Tach signal, is it linear 0-Xvolts, or pulses?

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10-31-2004, 03:45 PM

toolowsol

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Tach signal, is it linear 0-Xvolts, or pulses?

Just wondering what the signal from the tach looks like (too much hassle to haul an oscilliscope out to the car if anybody here knows off hand.) I'm designing a LED tachometer for our FSAE car

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10-31-2004, 04:29 PM

phat51

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Re: Tach signal, is it linear 0-Xvolts, or pulses? (toolowsol)

its a pulse signal, digital on/off, same, runs off the negative side of the coil so same signal as that.

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10-31-2004, 05:21 PM

toolowsol

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Re: Tach signal, is it linear 0-Xvolts, or pulses? (phat51)

thanks

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10-31-2004, 07:31 PM

tony1

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Re: Tach signal, is it linear 0-Xvolts, or pulses? (toolowsol)

I'm pretty sure it's a square wave signal.

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10-31-2004, 07:39 PM

Enzo-Racing

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Re: Tach signal, is it linear 0-Xvolts, or pulses? (tony1)

yes 12volt square wave

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11-12-2004, 02:06 PM

rtype11

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Re: Tach signal, is it linear 0-Xvolts, or pulses? (toolowsol)

so would the msd output drive a stock honda tach? I need to run my stock tach without the use of my distributor (modded) any ideas, tried the msd output to the blue wire..no worky any ideas?