 | | STriDER 2.0 -- tripedal robot
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This robot walks on three legs, but not in the way you'd expect: (URL) (17 years ago, 25-Sep-07, to lugnet.robotics, lugnet.technic)
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| | Cirque des Sciences
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For those who want to meet our robot team, sharing older and more recent robot creations "life", you are invited to the Luxembourg "Cirque des Sciences" ((URL) that will happen this weekend. There will be GASTON, Erik's xy-plotter, (...) (17 years ago, 20-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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(...) Yes this works fine, just using a normal sensorcable ! Another simple out of the box solution is: first Master NXT connects to other remote pbLUa consoles by bluetooth.... The master can send Lua commands directly to remote NXT and is able to (...) (17 years ago, 19-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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The City Harbor boat hull is plenty big to hold an RCX or an NXT. It could hold three of them end to end, actually. There are studs on the bottom of the hold and along the top, so you could build a cage for an NXT or just stick the RCX directly onto (...) (17 years ago, 19-Sep-07, to lugnet.robotics, FTX)
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| | Re: Power-Functions extension wires
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(...) I've been wondering this myself. I thought it would be soon seeing as the bulldozer came out ahead of schedule, but now it looks like the cables wont be here before october. (17 years ago, 18-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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(...) pbLua supports communication over the RS485(?) port. That's sensor port 4. Using that port, you can connect several NXTs together. You just need a cable that connects to several ports. Steve (17 years ago, 18-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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I suspect that with the proper software (and maybe a special cable), the I2C protocol can be used to network between NXT controllers. I2C is a multi master bus with collision detection, so it "should" work. It's just a SMOP [Small Matter of (...) (17 years ago, 18-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) It's a good thought - in fact, my first attempt was to use the front treaded "flippers" on LNE/Packbot so that Packbot could drive onto a "floatation frame", and either power or deploy its own "water tread" propulsion. That idea fell afoul of (...) (17 years ago, 17-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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[Cross-posted to lugnet.robotics as it's on-topic there] (...) There's no absolutely transparent way to make a program running on one NXT address the sensor or motor ports of a 2nd (or 3rd, or 4th) NXT. However, a lot of solutions to this problem (...) (17 years ago, 17-Sep-07, to lugnet.technic, lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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Not that I've tried it (of course) but it seems that if were to use the treads with small paddles attached, it would push the splashing part to the rear, give skid steering, and sill provide good propulsion, similar to the corkscrew idea. Chain (...) (17 years ago, 17-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Oars are nothing but highly asymmetric paddle wheels. Yes, I know, that's a bit simplified, but still splashes a lot unless you have the high amount of control over force curves, blade angle, etc. that an experienced rower has. Just check out (...) (17 years ago, 15-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Oars! (17 years ago, 15-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) never had (...) gears (...) turned (...) A Thai style Long-tailed-boat may be easier to build and would keep the motor out of the water. No rudder - just rotate the engine. Peter (17 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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Zitat von Brian Davis <brdavis@iusb.edu>: (...) Sails. The motors used to trim them according to the direction and strength of the wind. ---...--- This message was sent using IMP, the Internet Messaging Program. (17 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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OK - Since you beat me to that one how about magnetohydrodynamic propulsion (thought that might be hard with stock Lego :) Or more realistically, how about counter-rotating screw drives, like this one: (URL) be able to make something like it by (...) (17 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Airboat? Though I don't know if you could drive a large enough prop fast enough to move you... -Rob A> (17 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Good idea, and I should have added that to the list. But a high-thrust LEGO air propeller or fan seems to be even tougher to make than a water propeller. There's been a lot of discussion in the past about LEGO hovercraft, but it's rather hard (...) (17 years ago, 14-Sep-07, to lugnet.robotics)
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| | 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 (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Airboat! (17 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Those are a good all-LEGO solution... but they tend to splash. A lot. This isn't fatal, but means either "splash shielding" the electronics (which requires more weight), or making the entire robot bigger (so the splashing wheels aren't close (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
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