any takers for this project?

[Bruce Bowling]

~ I will take your challenge.  Let me know any other specific requirements you
~ have.  I have been wanting to do this type of project any way for the
~ inductive tach that I want to build for getting rpm of various engines.
~ Please give me some time though.  I have been putting in a lot of time at
~ work lately and dont have a lot of free time at the moment.  I am always up
~ to a good challenge as was evident in winning the engineering design contest
~ at the U of I for 93.  Also since I am new to network stuff, what is a good
~ way for me to send the schematic?
~ 
~ David J. Doddek                                          |pantera at dris.com
~ Owner SGD Electronics & Development Engr for Caterpillar |h 309 685-7965
~ Formula SAE Team Sidewinder 94-95                        |w 309 578-2931
~ 89 T-bird SC,  69 Fairlane w/SGD EFI                     |fx 217 428-4686
~ 74 Pantera w/Electromitive Tec-II Twin turbos and Nitros |
~ Hey, If you are going to go fast, go REEEAAL FAST.       |
~ 
~ 
I think others (especially hacker EFI) could use such a device.

The requirements:

	1) Use an inductive pickup, like the ones found on cheap
	timing lights, etc.  Tom Walters, however, pointed out
	that a Hall-effect sensor may be used instead (might work!).
	To test, one may just use a ferrite core with around 25
	turns on #22 wire, slipping the core through the plug
	wire, and hence making a inductive pickup.

	2) The circuit generates a logic-level transition (direction
	I do not care, can always invert) when spark event happens.
	The output should be of sufficent "length" to ensure triggering
	of most any circuit which could be driven by this.

Seems real simple, but I failed (even though I only put in a few
hours for a solution).  This should be Circuit 101 stuff.

- Bruce
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               Bruce A. Bowling
  Staff Scientist - Instrumentation and Controls
 The Continuous Electron Beam Accelerator Facility
    12000 Jefferson Ave - Newport News, VA 23602
                 (804) 249-7240
                bowling at cebaf.gov  
        http://devserve.cebaf.gov/~bowling
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