Quote:
Originally posted by Steve
haha I was just trying to get your minds working, things have been kinda dull here lately.
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It worked!!!
I was thinking of ctshaynes idea of using a digital tach as well, I have one that reads both 2 and 4 cycle engines by using the same principle as the timing gun, in the 4 cycle setting it reads everytime the sparkplug fires and since there's 2 revolutions on a 4 cycle engine it must divide that by two to give the correct RPM, on the 2 cycle setting it just takes the number as is for the calculation (1 spark per revolution)
SO the trick is to full the tach into thinking it is reading a car ignition, one can rig an IR emitter and receiver across the rear tire and hook that to a coil then one could clamp the tack on a sparkplug wire coming out of the coil...Everytime the wheel spins pass the gap it would trigger the IR receiver that would trigger the coil that will trigger the tack......The only question remaining is what to do with the couple of thousand volts sparking out of the wire.....It'll make a nice lightning display?!?
There has to be a cleaner way
