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From: wdperry@ducvax.auburn.edu
Newsgroups: sci.electronics
Subject: Spark plug Inductive pickup.
Message-ID: <1991May10.164429.4146@ducvax.auburn.edu>
Date: 10 May 91 21:44:29 GMT
Lines: 19


I need to build a device, using an inductive pickup like a timing light, 
that will give a single clean pulse each time the spark plug fires. Pulse
needs to be at least 3.5 volts.  It must be used on the spark plug 
side of the ignition not on the coil side.

I have looked at the signal from an inductive pickup on the plug wire and
it is pretty messy.

Is anyone aware of acircuit that would cleanup this signal and output a
single pulse for each firing of the plug?  +5 volts is available to power
any chips if necessary.

Any and all suggestions would be appreciated.

Thanks,

W.D. Perry	wdperry@auducvax.bitnet
		wdperry@ducvax.auburn.edu