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 14:41:58 GMT
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Viewed:
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5827 times
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Brian Davis wrote:
> 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.
Brian,
Have you considered using some of those ZNAP flex axles and a LEGO
propellor?
Ralph
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Message has 2 Replies:
 | | Re: Serenity, an autonomous NXT-based boat
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| (...) Actually, I haven't thought of that - at least partially because I've never had those axles. But I would think that a vertical axle driving meshed crown gears to drive the horizontal propellor axle, or even an inclined axle that is turned (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
| | | RE: Serenity, an autonomous NXT-based boat
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| (...) I consider the ZNAP flex axles "not good enough" to be put to good use. Another useful item from the ZNAP collection, however, are the wheels. They have a turbine-like shape and from what I remember from past testing in the kitchen sink, they (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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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 (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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