 | | 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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| | BrickOS
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I would like share a success story to give encouragement to others. I was able to get BrickOS 0.2.6.09 installed on my computer. I'm far from being a computer expert and would consider myself a beginner. I didn't use the pre-built compiler available (...) (23 years ago, 1-Dec-02, to lugnet.robotics)
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| | RCX Tank Base
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(...) A rotating disk with one or two teeth is much easier and very effective. You can store a lot of energy that way. My finger still hurts from where I was experimenting yesterday with a 5cm steel bar on a cheap motor. With an axe it's difficult (...) (23 years ago, 1-Dec-02, to lugnet.robotics)
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| | Re: hovercraft
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Paul, this looks really impressive. For such nice developments I alwasy have room, so if you're interested to make use of the space I've avaiable, contact me at nospam_s.mientki@mailbox.kun.nl (remove "nospam_") best regards, Stef Mientki (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Re: hovercraft
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Pixel: Congratulations. (...) WOW!! I want to type a bunch of stuff.. but I'm overwhelmed. (...) One small point. If you have access to a volt meter, could you check if your wall transformer really is putting out 12Vdc. Many of those adjustable (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | serial tower programming driver for windows 2000?
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I want to know if there is a driver of a specific sort that is done for windows 2000? /M (23 years ago, 1-Dec-02, to lugnet.robotics)
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| | hovercraft
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hi all now i think it's time to present you my application of as pure as possible lego hovercraft (URL) got 5 movies in mov format but my site is too small so if someone has some room for my movies... all of them have 19.3M the only one tricky point (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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"Jim Choate" <lego-robotics@crynwr.com> wrote in message news:Pine.LNX.4.33.0...ssz.com... (...) no comments man! i've been asking rhetotical :)))) i've got fun experimenting even if i know they lead to nowhere (...) what is with your sense of (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Suggestion: Provide precompiled Cygwin h8300 gcc+binutils, downloadable via Cygwin setup.
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Compiling your own compiler is undoubtably the hardest barrier of entry to brickos. I suggest that the h8300 binutils and gcc be distributed as Cygwin packages from the brickos website. This would simplify the install to merely running Cygwin setup, (...) (23 years ago, 30-Nov-02, to lugnet.robotics.rcx.legos)
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| | RCX Tank Base
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I've finally posted pictures of my RCX Tank Base: (URL) of the RCX Tank Base One include: ==>Remote driving using the Ultimate Accessories remote. ==>Suspension using ten black spring mounts. ==>"Equal" forward driving using a 24 gear clutch and (...) (23 years ago, 30-Nov-02, to lugnet.technic, lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) We're not talking about hovercraft here at -all-. We -are- talking about the assertion that 'mass is equivalent to weight on the planet Earth'. It isn't, ever. A vector is -never- equivalent to a scalar, basic dimensional analysis; basic (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) And if we were talking about a hovercraft in an elevator - I'd be agreeing with you. Dumb pedantry doesn't work here. The **WEIGHT** of the hovercraft is just as important/relevent/applicable as the **MASS** of the hovercraft when we are (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) Ok, remember you asked... Let's take example 1- You're in an elevator. The elevator goes down. Your weight decreases but your mass does not. Q: Where did the weight go? Did you mass change? Example 2- Take a 1lb weight and a scale. Scenario a: (...) (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) How? It seems to me that as long as acceleration due to gravity is constant (i.e. same altitude, same planet; in this case, 9.8 m/s/s) then weight and mass have a simple proportional relationship. (23 years ago, 30-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) That's a pretty basic physics mistake <shrug>. -- ___...___ We don't see things as they are, ravage@ssz.com we see them as we are. www.ssz.com jchoate@open-forge.org Anais Nin www.open-forge.org ---...--- (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) So long as we are down here on the surface of the earth talking about the air pressure under the skirt of a hovercraft and whether it'll lift or not, weight and mass are equivelent concepts. (...) Yes - I understand that. (...) Yes...although (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) I think you need a MUCH bigger area under the craft. If all the motors and stuff on top weighed (say) 100 grams, and you have just 16cm diameter skirt then you need a pressure of: 0.1 / (PI x 0.008 x 0.008 ) kilograms/square meter ...in order (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) So is Hans Madsen on this list? I'm always skeptical of things that are just throwaway lines like that...was this pure lego? How much cheating was involved? There was a couple of photos of a lego helocopter that could really fly on the list a (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) We aren't interested in power, we're interested in moving a volume of air. They are very fast, high rpm. Trade off rpm with suitable gearing. You may need two or more (which is why small may be better). I've never used them myself except for (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) Get rid of this fixation with 'lift own weight' (you're -completely- ignoring the -primary- factor of time). Consider the exhaust of a car, pump it into a bag and you can lift the car to change the tire but you can stop the car by simply (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) There's an echo in here ;)...you'll get to the answer faster if you'll think of mass and force instead of weight. (...) Which is where the ratio of the input plenum to the skirt (the output plenum) comes into play. (...) No, that's a function (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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I just tried a 5V processor cooling fan a 12V computer PSU cooling fan a 3V ducted fan of the sort used to cool your face (run at 5V without on-board batteries) with a 16cm dia polystyrene plenum. None could really lift their own weight - although (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) I was thinking of more a complete LEGO solution--the only thing non-LEGO in my plans is the skirt, which probably will be a bicycle innertube. What I plan first is to get hte motor, the fan and turn it on and see if I can dry my hair with it (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) You'll have to answer that for yourself. A lot of what I find fun would probably bore/scare most to death. For example, I find all these transformers and such that a lot of Mindstorm folks rave over completely and utterly uninteresting, and (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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Hi Dave :) (...) Cool :) (...) I'm thinking of a thin "plastic film" usually used to wrap around food to keep it fresh and air tight (I don't know how's it called in english). mc. (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) When I was about to give up, after some tests with a non-LEGO propeller and *without* a "skirt", I saw this interview of LEGO Master Builder Hans Madsen ((URL) where he says he made one (I assume) *LEGO* "Hovercraft that really flies": "What (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) to how to do it... After work I'm going home and rip apart my modified 8448, take the 8475 motors out of it, and throw on a znap prop on those motors and see what the air flow's like. Putting my current project on hold, I'll try and whip (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) Non-lego motor -- for lower weight and higher RPM. Non-lego skirt -- because there isn't anything in Lego that can do that. Non-lego propellor -- because the Lego ones are crap Non-lego decking -- for lightness and rigidity. ...hmmm it's (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) The micro cars (the ones about an inch long) are down to $30 - including two channel RC and battery charger. However, the motors aren't all that powerful. I read somewhere that the motors they are using are from the 'vibrators' inside pagers (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) You know that the pressure of the air inside the skirt multiplied by the area of the ground enclosed by the skirt has to equal the weight of the hovercraft. If the skirt made a perfect leak-proof seal against the ground, and there were no (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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but wher is the fun? my skirt has been done as a cut of the sphere the same shapa as the tunnel has to hav (i think) so it was a middle part of sphere without upper and lower domes that's why i said "a little bit hard to do it" :)) you said CD is (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) Bingo. (...) Take a look at some of these micro motors that are being used in the new mini-RC cars. You can buy a whole car kit, radio, and controller for about $75US. (...) A helo tail rotor is your best bet. Wood or a composite is your best (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) It's not one formula. The first hurdle is to balance the force of gravity. F=ma m is the weight of the hovercract assembly. a is the -negative- acceleration due to gravity. F is the total force the fan must provide. Then you've got to figure (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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hi! so i did tests and my discoveries are sad 1. pure turbine has to be placed in some kind of tunnel but not exactly funnel the tunnel has to be as a part of ball (sphere) without hats :)) at the upper and the lower side because the stream of air (...) (23 years ago, 29-Nov-02, to lugnet.robotics)
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| | Re: legOS 0.2.6 installation problems - a better way?
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(...) Thanks Max, I have now got the latest version of BrickOS and will try to reinstall cygwin. Thanks for your help. John. (23 years ago, 29-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: legOS 0.2.6 installation problems - a better way?
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(...) Weird. Sounds like your install of Cygwin is corrupt. Max. (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: legOS 0.2.6 installation problems - a better way?
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(...) Thanks Max, in running the instructions mentioned above, I entered the following in a bash shell, with the following responses. Sorry about the volume of this but it is all there. Any answers would be appreciated. $ cd /legos-0.2.6 $ make (...) (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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(...) LOL! No ! I myself am doing tests with a non-LEGO one also. it would be nice if it could use a LEGO motor... and material usually found in every home, so anyone could build one... if we ever find a way to make it possible. (...) Yep. Do you (...) (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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if i will use non lego or znap propeler will you disqualificate me? :) be cause IMO some kind of turbine is needed here i'll try to do it tonight (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | Re: Motor Control Register (0xf000)
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The lugnet registration takes forever :) After reading this post a light went on in my head. A few weeks ago I wrote a multi-threaded program for the RCX (about 7 threads, each running an endless loop). When I added one more thread, the robot (...) (23 years ago, 27-Nov-02, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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pixel wrote (...) yup, I confirmed that yesterday :/ though now I have a nice ZNAP micro ventilator, for the hot summer, ehehe now... let's see what happens tonight, with the 9v ungeared LEGO motor and a non-LEGO propeller together with an "air (...) (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | Re: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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no! cpu fan doesn't work in this aplication even if you increase voltage 2 times pixel "Marco Correia" <lego-robotics@crynwr.com> wrote in message news:000a01c2963b$e3...rcel.pt... (...) maybe... (...) also. (...) (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | Re: legOS 0.2.6 installation problems - a better way?
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(...) Yes, the install of LegOS/BrickOS is quite difficult for those of us who have never used Unix/Linix. Once you've downloaded the cygwin tools, I believe you can change versions of LegOS/BrickOS without much problem. You don't need to DL more (...) (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: legOS 0.2.6 installation problems - a better way?
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(...) Specifics would be helpful. Max. (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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While doing my initial searches to check if this could be done, I found this: (URL) a look at this: "What is the coolest model you have ever built? Apart from the destroyer I mentioned above, I think that the coolest models I have made are the (...) (23 years ago, 28-Nov-02, to lugnet.robotics, lugnet.lego.direct)
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| | Re: Line following algorithms
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(...) *smacks my forehead with my palm* But of course! Best, /Tobbe (URL) SPAM when e-mailing) (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | legOS 0.2.6 installation problems - a better way?
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I have been trying Set up LegOS for some time now. My first attempt using winlegOS was installed but I then found out then that it could not communicate via my usb tower. I then decided to go for the full installation of Cygwin and legos0.2.6 and (...) (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: Line following algorithms
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(...) Mission well nigh impossible, I think. (...) One light ensor is ok for starters. It's not difficult to get an additional light sensor. Most of us think the RIS should have come with 2 light sensors in the first place. (...) Have a look at some (...) (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | Re: RIS 1.5 $99
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If you ordered one of these from KB-Toys.com and they sent you the French version. Firstly, call LEGO and have them send you the English instructions / CD-ROM, if you don't already have english version. Second, call KB-Toys and complain. First of (...) (23 years ago, 28-Nov-02, to lugnet.robotics)
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| | Re: Polling sensor values with wait_event
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Thomas, I had a thought about this situation. You could write a function that sets a flag when the event is triggered, do nothing otherwise. You could call this function from within each of the tasks you write (at a somewhat high frequency ... say (...) (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: problem building gcc for brickOS-02.6.09 installation under windows xp
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Marko, <snip> (...) You can simply decompress the files from the archive at: (URL) are already built and nearly ready to use. Once they are decompressed, I believe you just run the BrickOS configure script; then you should be ready to go. // Joe (23 years ago, 28-Nov-02, to lugnet.robotics.rcx.legos)
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| | Robolab - lejOS communication
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Hi all, we are working on our final thesis using lego mindstorms. Our goal is to implement a neural network using the backpropagation algorithm. This neural network will then be used with a webcam for pattern recognition and classification. The (...) (23 years ago, 28-Nov-02, to lugnet.robotics.rcx, lugnet.robotics, lugnet.robotics.rcx.java, lugnet.robotics.rcx.robolab)
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| | Re: Line following algorithms
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(...) Cool, this book is now high on my wish list. (...) I think that developing a good working solution that drives the robot both fast and precisely over the track, and still uses only 1 light sensor would be the ideal solution. I´m still (...) (23 years ago, 27-Nov-02, to lugnet.robotics)
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| | Re: Line following algorithms
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(...) I guess that an improvement can be: If the sensor is on track for more than an specified time, the bot can seek at first at the opposite site as he found it the last time. Of course, it will not be bullet proof, but it may work, I´ll give it a (...) (23 years ago, 27-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) Yes, I think our team would enjoy that, also. And I would like to use the same table. Please tell me what you find out Steve (23 years ago, 27-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) of the 4'x8' table I already have. I'm thinking this would be a great off-season (off the First Lego League season) activity for my FLL team and perhaps other nearby. I've sent an email to someone at FIRST to see if they have a contact at 3M (...) (23 years ago, 27-Nov-02, to lugnet.robotics)
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| | Re: RCX and batteries
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(...) Yes, it has a bridge rectifier, I use the 10V AC supply that comes with the LEGO train controllers. ROSCO (23 years ago, 27-Nov-02, to lugnet.robotics)
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| | Re: Newbie has an idea - Nascar style racing?
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(...) Acroname has a line following mat, which I believe is made of the same material. It costs $65. (US) I didn't see the dimensions. (URL) (23 years ago, 27-Nov-02, to lugnet.robotics)
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| | Re: problem building gcc for brickOS-02.6.09 installation under windows xp
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Hello John, thanks for your help. I have found the link and I will reinstall cygwin. Since I am a 'beginner' here, are there any guidelines for me how to work with the prebuild binaries? As I say, I have no unix experiences and would need to know (...) (23 years ago, 27-Nov-02, to lugnet.robotics.rcx.legos)
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| | Re: problem building gcc for brickOS-02.6.09 installation under windows xp
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(...) Your cygwin installation is not working correctly. You shouldn't be experiencing any instabality as a result of running cygwin & unix commands. I would uninstall cygwin and try reinstalling it. And then I would not try to build the gcc cross (...) (23 years ago, 27-Nov-02, to lugnet.robotics.rcx.legos)
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| | Cygwin under Virtual PC on OS X
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Having no luck getting BrickOS and the cross compiler package to build under Mac OS X 10.2.2, I thought I'd try moving my previously working djgpp directories and LegOS 0.2.4 directories to a Virtual PC DOS session...only to remember that djgpp (...) (23 years ago, 27-Nov-02, to lugnet.robotics.rcx.legos)
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