 | | Re: RCX vs. NXT
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(...) I thought these movies were hilarious and very clever. Glad that some of you fellow "LEGO geeks" enjoyed them. I know the kids that I work with will get a kick out of them. Tonya Witherspoon (URL) (18 years ago, 3-May-07, to lugnet.robotics)
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| | Re: RCX vs. NXT
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(...) I must say, I don't understand that comment. I'd agree that if you're looking for a fact-based comparison, this would not be the best source. But, if you're a LEGO geek (like many of us) looking for something funny, this is a good place to (...) (18 years ago, 3-May-07, to lugnet.robotics)
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| | Re: Ultra Sonic Sensor Readings
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(...) OK. I'll read up. At the moment, I'm staring at a midium size paper cup. I think I'll slice it in half and see how good a reflector it is. I suppose the studs on an 8x8 plate were probably acting like baffles in my last experiment. (18 years ago, 3-May-07, to lugnet.robotics)
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| | Re: RCX vs. NXT
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(...) Well the nxt guy has got to be Brandon who was also in action at Atlanta. (URL) (18 years ago, 3-May-07, to lugnet.robotics)
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| | RE: RCX vs. NXT
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No, these are for Lego-geeks only, who can recognize a Mac/PC parody using NXT/RCX instead. Very clever, kudos to the team that put them together. Alas, if you're looking for an academic comparison between the two, this isn't the place to find it. (...) (18 years ago, 3-May-07, to lugnet.robotics)
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| | Re: RCX vs. NXT
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(...) LOL they're actually quite funny (the NXT/RCX ones, not MAC/PC). Especially rookie.mov. ROSCO (18 years ago, 2-May-07, to lugnet.robotics)
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| | Re: RCX vs. NXT
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(...) Full of lies, distortions and half-truths? I'll skip it, thanks. (18 years ago, 2-May-07, to lugnet.robotics)
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| | RCX vs. NXT
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Check out these cool video clips about the RCX vs NXT from Iowa State University's College of Engineering. They are similar to the Mac vs. PC ads. (URL) click on NXT vs. RCX videos on the right hand side of the page. ___...___ Tonya Witherspoon (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | Re: RCX Motor Diagnostic Test
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(...) So ultimately you want as many matched pairs of motors as possible? I'm not at all sure why you need Robolab for this. 1) Set up all motors with identical loads (identical weights on strings hanging from pulleys, for example). 2) Power all (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | Re: Ultra Sonic Sensor Readings
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(...) No, but I can think of some ways to generate such data. Part of the problem is that weather or not the sensor sees a return depends on two spread functions: the spread of sound energy from the transmitter, and the spread fo sound energy (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | Re: Ultra Sonic Sensor Readings
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(...) Getting a return off a cylindrical or worse yet, spherical object is very difficult. The sound reflects off in every direction, pretty uniformly, and so little of it comes back to the sensor. I'm not sure about your idea for using multiple (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | Do you like functional programming?
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Message text written by "Jordan Bradford" (...) (URL) Lambda the Ultimate>: As you may know, we've been dicussing embedded language deign on the SRS group recently. May I post a copy of your email there? I'm reaaly going to have to read the (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | Re: RCX Motor Diagnostic Test
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Just a few general remarks on your setup/questions. There's a nice setup shown on Philo's page from when he compared the different LEGO motors, including some data sheets - maybe this is the type of data sheet you'd like to get? link: (URL) using a (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | RCX Motor Diagnostic Test
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Hello. I've been thinking for a while about the best way to test a large quantity of motors in a short period of time. The reason behind this is I mentor an FLL team, and we recently acquired somewhere in the vicinity of 50-100 motors from a (...) (18 years ago, 2-May-07, to lugnet.robotics, FTX)
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| | Ultra Sonic Sensor Readings
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I've read the previous postings on the ultrasonic (aka "echo locator" among my students). I'm experimenting to see what the cone of energy looks like. Does anyone have experimental data I can compare to? I also need advice of detecting the scatter. (...) (18 years ago, 2-May-07, to lugnet.robotics)
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| | Re: Control Lab - serial/USB
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(...) That's great news! It's good to have confirmation about the USB-Serial converter. Also, virually the only reason why I still use Windows occasionally is because of some LEGO apps that won't run on anything else. Have you made a gui, or in what (...) (18 years ago, 1-May-07, to lugnet.robotics)
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| | Re: Control Lab - serial/USB
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(...) I'd be interested in seeing it, if you don't mind. I also was going to use the Control Lab to control big train layouts, now that I actually have more than one LEGO train to control. :) (18 years ago, 1-May-07, to lugnet.robotics, FTX)
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| | Re: Control Lab - serial/USB
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(...) Yes, you can compile C# programs on the command line using the .NET Framework SDK. You can also install Visual C# 2005 Express Edition and use Microsoft's Visual Studio IDE. The API I'm designing won't be quite like NQC, though. NQC is (...) (18 years ago, 1-May-07, to lugnet.robotics, FTX)
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| | Re: Control Lab - serial/USB
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(...) I'm in the same boat as Doug, not having a control lab, but using several USB-> serial converters. I have had mixed experiences. Some converters have worked on everything I've tried (like my trusty Belkin F5U103-- no longer in production) (...) (18 years ago, 1-May-07, to lugnet.robotics)
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| | Re: Control Lab - serial/USB
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(...) I'm currently finishing an API in Java for the Control Lab (well, the missing part of code is for the temperature sensor...) My first project using it was the automatic control of a train yard during our last train show in Paris. (URL) For (...) (18 years ago, 1-May-07, to lugnet.robotics, FTX)
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| | Re: Control Lab - serial/USB
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|
(...) I know lejos exists... but I'm still getting to grips with NQC (if you know any good advanced tutorials except for the one Dave Boum wrote I'd be really interested). Would what you are developing be in any way like using NQC (possibly from the (...) (18 years ago, 1-May-07, to lugnet.robotics)
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| |
| | Do you like functional programming?
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|
If so, this might be of interest to you. I saw it posted on (URL) Lambda the Ultimate>: (URL) The first article is entitled "A Recipe for controlling Lego using Lava." If you're not familiar with the (URL) Lava Hardware Description Language>, it's a (...) (18 years ago, 1-May-07, to lugnet.robotics, FTX)
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| | Re: Control Lab - serial/USB
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(...) I've been working on a .NET-based class (in C#) to communicate with the Control Lab. It will eventually be a miniature API providing methods to poll sensors and change output port values. It will be kind of like how leJOS does things, except (...) (18 years ago, 1-May-07, to lugnet.robotics)
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| | Re: Control Lab - serial/USB
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I have Robolab 2.5.4 so I guess I'll be using that. I still need to find out what other apps there are (Windows and Linux) that I might use as an alternative. linmix (...) (18 years ago, 1-May-07, to lugnet.robotics)
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| | Re: Control Lab - serial/USB
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(...) I do not have a Control Lab but I do have two USB->Serial converters and have tested them on a variety of devices at work and have not had any issues yet. These come with device drivers that create serial ports on your machine. As long as the (...) (18 years ago, 1-May-07, to lugnet.robotics)
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| |
| | Re: NXTOffRoad+Extensionboard
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(...) Hi, it was my 5 years old daughter, who is escaping from running NXT :-D. The older one (and me) is playing the solo guitar at the background :-) It makes us happy that you enjoy the simple video of family-home-fun with Lego. Yes, it it hard (...) (18 years ago, 30-Apr-07, to lugnet.robotics)
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| | Re: Robo Quad - Stage Six
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(...) TY, If you understand the principles, it is a matter of just having the Lego, and the drive to build it. IMHO. Hopefuly learn a few things along the way. (...) I can only test it 12 inches in either direction at a time, uh confines of my desk. (...) (18 years ago, 30-Apr-07, to lugnet.technic, lugnet.robotics, FTX)
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| | Re: NXTOffRoad+Extensionboard
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(...) fun avoiding it :-). How often does the front lip hit the ground, or does it just clear (it's hard to tel from the video)? And from my schlecht Deutsch, yes, it does look ahrd to control or stop, and i'll be curious to see it under autonomous (...) (18 years ago, 30-Apr-07, to lugnet.robotics)
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| | Re: Robo Quad - Stage Six
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Very amazing work Eric. There are not many builders who can make articulated walking (or roller scating) robots that work- especially at that scale. This one appears very complex and large. What does your cat think of it? Have you ever taken one of (...) (18 years ago, 30-Apr-07, to lugnet.technic, lugnet.robotics, FTX)
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| | Re: NXTOffRoad+Extensionboard
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(...) Enjoy the simple NXTOffRoad movie :D (URL) (18 years ago, 30-Apr-07, to lugnet.robotics)
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| | Robo Quad - Stage Six
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Robo Quad - Stage Six - Work in progress - Head and neck construction. Vision Command Sensor Cameras. Custom eye lights and Ultrasonic sensor by Hitechnic. Neck up/down and Head left/right motion use RC Racer style motors. Ready for Stage Seven. (...) (18 years ago, 28-Apr-07, to lugnet.announce.moc, lugnet.build.mecha, lugnet.technic, lugnet.robotics, FTX) !!
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| | Control Lab - serial/USB
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The Lego Control Lab (peeron #9751) connects to a PC through a serial cable. Since most laptops don't have a serial port I was wondering if anyone knew how I might connect a Control Lab to a laptop. Would a USB converter work (will RoboLab recognise (...) (18 years ago, 28-Apr-07, to lugnet.robotics)
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| | NXTOffRoad+Extensionboard
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|
Hi, today I released the NXTOffRoad-Prototype... NXTOffRoad at Work (URL) Build-0 (URL) Build-1 (URL) with MCU (URL) for extensions (MCU-Board for SD-Card, Camera, Motors and additional IO-Ports) (URL) the pictures Bye Christian (18 years ago, 27-Apr-07, to lugnet.robotics)
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| |
| | NXT G-blocks list
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Please consult the excellent list of available NXT G-blocks (URL) Guy (18 years ago, 26-Apr-07, to lugnet.robotics)
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| | Re: Announcing LegWay, Finally
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(...) I have dowloaded and installed the code from Steve's website (URL) to test out the Legway. This download has a compiled version of the code, but not the actual code (.c file). My son was quite impressed with this balancing robot. The readme (...) (18 years ago, 26-Apr-07, to lugnet.robotics)
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| |
| | Re: Ultimate Builders CD-ROM
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(...) I know what you mean, but it's the same with the 'advanced' models in the RIS set. Those don't have step by step instructions though (like the Cybermaster for example). Are the ones on the Ultimate Builders CD step by step or do they show (...) (18 years ago, 24-Apr-07, to lugnet.robotics)
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| | Re: LEGO Engineer Software
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(...) I've been looking for that myself, but after a bit of search, I found this tutorial that shows that RoboLab has the ability to use the Control Lab 9751: (URL) this helps. John (18 years ago, 24-Apr-07, to lugnet.robotics)
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| | Re: Ultimate Builders CD-ROM
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(...) The model instructions on the CD are annoying to use since you have to build next to the computer and click to advance to the next step. I liked building the machine that can write pre-programmed messages, but it's rather flimsy and unreliable (...) (18 years ago, 23-Apr-07, to lugnet.robotics)
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| | Ultimate Builders CD-ROM
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|
I saw some screen shots of the Ultimate Builders set cdrom (peeron set number #3800, although the cdrom isn't referenced) I was wondering if anyone could tell me if the (7?) models detailed on that cdrom are any good, and if there's a way to get a (...) (18 years ago, 23-Apr-07, to lugnet.robotics)
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| | Re: Robo Quad - Stage Four and Five
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|
(...) For you, Stage Six - Head and neck construction (URL) Vision Command Sensor Camera - Custom Eye Lights and Ultra Sonic Sensor - by Hitechnic>> Eric Sophie (18 years ago, 21-Apr-07, to lugnet.robotics, lugnet.technic, FTX)
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| | Re: Zamor Spheres
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hmm, pity. Not that I'm likely to be able to participate in any big GBC (no such events where I live, in the north of Spain), but I gather that means they may not work in a ball pump e.g. linmix (...) (18 years ago, 21-Apr-07, to lugnet.robotics)
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| | Re: iCommand 0.5: Bluetooth API problem [Solved]
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Hi, Although I have not been able to work out the cause of the Bluetooth communication problem with the iCommand API mentioned in my last post, I have managed to code a 'bridge' DLL for my Java application to use the Lego's Fantom.DLL. The bridge (...) (18 years ago, 20-Apr-07, to lugnet.robotics)
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| | Re: Zamor Spheres
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No, they are larger and more heavy than soccer or basket balls. I have encountered problems when using them, in particular with modules of other people that relied on the smaller size. linmix schrieb: (...) (18 years ago, 20-Apr-07, to lugnet.robotics)
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| | Zamor Spheres
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I just saw Zamor Spheres are on offer at the Lego Store and I'd like to know if they'll work for GBC - are they the same sizwe as the soccer and basketballs? (those are hard to come by in any decent quantity) regards linmix (18 years ago, 20-Apr-07, to lugnet.robotics)
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| | Re: some new stuff on sale at U.S. online S@H
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(...) OK, so the Outdoor Challenger is significantly discounted - the real question is, has anybody found any way to mount those rather nice looking wheels (umm, rock crawling...) into a "normal" MOC? Anybody know how they connect? (18 years ago, 20-Apr-07, to lugnet.technic, lugnet.robotics)
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| | Re: Robo Quad - Stage Four and Five
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|
Hey there, nice work Eric. I can't wait to see this thing in action. I like to follow your BS folder for progress on it. Keep it up. Cheers, Nathan (18 years ago, 19-Apr-07, to lugnet.robotics, lugnet.technic, FTX)
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| | Re: Brickworld 2007 - Line Maze
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(...) Much clearer, thanks. The phrase "along the path" did not jump out at me the first time :-) Ralph (18 years ago, 19-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Re: Brickworld 2007 - Line Maze
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|
(...) Correct. (...) No, that was not the intent. That's why I said "every line segment and junction ALONG THE PATH from start to finish". Much of the maze will be line segments and junctions that are parts of dead-ends, not along the correct path. (...) (18 years ago, 19-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Re: Brickworld 2007 - Line Maze
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Brian Davis wrote: Great contest Brian - I have a question about this though: > In “solving” the maze, a robot must clearly traverse every (...) I think you mean the robot must only travel along the lines, it can't just drive across the squares. The (...) (18 years ago, 19-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Brickworld 2007 - Indy 5.00
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Brickworld 2007, June 21-24, Chicago Indy 5.00: Autonomous robots will run head-to-head races of five laps around a 8’x10’ oval gradient track. The event will be double-elimination or round-robin style (depending on the number of participants; (...) (18 years ago, 18-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Brickworld 2007 - Rock Crawling
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Brickworld 2007, June 21-24, Chicago Rock Crawling: The goal is to accumulate points by conquering as many obstacles as possible along a “Rock Crawling” course, with the spirit being to produce a remote controlled vehicle that can traverse a very (...) (18 years ago, 18-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Brickworld 2007 - Line Maze
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Brickworld 2007, June 21-24, Chicago Line Maze: Each robot gets three tries to find the end of a simple maze using line following techniques. The robot that completes the maze in the shortest time (after figuring bonuses and penalties) wins. Having (...) (18 years ago, 18-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Brickworld 2007 - Gladiator Sumo
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Brickworld 2007, June 21-24, Chicago Gladiator Sumo: The competition will involve two robots in a circular ring, with the goal being to push your opponent out of the ring or otherwise disabling them within the time limit. While pushing your opponent (...) (18 years ago, 18-Apr-07, to lugnet.events.brickworld, lugnet.robotics)
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| | Brickworld 2007 - Call for Mindstorms competitors
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As part of Brickworld 2007 in Chicago, Jun 21-24, we are going to try to run at least four seperate Mindstorms events: *The ever-popular Sumo (4' ring, 2 lb limit, flipping strongly encouraged) *Line maze (find your way to the exit, as fast as (...) (18 years ago, 18-Apr-07, to lugnet.events.brickworld, lugnet.announce, lugnet.general, lugnet.events, lugnet.robotics) !
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| | iCommand 0.5: Bluetooth API problem
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|
Hi, We are in the process of evaluating different NXT programming tools for our project and currently having some problems with the reliability of the the iCommand 0.5 Java library. We wrote a simple Java app that connects to the NXT and reads some (...) (18 years ago, 18-Apr-07, to lugnet.robotics)
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| |
| | Re: Brickfest2007 Crate/GB Contraption
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(...) I have added links to video files, as well as some commentary, to the write-up on the Crate Contraption shown at BrickFest. These video files all come from David Schilling, Thank you David. The write-up page has several embedded Brickshelf (...) (18 years ago, 18-Apr-07, to lugnet.org.us.smart, lugnet.robotics, lugnet.events.brickfest, FTX)
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| | Re: BrickFest™ 2007 Mindstorms Events Wrapup
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(Forgot to cross-post to robotics) It's been a couple weeks since BrickFest was over, but I wanted to thank everyone involved in the Mindstorms activities. I've only now had a chance to upload the many megabytes of videos that I wanted to have ready (...) (18 years ago, 17-Apr-07, to lugnet.robotics)
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| | Re: SRand - a random number generator NXT-G block with seed
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|
(...) What I'm really up to with NXT-G Simon is to actually connect the player to an input port on the NXT to measure their Galvanic Skin Response (GSR). That is the skin resistance from one finger to another using the NXT as an Ohmmeter. I want to (...) (18 years ago, 17-Apr-07, to lugnet.robotics)
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| | NXTiiMote
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|
(URL) NXTiiMote is a remote control device based on a MindSensors acceleration sensor. You may control a vehicle through Bluetooth by tilting the remote, forward/backward and left/right. Additionally, a wheel and push button can control (...) (18 years ago, 17-Apr-07, to lugnet.robotics, FTX)
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| |
| | Re: SRand - a random number generator NXT-G block with seed
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|
(...) Philo (18 years ago, 15-Apr-07, to lugnet.robotics)
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| | Robo Quad - Stage Four and Five
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|
(URL) Robo Quad - Stage One notes> (URL) Robo Quad - Stage Two and Three notes> Robo Quad - Stage Four and Five - Completed (URL) Robo Quad - Stage Six Work in Progress> (URL) Quad - Main Gallery> Robo Quad 2 RC Racer Units power the wheels and (...) (18 years ago, 14-Apr-07, to lugnet.announce.moc, lugnet.build.mecha, lugnet.robotics, lugnet.technic, FTX) !!
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| |
| | SRand - a random number generator NXT-G block with seed
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|
The NXT-G language lacks a random number block that allows you to initialize or seed the random number stream. This capability is very useful for producing random and yet repeatable behavior. SRand allows you to enter a seed value and set the (...) (18 years ago, 14-Apr-07, to lugnet.robotics)
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| |
| | RE: DataogValue and firmware > 0328?
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|
To get the latest RCX firmware. Download and install the free 30-day evaluation copy of RobotC (www.robotc.net). It contains RCX firmware version 7.xx. The firmware does not expire after the end of the evaluation period. Firmware version 7.xx is (...) (18 years ago, 10-Apr-07, to lugnet.robotics)
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| |
| | Brickfest2007 Crate/GB Contraption
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|
We had quite the Mindstorms/Technic display at BrickFest2007 in Portland last weekend! Now that I have been home for a week, I'm starting to recover enough to actually write something about the event. David Schilling was in charge of our (...) (18 years ago, 10-Apr-07, to lugnet.org.us.smart, lugnet.robotics, FTX)
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| | Re: DataogValue and firmware > 0328?
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|
Thanks! Haven't tested yet, but I have reloaded the bricks. I'm going to assume that it'll work with datalog r/w. I'm trying to improve my Laser Tag on a Brick ((URL) system with logging of who got you, and more. Chris (...) (18 years ago, 10-Apr-07, to lugnet.robotics)
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| | Re: DataogValue and firmware > 0328?
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|
(...) I have been using firm0332.lgo for some time taking advantage of the read/write ability of the datalog. Works very well. You can find it here: (URL) you are using a PC, right-click on lego/firm0332.lgo and Save Target As... to save the file to (...) (18 years ago, 10-Apr-07, to lugnet.robotics)
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| | DataogValue and firmware > 0328?
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|
Is there such a thing as a firmware greater than 0328 (firm0328.lgo) as supplied with RIS2? There must be because in the NQC manual there is a reference to \"the standard LEGO firmware version 3.30 which is available via the ROBOLAB software\". I do (...) (18 years ago, 10-Apr-07, to lugnet.robotics)
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| |
| | Another awesome video of a LEGO sumo robotic event
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|
Hello, At DivX we like to play with LEGO, we specifically like Autonomous LEGO Sumo Robot fights, few of us have put together a multi events championship and we are filming it in HD. We just published the round 3 of the championship, check it out it (...) (18 years ago, 9-Apr-07, to lugnet.robotics) !
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| |
| | Re: A Technic Train
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|
Nifty work there! It definetly looks fun, and makes me want to get some of those wheels. Without a differential, does it suffer on curves(1)? The only work around I can think of would be to only power one side of each axle, or put the gearing the (...) (18 years ago, 8-Apr-07, to lugnet.trains, lugnet.technic, lugnet.robotics, FTX)
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| | A Technic Train
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|
The new Lego remote-controlled (RC) trains use train wheels with Technic axle holes (only in the wheels connected to the motor, unfortunately). This creates an opportunity to power a train using essentially any Technic or Mindstorms motor, not just (...) (18 years ago, 8-Apr-07, to lugnet.trains, lugnet.technic, lugnet.robotics, FTX) !
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| |
| | NXTRC: Using Bluetooth with NXT under Linux.
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Hi, I wrote a program that allows to communicate with a NXT brick under Linux using a Bluetooth link. With this program you can upload and download programs run them and other stuff. You can find more info and get the source at (URL). Our site is (...) (18 years ago, 6-Apr-07, to lugnet.robotics.nxt, lugnet.robotics)
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| | Re: NXC/NBC release news
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|
Hi John, Thank you for your reply. I will try your suggestion and let you know how it goes. Regards, Davis (...) (18 years ago, 2-Apr-07, to lugnet.robotics)
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| | OK this is pretty cool
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(URL) LEGO, but maybe could provide inspiration for NXT builders... ROSCO (18 years ago, 2-Apr-07, to lugnet.robotics)
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| | Re: Infrared protocol of the RC trains?
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|
(...) Perhaps this one? (URL) folks, I saw NOTHING ELSE on the boards. And it is before midnight) Best Regards, Paul Sinasohn (18 years ago, 2-Apr-07, to lugnet.robotics)
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| | Re: I need help with a method in my class RADAR
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Hi Guys, At the end, I finished the class. I read some useful calculus from Krystian Majewski, (URL) source code is here: (URL) abrazo (18 years ago, 1-Apr-07, to lugnet.robotics)
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| | Re: I need help with a method in my class RADAR
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|
Currently, My methods runs, but the algorithm doesn run well; //Import NXJ Packages import java.util.*; import lejos.nxt.*; import javax.microedition.l....Graphics; /* NXT LCD Dimensions: Width: 100px; 0-99 -> 50 Height: 64px; 0-63 -> 32 */ public (...) (18 years ago, 1-Apr-07, to lugnet.robotics)
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| | I need help with a method in my class RADAR
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|
Hello guys, Yesterday, started to program with new NXJ realease. Currently I am developing a Radar Interface using Hitechnics Compass Sensor and Ultrasonic Sensor. I need your help with 2 methods: public static int getCoordenateX(int angle,int (...) (18 years ago, 1-Apr-07, to lugnet.robotics)
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| | Infrared protocol of the RC trains?
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Is there any information on the infrared protocol that is used by the RC Trains? (18 years ago, 1-Apr-07, to lugnet.robotics, lugnet.trains)
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| | Java for NXT
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The second alpha release of leJOS NXJ is now out - download from (URL) is now preliminary support for I2C (including the Ultrasonic sensor), Bluetooth, and Sound. Motor and navigation support is improved. This release still runs in RAM with the NXT (...) (18 years ago, 31-Mar-07, to lugnet.robotics)
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| | Re: NXC/NBC release news
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(...) The standard NXT firmware has a bug in the replace opcode which makes it impossible to use with multi-dimensional arrays (or ragged arrays of arrays). I have fixed this bug and submitted the code to folks at NI and LEGO for possible inclusion (...) (18 years ago, 30-Mar-07, to lugnet.robotics)
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| | Re: NXC/NBC release news
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Hi, Sorry for asking a naive question but I have been trying to create and manipulate an array of strings in NXC without much success. Here is the little test program that I use: #include "NXCDefs.h" task main() { string sarr[]; ArrayInit(sarr, (...) (18 years ago, 30-Mar-07, to lugnet.robotics)
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| | Re: LEGO Mindstorms NXT - Robotics based Electronics
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(...) Hi Don, Thank you for your contribution in this area! I am an Electrical Engineer by education, but I went down the Software Engineering path long ago. I tinkered a little with electronics when I was younger, did some TV repair work and (...) (18 years ago, 30-Mar-07, to lugnet.robotics)
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| | LEGO Mindstorms NXT - Robotics based Electronics
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As most of you know I've been exploring ways to revitalize electronics education via this blog and teachings at Lawrence Tech University and now ITT Technical Institute.What saddens me is the days of building electronic circuits on breadboards or (...) (18 years ago, 29-Mar-07, to lugnet.robotics)
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| | Re: Enhanced standard NXT firmware
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(...) That's great news, David. I'm glad that you are having success using the new CommExecuteFunction system call. I haven't had a chance to test it at all yet personally but I was very confident that it would just work seeing as how exposing it (...) (18 years ago, 28-Mar-07, to lugnet.robotics.nxt.nxthacking, lugnet.robotics, lugnet.robotics.nxt)
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| | Re: Enhanced standard NXT firmware
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"John Hansen" <afanofosc@comcast.net> wrote in message news:JF0sGr.M2w@lugnet.com... (...) implement (...) big snip Great job John. And thank you especially for CommExecuteFunction. I couldn't believe that Lego didn't allow a way to make a Bluetooth (...) (18 years ago, 28-Mar-07, to lugnet.robotics.nxt.nxthacking, lugnet.robotics, lugnet.robotics.nxt)
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| | Re: About velocity.
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(...) You can push the gearing still higher - 1:1 isn't the upper limit. But the trick with gearing is to match the gearing to the torque that the motor provides - and to use as few stages of gearing as possible. If 1:1 gearing is optimal - then (...) (18 years ago, 25-Mar-07, to lugnet.robotics)
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| | About velocity.
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First, I'm a beginner. So it will be very easy question for you guys. I have to make a lego robot with RCX model as fast as it possible. I just can use two motors and 4 wheels. It means I can use only a 'driving base'. I made gear ratio for 1:1, and (...) (18 years ago, 25-Mar-07, to lugnet.robotics)
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| | Re: Boosting power in a gear train / torque amplifier
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Alexander, Thanks for the differential/pole-reverser idea. Based on your description, I was able to get a prototype running very rapidly! I'm still seeking a clean more mechanical version, but this certainly will work for now. Along the lines of a (...) (18 years ago, 23-Mar-07, to lugnet.technic, lugnet.robotics)
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| | Robo Quad - Stage Two and Three
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(URL) Robo Quad - Stage One notes> Stage Two - Completed Stage Three - Completed Stage Four - Work in progress (URL) Robo Quad - Gallery> Stage One - Completed (URL) drive system>> (URL) front paw - top>> (URL) front paw - rear>> (URL) front paw - (...) (18 years ago, 22-Mar-07, to lugnet.announce, lugnet.robotics, lugnet.technic, lugnet.build.mecha, FTX)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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Do we loose points for melting the eggs? At any rate, it makes the foil stay on better. ;-) --Peter (18 years ago, 22-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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(...) Will, If you do manage to combine RCX & NXT, I expect it will look mashed-up, but unlike all the other stuff at BF, this is not a how-does-it-look competition. No matter how it looks, I'm sure people will cheer for robots that try to give them (...) (18 years ago, 21-Mar-07, to lugnet.events.brickfest, lugnet.robotics)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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(...) I'll give it a whirl! I wouldn't want you to get the NXT prize just because you were the only one entered. :) My 'bot may be a mashup of RCX & NXT. It will likely be horrible ugly, and exhibit questional operational effectiveness, but fame and (...) (18 years ago, 21-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: Boosting power in a gear train / torque amplifier
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I think one way to do this uses a differential (URL) and a pole reverser (URL). I don't have a picture to hand but the idea is simple. One side of the differential is connected to the low torque "input axle". The differential housing is connected to (...) (18 years ago, 21-Mar-07, to lugnet.technic, lugnet.robotics)
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| | Re: Boosting power in a gear train
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(...) A torque amplifier is EXACTLY what I need; thank you! Now I just need to figureout how to build one. Google has a few pix, two lego ones actually. I hope this will get me where I need to go! Thanks for the help, Rafe (18 years ago, 21-Mar-07, to lugnet.technic, lugnet.robotics)
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| | Re: Boosting power in a gear train
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(...) The original Mindstorms rotation sensor turns very easily - I think that three stud-balls of torque would be plenty to turn it. The more recent NXT stuff is another matter - I don't have a NXT system so I have no clue as to the problems of (...) (18 years ago, 21-Mar-07, to lugnet.robotics)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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(...) The walls are going to be about two inches tall. The houses will be considerably taller than that. Probably on the order of three to five times taller. By the way, there's only a bit over a week before BrickFest. If anyone else is considering (...) (18 years ago, 20-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: Boosting power in a gear train
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More information about your application would be helpful. The first thought that jumps to mind is "Use a more powerful motor. Duh!". So there must be something that I am missing. There must be some reason you need to use the puny motor. Maybe you (...) (18 years ago, 20-Mar-07, to lugnet.technic, lugnet.robotics)
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| | Re: BrickFest™ PDX 2007 - Robotic Easter Egg Hunt
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David, how high is the shortest house? Is it taller than the side panels? ---Will (18 years ago, 20-Mar-07, to lugnet.events.brickfest, lugnet.robotics, FTX)
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| | Re: Boosting power in a gear train
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(...) How much torque do I need to drive the rotation sensor? This was my first plan of action, but I was limited because I don't have a rotation sensor other than the NXT motors themselves! From a purist point of view, I would really like a (...) (18 years ago, 20-Mar-07, to lugnet.robotics)
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| | Re: Boosting power in a gear train
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(...) ... (...) So use a rotation sensor to sense the position of the weak input - and use a NXT motor to track that position and drive all of the gears. You can change the ratio of the input angle to the NXT motor's angle in software and thereby (...) (18 years ago, 20-Mar-07, to lugnet.robotics)
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