You could do an LED and a light sensor with a white mark on the crank,
of course that would be affected by whatever goop gets splashed up
there, but something to wipe it off as it goes around...
--R
R A Bennell wrote:
What triggers the crank sensor on most new cars? Is there a magnet inbedded in
the crank dampener/balancer/pulley
(whatever you wish to call it)?
IE - If I were to try this route to put a tach in my 76 300D, I assume I would
have to attach something to the
balancer to trigger the sensor as there would not be anything from the factory.
Randy
-----Original Message-----
Given the relatively ready supply of junkyard parts, I can't see any
reason not to just use them, it's nearly trivial. (As I believe the
front crank sensor is already there, at least on a lot of cars. Goes
to the diagnostic socket.) Even if you have to install a factory
sensor, it has to be easier than flanging up something yourself.
And running it all over, and designing circuitry.
-- Jim
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