Subject:
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Re: Serenity, an autonomous NXT-based boat
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 13 Sep 2007 16:40:45 GMT
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Viewed:
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4689 times
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In lugnet.robotics, Brian Davis wrote:
> In lugnet.robotics, Claude Baumann wrote:
>
> > ...absolutely cool!
>
> Thank you very much!
>
> > I would like to attract your attention to a rather old
> > Italian site (1999).
> > http://users.libero.it/riccardo.rocca/roboat.htm.
> > ...At that time a pioneer work!
>
> Actually, there still seem to be relatively few robotic water-craft around, to
> my surprise. That is an excellent project, and I'd not seen it. I'm also really
> glad I did not have to go the same route as he did (that's a heck of a magnetic
> compass sensor, for instance). I'd like to add a GPS unit to Serenity (or the
> next version - there's not a lot of "tonnage unallocated" with only two LEGO
> Fireboat hulls), BT connected to the NXT. This would seem a fun way to do this,
> and having an established positioning system would be vital.
>
> I'm not sure I have that quite a big lake, however - most places that size
> around here, on a good day my little Serenity would get run over by some
> motorboat. Perhaps it needs a flag to alert others, but then there's more wind
> drag... Fun problem.
>
> I'm not sure how long the little underwater motors will last - I suspect, driven
> by only 1 AA battery, these are likely the first things to "power down" on a
> long trip. I could get around this by using the NXT motors (geared faster
> probably), but then I need to make sure the NXT itself has enough power... and
> the fact that the web page you directed me to uses an exteranl Pb-acid battery
> is not reassuring :-).
>
> Long-term, I may have to hack a regulated DC power supply for the NXT, and have
> more batteries on board.
You know, what I like most with your project is that is such a refreshing, new
challenge, which - as you pointed out- surprisingly few people though of yet.
So, this might become a completely exciting NXT robot section. I think it was in
2005 that for the first time I saw RCX-driven underwater robots at the
International ROBOLAB Conference in Austin. All this inspires me to suggest this
kind of projects to my students this year. We have a beautiful lake here in
Luxembourg -artificial though-.
As to pure-LEGO. This might become difficult. Perhaps one could somehow use the
powerful all-terrain racer motor with battery pack. I'm not sure this is still
available.
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Serenity, an autonomous NXT-based boat
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| (...) Thank you very much! (...) Actually, there still seem to be relatively few robotic water-craft around, to my surprise. That is an excellent project, and I'd not seen it. I'm also really glad I did not have to go the same route as he did (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
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