Very very electrical question., Tachometer waveform |
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Very very electrical question., Tachometer waveform |
sgomes |
Sep 3 2004, 09:24 PM
Post
#1
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Electric Member Group: Members Posts: 815 Joined: 6-May 04 From: Campbell, CA Member No.: 2,029 |
Ok, I don't expect to get an answer to this question but here goes nothing:
I've got this fancy tacometer drive thingy that is supposed (IMG:style_emoticons/default/unsure.gif) Assumptions about the tach: It expects at least +5V pulses more is ok. It assumes a four cylinder engine. My assumption on how tachs work: You get one pulse for every spark. So..... assume 6000rpm for the sake of argument 6000rpm= 100 revs per second * 60 seconds 4 sparks per revolution. 4 * 100 = 400 pulses per second. I've got something close to 200 pulses per second comming out of my sender at about +10V. The tach isn't moving. |
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