Subject:
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Re: LOGO with Mindstorms
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 31 Dec 1998 14:34:59 GMT
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Original-From:
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Laurentino Martins <lmartins@marktest.%avoidspam%pt>
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Viewed:
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1899 times
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At 14:18 31-12-1998 Thursday , you wrote:
> Hi, I've just bought Mindstorms to implement a long-standing urge of mine:
> to acquire a Logo turtle for educational purposes. Seymore Papaert was a
> long-time proposent of LOGO and directed many thesis on its use in
> exploring and enhancing the development oa primarily
> quantitative/mathematical concepts in children. He and others used,
> perticularly in their early work, a small processor mounted on a circular
> plate covered with a plexiglass half-sphere. Beneath the plate extend two
> wheels, independently driven, pointing in the same direction, ("head' to
> "Tail"). In addition there is a ball-point pen which can be set down to
> leave a trail or picked up to stop the trail. By running the two wheels
> in the same direction the turtle could go "forward" or "back". By turning
> the wheels in opposite directions, the tutle could rotate "right" or
> "left". That set of four commands plus "penup" and "pendown" allowed the
> programmer to draw designs on the table/floor, build small commands such
> as "triangle" as procedures in LOGO and so permit great flexibility in
> patterns to be constructed by children and graduate students...
I've built a room mapper using a CyberMaster with quite success.
Au contraire of the RCX, the internal tachometers are very precise and I'm still astonished by the similarity of the pattern drawn in the PC screen (in a program of my own) and the patterns it "draws" in the floor.
After 2 or 3 minutes of driving in the floor, and using *only* the tachometers to calculate it's position and direction, it still knows where is "north" with a precision of 25 degrees or less, which if very good.
I didn't yet had the time to fine-tune the routine, but I think I can make it even more precise with some debugging.
Returning to your turtle project, I think you will have some difficulty of implementing a precise driving mechanism without some rotation sensors in the wheels, but that's only my opinion.
Laurentino Martins *<||:-)
[mailto:lau@mail.telepac.pt]
[http://www.terravista.pt/Enseada/2808/]
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: LOGO with Mindstorms
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| Hi, Laurentino, Thanks for the speedy response. (...) of mine: (...) . . . (...) Goed! I'm not quite sure what CyberMaster IS but it seems to be based on RCX and so accessible to what I have. THe LEGO site has a reference to a Cybermaster site but I (...) (26 years ago, 31-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | BASIC like programming alternatives?
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| I just discovered that my reliable VB 3.0 won't allow me to program the spirit.ocx. What other BASIC-like programming alternatives are out there? I want to write some reasonably sophisticated programs, but I'm afraid I don't know C... Thanks! -- (...) (26 years ago, 22-Dec-98, to lugnet.robotics)
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