Datalogging RPM signal

[Don DRI05 Ricciardiello]

Steve,

I have two words of advice and they are "Brian Dessent". He was a great
help as I had the exact same question for the DataQ DI-194 I'm using. I
have a variable reluctance magnetic pick-up sensing crank rotationon on my
bike. Brian suggested using the LM2917 Frequency to voltage converters. I'm
bread-boarding mine at the moment to test it out.

Don





From: Stephen Andersen <SAndersen at advan-tek.com>@diy-efi.org on 08/12/2001
      21:59 EST

Please respond to diy_efi at diy-efi.org

Sent by:  owner-diy_efi at diy-efi.org


To:   "'diy_efi at diy-efi.org'" <diy_efi at diy-efi.org>
cc:
Subject:  Datalogging RPM signal


Anyone have any pointers on how to log the rpm signal with the
dataq or B&B "cheap person" data acquisition boards?

I figure you can either use an inductive pickup or possibly
intercept the signal to the ECU/DME.  Problem is that I am
an electronics idiot, and I have no idea what form that signal
usually takes and/or how to intercept and capture it.

What I really want to be able to do is log AFR/O2 volts for the
WB with RPM (and possibly MAF and TPS which are simple voltage
signals) to review after tuning runs, dyno pulls, or runs
down the strip.

Anyone got any advice?

Thanks,
Steve

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