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Interfacing to spikey signals. Injector pulse.

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rich55

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I want to measure injector pulses on a car engine, so need a nice clean 5v signal for the micro to read.

A typical injector pulse has a nasty 60V spike when it closes:

injector pulse.jpg

Will a standard opto coupler cope with that?

Cheers.
 

Why opto coupler. simply a voltage divider with clamp diode.
 

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