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(...) A straight tri-wheel like that can't climb anything higher than half it's height though. If you are really after something that'll climb TALL steps, then it has to have something high up at the front to grab the top of the step with. Even a (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: Need to compare
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Ok, so, the complete description.... It's not really a competition, but a project for students in my university... We have to build a bot with LEGO mindstorms... This bot has to be able to follow a line on a ground made in steel. This line goes (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: Need to compare
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(...) Oh - that's a pain. (...) Well, I guess it depends on how rough the terrain in general is. If it's a flat, smooth surface with just one 5cm hole - then practically any vehicle with (say) 6 wheels will drive across it like it wasn't there. (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | 2 rcx's
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What would happen if you took a wire from a sensor port on one rcx and connected it to a motor output on another rcx. Would this be a viable way to communicate with 2 rcx's if they could not be position for IR communication? My thought was that you (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: Need to compare
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(...) I like the tri-wheel design. If you make if big enough it shouldn't have any trouble. Something like this (or bigger): (URL)For the step, it begins at 1cm and it will be increased until no véhicule is (...) The advantage of an ODEX design. (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: Need to compare
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Thanks, Yes, it's the maximum dimensions... We have already seen the shrimp and we think to build something like that (maybe also with tri-star wheels)... But if somebody find a better solution, because we don't know the comportement of the shrimp (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: some more questions about lnp.
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The frequency of the RCX's IR does not change at all: " The RCX uses a 38kHz carrier, which is pretty typical for TV remotes. As for the sampling rate, the RCX runs at 2400 bps, which makes each bit approx 417us " (URL) think the only way you could (...) (23 years ago, 28-Sep-02, to lugnet.robotics.rcx.legos)
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| | Re: Need to compare
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(...) Is that the *initial* dimensions - or the *maximum* dimensions? If it's just one of those things like "the robot must start off in a box no bigger than 30x60x30" - then it can just fold itself up into that space when they are doing the (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: Need to compare
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Thank you for your idea... but I forgot to say you that I have restriction for the dimensions... Dimensions : height : 30cm Lenght : 60cm width : 30cm And we can have 620 Euro's... Bye Vincent ----- Original Message ----- From: "Mike Thorn" (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: Need to compare
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Vincent, (...) Without knowing the limitations of your resources, I would vote for a legged vehicle. You can make if large enough that even if a leg did go in the hole it wouldn't fall in or get stuck, you could make it with as many legs as you like (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Need to compare
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Hello everybody, For my university, we must construct a bot with LEGO Mindstorms. This bot has to be able to climb a step, to ride above a (little) whole and to have left and right wheels at different height. In fact, he might be able to go (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Re: some more questions about lnp.
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duh... guess i was kinda wrong here.. IR is in reality a frequency defined from A to B. any messages sent within this spectre is said to be IR messages. so in theory sending an IR message closer to A than B from one RCX. and at the same time sending (...) (23 years ago, 28-Sep-02, to lugnet.robotics.rcx.legos)
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| | Re: Watch Dog Timer on the H8 - Working!
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Well, after browsing through the H8 reference another, oh 20 (?), times; and some messing around; it is now working. Basically, I had declared the Control Status Register as an 8 bit value. Since this is a special register (8 bit) that requires a 16 (...) (23 years ago, 28-Sep-02, to lugnet.robotics.rcx)
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| | Re: Following the Line Follower
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(...) Hi Steve, I tried your suggestion to improve on the single-sensor line follower. Well, actually I just used the left light sensor on my 2-sensor bot and a standard single-sensor line following program. Like you said, the bot is now able to (...) (23 years ago, 28-Sep-02, to lugnet.robotics)
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| | Watch Dog Timer on the H8
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Has anyone been able to make use of the Watch Dog Timer on the RCX? The H8 documentation seems to spell out the workings quite well. BrickOS (LegOS) has minimal support (a vector is declared for both NMI and overflow) and pbForth files list the WDT (...) (23 years ago, 27-Sep-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: WebCam & Linux
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Thank you for your response, Jürgen! (...) I believe I also have Linux kernel version 2.4.19 (# kernelversion => 2.4), and I tried to use both xawtv and quickcam-tt's testquickcam app. Both responded with that they were unable to open 'video0' (or (...) (23 years ago, 27-Sep-02, to lugnet.robotics)
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| | absolute reckoning, all lego solution?
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after reading all the posts i did break down and get a spybot: gigamesh so far fairly impressed due to the fiberoptics pieces, the new gears and the idea of a tri-star wheel without a tri-star wheel. but on to my point. the spybotics controllers (...) (23 years ago, 27-Sep-02, to lugnet.robotics)
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| | some more questions about lnp.
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ok, im back again with even more questions. when i created my last program using lnp on an RCX i did a mistake by setting the same port as the one im listening on and the one im sending on. this made me think. what is the reason we use two different (...) (23 years ago, 27-Sep-02, to lugnet.robotics.rcx.legos)
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| | Robotics Education Project
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From the Internet Scout project.. Robotics Education Project (URL) Robotics Education Project is intended to raise children's interest in robotics and promote it as a possible career choice. The Web site highlights many applications of robots, such (...) (23 years ago, 27-Sep-02, to lugnet.robotics)
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| | Re: Following the Line Follower
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It might be worth trying to increase the area that the light sensor is seeing by putting some kind of a lens in front of it. If the sensor could see (say) a roughly circular region 3 centimeters across then numbers you'd read between the 'white' and (...) (23 years ago, 27-Sep-02, to lugnet.robotics)
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