Subject:
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Re: A robot who knows his position (fwd)
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 30 Apr 1999 14:31:29 GMT
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Original-From:
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rajackson@qnx.com*SayNoToSpam*
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Viewed:
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821 times
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<cut>
> > I think a magnetic or gyro compass would work better. Is there anybody around
> > who did interface a compass to the RCX?
>
> I did consider trying to rig up a crude light-sensor looking at a cheap
> compass, but thought against it. Just detecting the, usually red and blue,
> arrow sounds pointless, whilst taking one apart and attaching a patterned disk
> to it seems infeasible as the card of the disk would probably be too heavy for
> the compass needle to move around. Is this the only way to do this without
> building some sort of little bit of electronics gadgetry?
I have not tried this yet as I have not figured it all out yet but....
The dive compass I have (which is relativly large) has a window
visible from the side this has degree markings and lines for every
degree. The lines are reasonably large 2mm or so and have a very
distinct white on black marking. It should be possible to detect the
lines with the light sensor, but detecting the direction of rotation
may be more difficult. There is also a large white arrow on the top.
How were you going to detect the arrow if the sensor could pick it up.
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | Re: A robot who knows his position (fwd)
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| Mike Moran <mm@ee.ed.ac.uk> wrote in response to a compass query from rajackson@qnx.com: (...) Now if you can get the compass manufacturer to vary the degree markings so that the black lines have a grey line next to them before the white in one (...) (25 years ago, 30-Apr-99, to lugnet.robotics)
| | | Re: A robot who knows his position (fwd)
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| (...) around (...) disk (...) for (...) Well, I was just going to place the light sensor statically relative to the case of the compass, and overhead. It would simple note whenever the head of the arrow went past. This is pretty useless, which is (...) (25 years ago, 30-Apr-99, to lugnet.robotics)
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