Signal conversion

Thread Starter

mikefr24

Joined Nov 4, 2007
2
My brother installed a 8 cylinder engine into a car that used to have a 4 cylinder. Now of course the tachometer is reading 2x the correct RPM. The original car tach reads pulses from the distributor and he would like to use the original tach with is new engine. Is there a way to do this with logic chips or a analog circuit to divide the signal by 2?

Thanks,

Mike
 

recca02

Joined Apr 2, 2007
1,214
if it uses a counter u would need a flipflop that will divide the pulses applied to its clock input by 2.
(edit: maybe someone can provide a more elegant solution)
 

thingmaker3

Joined May 16, 2005
5,084
I concur. Any old flip-flop chip capable of running on 12V and sourcing enough current for the meter circuit would work just fine.
 

Nomad

Joined Oct 21, 2007
43
that shouldn't be a problem. i've not had any of my speed sensor or tach circuits cause a problem with a square wave output. i actually needed to isolate one project and used an audio transformer driven with the square wave, talk about a nasty output. but it worked fine.
 

Thread Starter

mikefr24

Joined Nov 4, 2007
2
Thank you gentlemen. I happen to have a drawer full of Flip Flops. I will try one out and let you know how it worked.

Thanks,
 
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