tothwolf <tothwolf_at_concentric.net> wrote:
> On Wed, 26 Dec 2001, Ethan Dicks wrote:
>
> > I can *not* find this again, even after an hour of Googling,
> > Altavista-ing and Freshmeating. Anybody else remember this?
> >
> > It would be a blast to watch the needle peg...
>
> Here ya go:
> ftp://sunsite.unc.edu/pub/Linux/system/status/led-stat.txt
> ftp://sunsite.unc.edu/pub/Linux/system/status/ledstatus-0.1.tgz
I found that. More than once. That's for an LED bargraph. I'm
looking for a circuit that operates an old-fashioned galvanometer-
style panel meter with a needle that swings from side-to-side.
I can invent my own - a simple ladder D-to-A to produce a variable
voltage out of the parallel port. I was hoping to save the math
and use resistor values that someone else has calculated, but after
two days of searching, I guess I _will_ have to go do it myself.
Somewhere in my junk boxes, I have some .5" tall by 1.5" wide signal
meters that I think I pulled from a dead CB radio, c. 1978 (pre-40-
channel). The plane of the needle swing is parallel to the floor,
and the needle has a 90-degree bend at the end, so you see a .2"
tall vertical line slide from left to right as the signal improves.
If I can find it, it'll mount perfectly in a 3.5" blank faceplace.
Now to excavate the old parts!
-ethan
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Received on Thu Dec 27 2001 - 10:28:43 GMT