Injector Duty Monitor

[Bruce Plecan]

-----Original Message-----
From: rauscher at icst.com <rauscher at icst.com>
To: DIY_EFI at efi332.eng.ohio-state.edu <DIY_EFI at efi332.eng.ohio-state.edu>
Date: Tuesday, January 05, 1999 1:25 PM
Subject: Injector Duty Monitor

IF your doing anything serious ya need pulse width, with at least  20.x
millisecond
maybe higher (more that 20), and a resolution of at least .x millisecond.
I'd perfer
.xx, with possibly an adjustment for dampening the flickering of numbers.
  Reading with a dwell meter is OK, and 1000x better than nothing but that's
about it.
  Bruce

>
>
>
>On this subject, what is it that we really want to
>measure? Duty cycle or the pulse width?
>
>The two designs presented (B. Bowling and C Hack),
>are nice. But getting access to a PIC programmer
>can be a problem. JDR carries a bunch of PIC's, and
>the OTP 16C56 can be had for $4.50US, not bad. A
>AT89C2051 w/flash is $7.00US, plus Christian's
>design reads out on an LCD screen, nice again.
>
>
>If there's enough interest, would someone with a
>PIC programmer burn up a bunch for a group purchase?
>
>
>The other thing that can be done, is to use some
>analog stuff, integrate the pulse, and read it out
>with a DVM. Have it able to measure from say, 0 msec
>up to a max of 20 msec?
>
>If that's what we need, I'll do the design.
>
>Anybody?
>
>
>BobR.
>
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