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post #7 of (permalink) Old 9th February 2008
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Originally Posted by itwasntme View Post
i just got a new speedometer one with a rev counter, had the same problem, but one of my tutors (mechanic) told me that you might be able to get a pulse from the ignition or something like that.. ive mad a few calls and am on a mission to get it sorted.. will post something on here when its done. meanwhile.. good luck. J
You should note that if your car have a distributor, then the pulse from the primary coil (NOT SECONDARY!!!) would be the one you need.

But if your car have the waste spark semi-electric ignition system, then the pulse form the primary coil should be doubled then feeded to the counter, it can be achieved easily with a PLL, however im sure that you are not wish to do this.

So you may need to adjust the circuit of rev counter to adapt this.
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