Analog Meter capability

[swagaero]

Joe Boucher wrote:
> 
> Frederic Breitwieser wrote:
> >
> > >Would an analog meter with 10k internal resistance require more power
> > >than the sensor would put out?  I have a small 10 meg internal
> > >resistance voltmeter, but I don't think this would work well. The
> > >digital meter display wouldn't settle down enough to take readings.  The
> > >analog would tend to dampen out some fluctuations.
> >
> > Go for it.  I believe the impedance will be off... I thought the GM MAP was
> > in the 1meg range... but worse that happens is the needle doesn't move.
> >
> > But, there is a solution... if you don't mind soldering together a simple
> > op-amp circuit to increase the gain :)
> >
> > >Joe (Oscilliscope challenged) Boucher
> >
> > Got mine at a garage sale for under $10. Needed a power supply capacitor
> > (and got it in Radio Shack no less LOL)
> >
> > Frederic Breitwieser
> > Homebrew Automotive Mailing List
> > Bridgeport, CT 06606
> > http://www.geocities.com/MotorCity/Downs/4605/index.html
> > 1989 AG Hummer 4-Door
> > 1993 Supercharged Lincoln Continental
> > 2000 Mid-Engine Sports Car <smile>
> >
> > Seeking info on: Audi 5k Locking Diffs, Audi 5k trans bolt pattern, and
> > 17x11" rims.
> >
> > ---
> 
> That's the plan Stan, er, Fredrick.  I want to setup a MAP sensor on the
> Camaro, take some data points, then take some data points at the same
> rpm or throttle position on something else, such as my Suburban.  Then
> I'll be able to find out if I just need a simple multiplier gain, one op
> amp, circuit or something more complex.  My common sense is thinking
> simple.


remember KISS

Steve
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