RE: [T3] Digital Multimeter as a RPM indicator?

["Kooser, Jacob" <jake_kooser@mtnsat.com>]

I'd like a copy of that too, if you could.  Thanks,

Jake Kooser

-----Original Message-----
From: Shad Laws [mailto:shad@aircooled.net]
Sent: Monday, September 24, 2001 10:26 PM
To: Type3 (E-mail)
Subject: Re: [T3] Digital Multimeter as a RPM indicator?


Hello-

I don't know how you are with electronics, but you can make a little devise
to work with a digital multimeter for a tach.  Go to national
semiconductor's homepage at www.nsc.com and search for tachometer or pulse
frequency counter or something like that... I've checked it out before and
would do it again, except for that when I just checked their site is down
:-(.  Once it's up and if you don't mind a bit of soldering, I can make up a
little schematic for you if you like...

Take care,
Shad


> Hello,
>
> Does anyone know if it's possible to use a digital multimeter as an engine
rpm indicator? I don't need a value in rpm, I just need a comparative
indicator i.e. engine setting A has higher rpm than setting B. Could I
measure current flowing through the points? Does this change with rpm? Part
of me says it does, but the other part keeps shouting 'how?'
>
> This is for setting the idle mixture on a pair of aftermarket carburettors
in my 71 squareback. The tacho I have does not have the resolution for such
measurements.
>
> Many thanks,
>
> Gary Miller
> Essex
> UK
>
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