Just as an aside, on page 27 of the current Griot's Garage catalog, they
have a small red-yellow-green "parking light" for $79.95. From the
description and photo, it uses IR sensor.
Ed
Joe Flake wrote:
>
> >
> > Easy solution (almost too easy!):
> > http://www.trafficlights.com/
> >
> > > I have obtained a traffic light, actually one of the small european types,
> > > and would like to use it as a display in the family room.
>
> I agree. The product on that site looks to be the quickest
> best way. And the price isn't out of line if you have to buy
> much for a DIY project.
>
> I too had a traffic light YEARS ago, back in college days (seems I
> spent one summer as an intern for the Traffic Engineering Dept
> for the City of Charlotte. This old unit made its way to the
> trash, and I rescued it.)
>
> Ah, the memories of telling drunk folks at parties that we'd
> gone out on the streets and climbed up on top of a truck to
> steal the thing... It finally was passed along to someone
> else via a yard sale many years back.
>
> My first timer was an ugly beast I found in a surplus store. Pure
> mechanical, with a motor rotating a bunch of cams and triggering
> micro switches. Very flexible, but ugly and noisy.
>
> It later got equipped with a circuit from a "color organ" (Remember
> those? An audio input triggered lights to flash with the music.)
> Kind of fun, but not really as nice as the sequencer.
>
> If you wanted a DIY project today, hunt down one of the "light
> chaser" circuits. These are usually for a long string of lights,
> with three separate circuits. I'll bet that if you slowed it down
> enough, it would do nicely for a 3-light signal.
>
> Joe
> flake@a3115jmf.atl.hp.com
|