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Digital Tachometer Circuit

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3 Threads found on Digital Tachometer Circuit
I want to build a circuit that will pick-up induction from a pulse generated by an engine sparkplug and create a nice digital signal from it.. Any help will be apreciated !
Inject a digital PROBE into your circuit for input and set the frequency of the probe to a frequency comparable to your speed. Does this help?
i need circuit digital tchometer range 30000 rpm (2051+4 digit 7seg. led)