Starter Tooth Sensor Question

[Peter Gargano]

bcroe at juno.com wrote:
> 
> Flywheel teeth are not so accurate, but there are so
> many of them there should be plenty of resolution.

As well, the angular resolution compared to a much smaller
diameter distributor or crank wheel should be better - even
allowing for gross machining inaccuracies.

> A counter of the same module could keep track of
> crank position.  But another sensor is needed to sync
> the thing.  I have some hall effect devices that adjust
> themselves to the signal level.

This is the job for a small "intelligent" device like a PIC.
It can also easily distinguish missing (or extra teeth) easily
(eliminating a separate sync pickup). Less than US$5 for
5 MIPs - amazing!

Peter
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