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 15:05:44 GMT
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Viewed:
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1176 times
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In lugnet.robotics, Mike Moran writes:
> In lugnet.robotics, Mario Ferrari writes: • [snip]
>
> > 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'm currently looking at an RCX interface to a Dinsmore compass module that
uses Hall-Effect sensors to detect N-S-E-W and triggers two of them when
dead-center between two cardinal points, so you get N-NE-E-SE... Not that
great resolution, but about as good as a human can do by "eye"! I built a
serial comm version of this for other robots (can't be used by the RCX), now
I'm trying to figure a way to make it reliable to the brick. Stay tuned!
BTW, for all of you out there that have the RCX IRPD kits/units, what have
you done with yours? I'm creating a game area delineated by a black tape
line and turning loose a prey and predator RCX one that runs away and one
that hunts. The hunter will be armed with a pair of dart guns from a Cyber-
Slam kit and an IRPD to search for the prey, the prey will have "hit"
sensors to detect a successful attack and an IRPD to look for things to
run from. Yeah, I have two Mindstorms kits now, I'm an addict!
Both will have down facing light sensors to stay in bounds.
have fun,
DLC
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Message is in Reply To:
 | | Re: A robot who knows his position (fwd)
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| (...) [ ... ] (...) Well, I know this, I was just seeing how far I could get without landmarks. An idea Richard Franks and I had was to use black and white approx. A4 size printed markers. These markers would contain a pattern that was detectable by (...) (25 years ago, 30-Apr-99, to lugnet.robotics)
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