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

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Oct 31, 2004 | 03:45 PM

toolowsol

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From: IL

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

Oct 31, 2004 | 04:29 PM

phat51

Joined: Jan 2004

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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.

Oct 31, 2004 | 05:21 PM

toolowsol

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From: IL

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

thanks

Oct 31, 2004 | 07:31 PM

tony1

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From: Dallas, TX, USA

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

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

Oct 31, 2004 | 07:39 PM

Enzo-Racing

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From: Deer Park, NY, USA

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

yes 12volt square wave

Nov 12, 2004 | 02:06 PM

rtype11

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From: Russian Mafia, dont, provoke, me

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?