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(...) Yup, that would work too. Sometimes good deals can be had on these if you keep your eyes open. Especially on the blue ones if you're not fussy about color. (...) That seems to work a lot better for picking motion up from the rails than for (...) (24 years ago, 27-Dec-01, to lugnet.robotics, lugnet.trains)
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| | Re: Mindstorms on RailRoad?
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In lugnet.robotics, Larry Pieniazek writes: <snip> (...) Why not use the old 4.5volt rails? (Presuming Steve has or can get some...) Or, as for driving it, could the setup from the 4533 'track snow remover' (URL) used by driving the middle axle? I (...) (24 years ago, 27-Dec-01, to lugnet.robotics, lugnet.trains)
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| | Re: Mindstorms on RailRoad?
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(...) No problem, then. (that wasn't what you asked at first, you complained that the train motor took power from the track...) In that case just put *no* power on the rails (that is, run on some track not connected to any power) and feed one of the (...) (24 years ago, 27-Dec-01, to lugnet.robotics, lugnet.trains)
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| | Re: Mindstorms on RailRoad?
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(...) Lego (...) Isn't that the seme thing? If you modify the train motor to accept power from the RCX, you have wheels that roll nicely on the train track. Anyway, have you tried the small yellow/white wheels that come with the solid rubber tires? (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Mindstorms on RailRoad?
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(...) I don't mind that the RCX is battery powered - I want to make a robot that happens to run on rails rather than some long running train that happens to have an RCX onboard. I don't really want to use the train motor at all (modified or not). (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Mindstorms on RailRoad?
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(...) This is a recurring topic in .trains and the consensus seems to be that a mobile RCX brick requires either that it is battery powered (not great for battery life), or that you do surgery on the motor. The surgery that needs to be done is well (...) (24 years ago, 27-Dec-01, to lugnet.robotics, lugnet.trains)
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| | Mindstorms on RailRoad?
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I got my son a Lego Train set for Xmas - and have been trying to figure out how to build a Mindstorms robot to run on Lego train track. * The Train motor isn't much use since it picks it's power (and hence speed and direction) from the track. * The (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Lego patents
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(...) That can't be true. You are saying that you couldn't patent a machine because it's made from standard parts? People patent electronic devices made from off-the-shelf logic chips all the time. I don't see any legal reason why a Lego machine (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: ROBOLAB 2.5 (USB) woes with Mac OS 9.2
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This morning I tried reinstalling ROBOLAB, and now it works. I wish I knew why... Dean (...) (24 years ago, 27-Dec-01, to lugnet.robotics.rcx.robolab)
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| | RE: NQC with USB Port
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See (URL) Tecnología y Robótica (URL) ----- Original Message ----- From: Peter Krengel To: lego-robotics@crynwr.com Sent: Wednesday, December 26, 2001 10:36 PM Subject: NQC with USB Port Hi all there, my son got a RIS2 were the IR Power uses a USB (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Lego patents
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(...) This bears repeating, and ought to be heeded by those who wish to teach IP law or speak about it and be taken seriously... the correct term is a lot closer to "LEGO(r) brick" or "LEGO brand building element" than it is to "legos", and if you (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Lego patents
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(...) Actually, the distinction is simple... the legos are what is used to implement the invention -- the patent would surely not claim that the invention is due to the legos and is confined to existing only when implemented with legos. With that (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Lego patents
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(...) Just be sure that in your class you refer to them as "LEGO bricks" and not LEGOs. To do so would be doing your students a disservice. :) (...) This question isn't clear to me. Are you asking if someone can obtain a patent (or at least build a (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: Lego patents
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I did indeeed have a talk with Brad Justus amongst others at Brickfest. He was very positive about what we are trying to do with the caveat that Lego holds various patents, trademarks and copyrights which they guard closely, not surprisingly. Any (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: How to make shared memory....not
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(...) Yes, I'm sure I can. And I think it would be 'safer' that way. But Mike's idea about functions sounds interesting. I don't really have any idea about how I would use that in a real program, but it sure sounds interesting. Steve (24 years ago, 27-Dec-01, to lugnet.robotics.rcx.legos)
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| | Re: Lego patents
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I am not entirely sure what you are asking about, but maybe this will help... I met a guy at Brickfest earlier this year named John Barnes. John makes aftermarket sensors for Mindstorms, using third party electronics, but a modified Lego(TM) brick. (...) (24 years ago, 27-Dec-01, to lugnet.robotics)
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| | Re: How to make shared memory....not
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I think this is what you want, but I am still learning. :) int inc (int&); int dec (int&); int (*pFunc) (int); //pointer to a function that accepts/returns an int if (add) { pFunc = inc; } else { pFunc = dec; } int a = pFunc(10); So, if add is true, (...) (24 years ago, 27-Dec-01, to lugnet.robotics.rcx.legos)
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| | Re: How to make shared memory....not
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(...) ooohh. I like that idea. So I can write one program with all my functions and my other programs can just include a couple function calls. Again, in my VB world, I don't mess with pointers. When you have a minute, can you type up a sample (...) (24 years ago, 27-Dec-01, to lugnet.robotics.rcx.legos)
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| | Re: How to make shared memory....not
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(...) Yes. That is the only thing you have to do. You can store whatever you want. (...) Exactly. If you know you what you do, nothing bad can happen. BTW., this scheme can be extended to something like a shared library. If you store pointers to (...) (24 years ago, 27-Dec-01, to lugnet.robotics.rcx.legos)
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| | Re: How to make shared memory....not
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(...) Thanks, Michael. This appears to be exactly what I'm looking for. I assume if I want to store more values, I can just change the 'shared' struct, right? (add l, m, n...) When you say 'multitasking problems', you're talking about storing & (...) (24 years ago, 27-Dec-01, to lugnet.robotics.rcx.legos)
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