Would the person who started this topic be willing to make the finished
results of the project available on the web? It would be much appreciated.

> ----------
> From:         Andy Kunz[SMTP:support@MONTANADESIGN.COM]
> Sent:         Wednesday, October 06, 1999 9:22 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: Accelerometers and Gyros
>
> >I need a little bit of help in interpreting the datasheets. First off, it
> >appears that most rate gyros give a constant DC output for a constant
> roll
> >rate, and the accels give a constant DC output for a constant
> acceleration.
> >Correct?
>
> Yes.
>
> >Secondly, aparently, for both gyros and accels., there is a large
> >manufacturing variation in the DC offset. So, I guess we are just
> supposed
>
> Didn't see one in practice.  We used a pot to take care of this, though.
>
> >In addition, there seems to sometimes be a fairly sizeable tempco on the
> >output. How often does one need to compensate for this? In other words,
> >should I expect to have to include a thermistor in my circuit if I want
> to
> >detect,say, 0.1 g or 0.5 deg/sec roll rate? OR, should I be looking for
> >better gyros/accels that have a smaller tempco?
>
> On the gyro I did, I just check the bias with the unit at rest.  Took
> about
> 30 seconds of samples, found the mean.  Was very good for seeing if
> anybody
> jiggled it during that time.
>
> I used the Murata sensors.  Charley in Hungary has all the sample pieces
> and literature when I was done with it.  Charley?  Are you there?
>
> >I am also,of course, open to suggestions on specific models to use.
>
> For the accel., use the ADXL202.  It's worth every penny.
>
> Andy
>
> ==================================================================
>  Eternity is only a heartbeat away - are you ready?  Ask me how!
> ------------------------------------------------------------------
> andy@rc-hydros.com      http://www.rc-hydros.com     - Race Boats
> andy@montanadesign.com  http://www.montanadesign.com - Electronics
> ==================================================================
>