EE question about duty cycle

Clive Apps Techno-Logicals 416 510 0020 clive at problem.tantech.com
Fri Jul 3 15:05:46 GMT 1998


> 
> EE help needed:
> It seems that I have some extra board space on the
> O2 meter I'm working on... and was wondering how
> to implement injector duty cycle measuring. I can
> figure out the PRF measuring easy enough, but how
> to combine that and PW to get a percentage I'm
> lost. Help!

how about an integrator
100% = 10v (arb #)
0% = 0v
anything in between % = .1 x V
then a regular voltmeter can be used as the output device
and for ECU a voltage divider can give you any number you need to work with

Clive 



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