I tried it in an autonomous robot I designed, but removed it because it was
far too sensitive. I was picking up all kinds of nearby magnetic fields, and
even found that it could be affected by water pipes or electrical wiring in
the floor or walls. Just to show how sensitive it is, I think the
documentation describes that it could be used in a car to detect another car
nearby. Every once in a while it would receive a reading of 400deg or
something, so the software would have to know enough to throw it out. I
ended having to do some sort of oversampling to get good results, and the
eventual sample rate was too slow for me to use in my application.

Stephen

> -----Original Message-----
> From: Tom Handley [mailto:thandley@TELEPORT.COM]
> Sent: Wednesday, February 14, 2001 1:08 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: Vector 2X Compass for use in a Robot
>
>
>    I'm about ready to add a Vector 2X compass to my robot. I
> took a look at
> Precision Navigation's web site and I found it a bit
> `pathetic'. I could not
> read all of the on-line manual, for example. I'm using NetScape v4.76.
>
>    Anyway, it looks easy enough to talk to. Has anyone used
> this module? If
> so, does it include a manual (or a few pages...)? Has anyone
> used it in a
> robot? I looked at the calibration procedures. Since my
> little robot wanders
> around the house (not installed in a vehicle), there
> should'nt be a problem
> with nearby magnetic fields. The dual PM motor drive will be
> about 6" from
> the compass but a standard R/C servo will be about 3" away.
> That's used to
> scan the ultrasonic sensor to build a picture of terrain 180
> deg in front of
> the robot. I've looked at the raw data calibration equations for the
> compass but I'm hoping to do that during the installation and
> not have to
> update it while the robot is moving around. Thanks,
>
>    - Tom
>
>
> --------------------------------------------------------------
> ----------
> Tom Handley
> New Age Communications
> Since '75 before "New Age" and no one around here is waiting
> for UFOs ;-)
>
> --
> http://www.piclist.com#nomail Going offline? Don't AutoReply us!
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