 | | Re: Line following algorithms
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(...) I don't think there is really a good source for this information, yet. I'm planning on making a web page with information about line following, including event locations, in the near future. One place to look is the regular robot clubs. Like: (...) (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: hovercraft in motion
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(URL) (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: hovercraft in motion
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hi stef mientki gives the ability to see my hovercraft in motion thanx stef (URL) file soon (i hope today) depends on stef's free time :)) regards pixel (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: Another cement mixer......
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(...) Hi Tobbe, sorry for delay in replying you, I have pleasure in your comment. As you specified, main news on this model are RCX's applications. Really my target is building a big "work zone" technic figure scale with 3-4 interactive models (...) (23 years ago, 3-Dec-02, to lugnet.technic, lugnet.robotics, lugnet.general, lugnet.modelteam, lugnet.loc.it)
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| | Re: RCX Tank Base
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(...) Yeah, tell me about it. My latest MOC (still to be published) uses 1 x 6 plates on this type of treads and I made the MOC remote controlled and had to pick up a lot of plates when I was done driving. The treads have some serious flaws but are (...) (23 years ago, 3-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: hovercraft
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hi all again mission 1.5 completed it means i did big brother of my hovercraft so this is some data diameter of deck: 53 cm skirt length: 6 cm diameter of duct (tunnel): 15 cm height of tunnel: 8 cm i used lighter (thiner) film lighter scotch the (...) (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: hovercraft
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at last :)))) hi stef i'm interrested in sending you my movies converted to mpeg files if you are ready let me know i can sent movies sliced on about 2mb pieces i'm ready to send thanx a lot regards pixel (23 years ago, 3-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: Line following algorithms
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(...) Of course. But then, some are more "real" than others ;-) (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: RCX Tank Base
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Should have posted this hear Peter, (...) Alas, unfortunately I consider myself to be somewhat of a Lego purist, I look for almost pure Lego solution where I don't have to 'modify' bricks. If I started buying non-Lego stuff I'm afraid my hobby might (...) (23 years ago, 3-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: RCX Tank Base
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(...) When I was first designing the tank base I had assumed I would have to use an adder/subtractor to have straight driving. I spent a fair put of time playing with different A/S trying to fugure out which would be best to use. It was then that I (...) (23 years ago, 3-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: Line following algorithms
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All this talk of line following competitions has got me interested. Does anyone know if there are any such competitions in or around Minnesota? Also, what are the best places to look out for this kind of thing? Thanks, Gary (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: Using RIS and USB Tower on a Macintosh
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Hi, Dave, Thanks for the info; I shall pass it on. I have 8 or so serial towers we aren't using for class as we've switched to USB towers. So I can see if they can get that working under Virtual PC. Just as an aside and to answer the question (...) (23 years ago, 3-Dec-02, to lugnet.robotics)
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| | Re: Using TIS and USB Tower on a Macintosh
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(...) I have run the RIS 2.0 software under virtual PC (VPC 5.0, Windows 98) with the older serial tower via a Keyspan USB/serial adapter. I was never able to get the USB tower to work with VPC/RIS. If you *really* want to run the RIS software, then (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Using TIS and USB Tower on a Macintosh
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I have a student who is trying to use RIS 2.0 with Virtual PC on a Macintosh. LEGO says the drivers should be on the CDROM; the guy that sold them Virtual PC says it probably won't run the RIS 2.0. Can they run RIS 2.0 on a Mac? Can they use the USB (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) No good news. Scott Evans of US FIRST wrote that 3M only prepares this material for FLL and is not prepared to deal with individual requests. He suggested that spliced 36" printouts from a large format printer work well for him during testing. (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: hovercraft
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(...) did you remove the "nospam_", well now it's real mailto:s.mientki@mailbox.kun.nl Stef (23 years ago, 2-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: hovercraft
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Pure Lego propellors: I just tried using vehicle windshields as rotor blades. They actually work quite well. Their slope is extremely steep - but I guess that's what you want for small diameter propellors (ie a smaller hole in the top of your (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: hovercraft
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For people who are interested in chasing this goal, it would be interesting if people would post the weight (or mass - if you have a handy massometer :-) of your contraption - along with it's 'floor area' and the total 'skirt perimeter' length. (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: Line following algorithms
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(...) Well I suppose this statement applies to me since I have organized an event that limits the robots to a single light sensor. However, in my defense, I must say that the intent behind the rule was to make the game more fair for all competitors. (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: hovercraft
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(...) <snip> (...) Very nicely done! I tried the 8475 motors with the ZNAP props and it didn't generate a good enough force of air. Back to the drawing board! Keep up the great work! Dave K (23 years ago, 2-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: hovercraft
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(...) wait for movies i need some room for them but stef mientki is not available (undeliverable post :(( (...) yours. don't do too long skirt it drags on the surface and make a lot of resistance (...) the skirt has to be bent underneath the body it (...) (23 years ago, 2-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: RIS 1.5 & XP?
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Rob, Thanks for your help! Scott A (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | RE: RIS 1.5 & XP?
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Yes, it will. RIS 1.0 will also work on XP. Before installing any of the LEGO software on XP (or 2000, for that matter) I highly suggest downloading the latest versions of Quicktime, DirectX, and RealPlayer. The versions on the LEGO software were (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | RE: hovercraft
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Ok, just saw the pics. ...and you did it with a LEGO propeller ! WOW! :) (...) I think I'll have to make a much more flexible and long "skirt" like yours. Mine was half short and more rigid, so that's why it leaks more air. I'm also trying first to (...) (23 years ago, 2-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: hovercraft
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(...) i'll check but i'm almost sure about that (...) that's why i tied more voltage :) (...) it's set on my site now thanx for suggestion pix (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: hovercraft
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(...) i've got it on my disk so tell me where to put it :)) (...) new ver is much bigger but according to steve's words biger hovercraft should need less pressure so maybe 9V will be enough (...) my pleasure :) it's the effect of our talk here so (...) (23 years ago, 2-Dec-02, to lugnet.technic, lugnet.robotics)
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| | RE: hovercraft
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eheh :) so finally someone here made it ! Cool :) (...) That'd be cool to see. Please, tell us the final URL when you have it :) (...) I'm still trying with 9V, eh :) (...) I spent a couple of hours this past friday night, testing. I'll have to (...) (23 years ago, 2-Dec-02, to lugnet.technic, lugnet.robotics)
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| | RIS 1.5 & XP?
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Will it work? Scott A (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: RCX Tank Base
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(...) Why didn't you use a adder/subtracter? (...) If you mount the RCX and motors further back from the hand it will act as conter weight which should allow more lift load. (...) If you remove the 1x4 plates on the treads there will be less carpet (...) (23 years ago, 2-Dec-02, to lugnet.robotics)
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| | Re: C Compiler for Windows 98
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One thing I can tell you is that you need to add c:\cygwin\bin to your path (autoexec.bat) Also, when you try to download a program, instead of just using util/dll try ./util/dll I'm sure John will have other suggestions. You really need to get (...) (23 years ago, 2-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: C Compiler for Windows 98
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Thanks for the help! Sorry, but I have been out of town for Turkey Day and haven't had a chance to give it a try. Now I'm back, and the hair (which I've pulled out trying to get this thing to work) is starting to grow back and I would really like to (...) (23 years ago, 2-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Cygwin under Virtual PC on OS X
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David Chen <nospam-dcchen@pacbe...et-nospam> wrote in message news:nospam-dcchen-F...net.com... (...) David, What steps or instructions are you following to build the cross compiler on OS X? And from what source are you getting the cross compiler (...) (23 years ago, 2-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Motor Control Register (0xf000) and Memory Space 0xFDB0-0xFD7F
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This note is of interest to people who build their own RCX firmware. It provides some additiional insight to the recent post concerning dual use of upper memory range and the motor control register. There's a trade-off between real time performance (...) (23 years ago, 1-Dec-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Linker crashing
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(...) Known problem. Search this newsgroup. Last known working version: binutils-2.12. I've been fiddling with this recently, and believe it to be caused by something writing outside a malloced block, and trashing malloc's control information. (...) (23 years ago, 1-Dec-02, to lugnet.robotics.rcx.legos)
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| | Linker crashing
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I recently built binutils 2.13 for h8300-hitachi-hms target (default configuration otherwise) under Mandrake-Linux 9.0. When I use ld to generate an S-record file, it crashes ("Segmentation fault"), but still produces valid output. However, this (...) (23 years ago, 1-Dec-02, to lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | NQC 2.5 a3 released
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Anoter beta release of NQC at: (URL) one is really just an accumulation of minor features that I have added upon request for people (-R, goto, short branches, etc). Dave (23 years ago, 1-Dec-02, to lugnet.robotics.rcx.nqc)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) (Do you mean the "Lift Fan"? The "Thrust Fan" is the one that pushes the hovercraft forwards.) In the case of the lift fan, yes - because the pressure of the air in the skirt is higher than the air above the fan, it'll leak out anyway it can - (...) (23 years ago, 1-Dec-02, to lugnet.robotics)
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| | Vision Command under Linux / Kylix
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I've got a cheap VC package and started to play with it. Working mostly under Linux with brickOS, I would like to program the cam under Linux. It was no big problem to get it to work. I tested it with the xawtv program. Looks pretty good. Next step (...) (23 years ago, 1-Dec-02, to lugnet.robotics, lugnet.robotics.vc)
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| | Re: Robolab - lejOS communication
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(...) Mario, Lejos supports communication using the original firmware opcodes via the Serial class, but, apart from program download, this is designed for executing opcodes, not downloading data. F7Handler and F7DeliveryHandler are part of and (...) (23 years ago, 1-Dec-02, to lugnet.robotics.rcx, lugnet.robotics, lugnet.robotics.rcx.java, lugnet.robotics.rcx.robolab)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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Brushless DC motors, such as those used in PC cooling fans, won't generate enough power, even if the voltage is increased. This is because they actually have a switching circuit that changes polarity of the electromagnetic coils. I've gotten a small (...) (23 years ago, 1-Dec-02, to lugnet.robotics)
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