idea..

[Terry Martin]

Joe Boucher wrote:
> 
> This mechanical engineer had an idea related to this thread and I
> haven't a clue a clue how to implement it.  Would it be easy to use one
> or more of the standard IC's to make a visual instantaneous fuel usage
> meter?  If the fuel pressure to the injectors is constant, then the
> variable of fuel delivery is injector pulse.  If you knew what the
> longest potential injector pulse length is, then could you make a
> display of ten LED's and have the LED's light up as the pulse length
> goes up?  I realize the pulse length is rather small in relation to the
> respomse of the LED's and your eyeball, but it seems like a resonable
> project.  I'm more interested in if it could be done easily rather than
> begging someone to do it.
> 
> Joe Boucher
> '70 RS/SS Camaro   '81 TBI Suburban

It sounds like a job for a simple comparator circuit, (like what drives
the LED bar display on a stereo mixer). In fact you could probably scarf
the components right off a scrap display.