>
> A bulb with a tungsten filament is of course not the best thing for
> reliability in an environment with a lot of vibrations. I was
thinking
> that modern LEDs have incredible lifespan, particularly when
> underdriven. Some also are bicolor/bidirectional. Might be an
> interesting thing to replace that bulb with one of those.
>
> Francois
Unfortunately, a regular LED won't work here. An LED is basically a
diode- a one-way electricity valve. A tungsten bulb doesn't care what
pole is positive or negative, which is why they can be used here.
LEDs are specific which pole is what, and cannot be a 2-way path.
Looking at it a little differently, when you turn the ignition on,
the light comes on because the regulator hasn't tripped on yet, and
grounds the bulb. Start the car, and the lamp (usually!) goes out,
because the regulator has come on, and the bulb now has power on both
sides. The path is from the ignition switch, to the bulb, and on out
to the regulator. Because of the one-way nature of an LED, this path
is interrupted, keeping the regulator off. NOW.... with all that
Onsaid... that comes from experience with streetrodders who thought
they knew more. A bi-directional may work. I'd have to look into that
and see.
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Received on Thu Mar 31 19:19:41 2005
