I have used them to measure vehicle performance, have a look at
the performance meter at www.ac22.com  What sort of resolution
are you looking for?  If you set the filter capacitors to give a slow
enough response you should be able to resolve to 5mg.

Martin
> Got to ask Andy. What was the application? Can you say? Sounds interesting!
> I'm thinking of using the accelerometer for Tilt input but so far it seems
> sort of marginal in terms of resolution (I'm using the slightly older 2G
> sensor not the latest updated E version - I picked up a few a while ago and
> have just got around to using them).
>
> BTW have you ever used any of this stuff in any of those fast targets err
> surface craft you like to play around with. Is it possible to add any sort
> of stability enhancement (or would that spoil all of the fun...).
>
> Andy
>
> ----- Original Message -----
> From: "Andrew Kunz" <akunz@tdipower.com>
> To: <PICLIST@mitvma.mit.edu>
> Sent: Wednesday, October 18, 2000 12:50 PM
> Subject: Re: [PIC]: Using 2 CCP: Compare failed if Capture event the same
> time
>
>
> > >Almost a correct guess. What I'm actually doing is using the capture
> input
> > >to read from and Analog devices accelerometer (which generates a PWM
> style
> > >output prop to the G force). But yes the compare part of the CCP is being
> > >used to generate an RC pulse! Actually I think I can simply switch
> between
> > >the two (I have the time available), I want to keep the two PWM chans to
> > >generate a set of PWM outputs for speed control!
> >
> > First, make sure you can get the part of Analog if you are making more
> than one.
> > They are really hard to get right now (I have several on order since May
> and
> > they're telling me April 2001) and will cost a lot more than they quoted
> > earlier.
> >
> > I have used this exact setup.  Works great!
> >
> > You can keep the one input always set to the ADXL device and integrate the
> > results constantly (hint hint).
> >
> > The PWM output you can switch back and forth between two servos using a
> logic
> > chip (demux).  Then you can update them as frequently as you want.  I had
> a
> > design using a GAL to use the two channels as inputs, then flip one pin
> and some
> > software to turn them into outputs, and they would go out on another two
> pins
> > from the GAL.  Super-accurate mixing, only used 3 pins to get 2 inputs and
> 2
> > outputs with .5uS resolution.  The logic was all very fast and short code,
> > leaving lots of codespace to do things like variable mix ratios, expo,
> etc.
> >
> > Andy
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu
> >
> >
> >
> >
>
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>

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