Datalogging RPM signal

[Porter, Bill]

Follow instructions at this link
http://www.charm.net/~mchaney/homedyno/homedyno.htm#inst to make an
inductive pick up.  The link uses the pick up to drive the MIC input on your
laptop.  From here I'm unsure of how to configure to time sync with the wide
band and the DataQ software.  I haven't used the DataQ yet to see if it will
accept outside signals.  Don't know what type of voltage you will get off of
pick up to drive DataQ directly

Date: Sun, 9 Dec 2001 21:39:31 -0500 
From: Stephen Andersen <SAndersen at advan-tek.com>
Subject: RE: Datalogging RPM signal

Thanks for the pointer.  I am actually thinking about buying
the USB logger board ($99) which has a built-in 32bit counter.
I can snag the rpm signal to the DME in my car and multiply it 
by 20 to get rpm (So I'm told).  I think with the 8 single
ended inputs I can record enough (including the WB) for some
decent tuning data...

Not exactly DIY though!!!

Thanks,
Steve

> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Don DRI05 Ricciardiello
> Subject: Re: Datalogging RPM signal
> 
> 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


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