 | | NXT Power Programming
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I’d like to officially announce that Variant Press will soon publish my new book, NXT Power Programming. It should be available November 7th. You can pre-order it now at Amazon.com or Variant Press. I hope everyone who purchases a copy of NXT Power (...) (18 years ago, 11-Oct-07, to lugnet.announce, lugnet.robotics, lugnet.robotics.nxt) !
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| | Re: Mindstorms NXT 1.1
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(...) Thanks Matthias, I did read that discussion; but I hadn't realized the people who said they called actually received it for free. My understanding was that they were in countries were it's listed as "not available yet" (such as Germany or (...) (18 years ago, 10-Oct-07, to lugnet.robotics.nxt)
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| | Re: Mindstorms NXT 1.1
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Thanks Philo, I should have thought to check nxtasy on the subject. Looks like there are a lot of improvements; but then again what interests me most is full support of my computer, which the current software doesn't provide. A patch, in short. On (...) (18 years ago, 10-Oct-07, to lugnet.robotics.nxt)
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| | Re: Mindstorms NXT 1.1
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There has been an according post on THE NXT STEP one week ago ((URL) a lot of comments of users there state that they have received it free of charge. I also do not understand why it is not available in Germany - that's ludicrous for an (...) (18 years ago, 10-Oct-07, to lugnet.robotics.nxt)
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| | Re: Power Functions presentation
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(...) I did it, I'll try to update my page with some internal photos. (...) The battery box delivers power through power lines (used by IR receiver) if the switch is not in neutral position, and C1 C2 whose polarity depends on switch position (and (...) (18 years ago, 10-Oct-07, to lugnet.robotics.nxt, lugnet.technic)
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| | Re: Mindstorms NXT 1.1
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(...) You are not alone thinking that: (URL) there are indeed a lot of improvements: (URL) (18 years ago, 10-Oct-07, to lugnet.robotics.nxt, FTX)
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| | Re: Power Functions presentation
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"Philippe Hurbain" <philohome@free.fr> wrote in message news:JpHqA1.FM@lugnet.com... (...) built internally? Your page seemed to suggest that someone had actually taken them apart, but there was no more information on there. Apart from the obvious (...) (18 years ago, 10-Oct-07, to lugnet.robotics.nxt, lugnet.technic)
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| | Mindstorms NXT 1.1
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Hi, I don't think I've seen it here yet, but apparently LEGO is finally releasing version 1.1 of the NXT software. It will be available on Shop@Home: (URL) So far it seems it's not available in all countries yet, but a phone call might work. To me (...) (18 years ago, 9-Oct-07, to lugnet.robotics.nxt, FTX)
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| | robo soccer
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I wonder if there is anyone who has experience with the following book: RoboCup 2002: Robot Soccer World Cup VI (Lecture Notes in Computer Science) I have a group of students are working on robosoccer game using nxt with RobotC. Recommendation? (18 years ago, 9-Oct-07, to lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) You are right, the main limitation probably comes from wall wart... You are essentially right for the 0.7A current (though it is not hard limit, rather a safety one). Philo (18 years ago, 9-Oct-07, to lugnet.lego, lugnet.robotics.nxt, lugnet.trains)
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| | Re: ARM Assembly Language Programming on NXT?
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(...) Thanks for the tip. I glanced at (URL) previously but I must've missed it thinking it's Java based. (...) Are you referring to the default NXT firmware or the LEJOS NXJ/OSEK firmware? (...) You're right, I've come across several ARM-based SBC (...) (18 years ago, 9-Oct-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: ARM Assembly Language Programming on NXT?
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(...) Thanks Dick for intruducing LEJOS OSEK, When we develolped LEJOS OSEK, Prof. Mizuno wrote several GCC assembly code to port TOPPERS OSEK (an open source OSEK OS) to NXT. Whole assembly code(*.S) is stored in lejos_osek\toppers_o...1sam7s-gnu (...) (18 years ago, 9-Oct-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: The Future of Trains
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(...) The Australian LEGO wall wart is marked 10V @ 7VA on the secondary. I don't recall all the stuff I learnt about the relationship between VA and W, but that seems to me to indicate about 0.7A. I believe this generally reduces as load increases, (...) (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt, lugnet.trains)
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| | Re: The Future of Trains
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(...) At BayLTC we usually run four train motors on one loop using stock Controller with a 1.2 amp wall wart. Bruce (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt, lugnet.trains)
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| | Re: The Future of Trains
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(...) The linear regulator inside is a 1.5A version if I remember well, but I may be wrong. Cross posted to lugnet.trains trying to get train guru opinion... Philo (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt, lugnet.trains)
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| | RE: ARM Assembly Language Programming on NXT?
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Do a Google on "LEJOS OSEK". I believe this is a solution that has taken the base "OS" from the NXJ JAVA byte code interpreter as the basis for programming the NXT using GCC C++. I assume if you can use the GCC C/C++ tools with the NXT then you (...) (18 years ago, 8-Oct-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: The Future of Trains
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(...) Philo kindly corrected me, pointing out that the NXT outputs are regulated down to 1 A, so you couldn't run a dual-truck train all the way to stall. You could still get a good bit of the way there, however. Does anyone know what the peak (...) (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) Ah, thank you - so running two stalled train motors would exceed the NXT output, but running one train motor up to a stall conditions should be fine. Out of curiosity, along with the output limitations on the NXT (1 A) and RCX (500 mA), does (...) (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) Some precisions here: - NXT stall current is 2A but only for a short time: internal thermal protection will trip at a current much lower than that (exact value depends on temperature and overload duration). A practical value is about 1A - NXT (...) (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | ARM Assembly Language Programming on NXT?
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Hi, I just stumbled on this newsgroup/website while searching for kits for teaching Assembly Language programming to undergraduate students in Comp. Science in an interesting (interactive) manner. I'm primarily interested in the ARM instruction set. (...) (18 years ago, 8-Oct-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: The Future of Trains
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(...) So it sounds like a single loop should be no problem under most situations, since I'm not sure I've heard of anyone running three motors on a single train (there's the same issue with how much amperage a power regulator can push). (...) It (...) (18 years ago, 8-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) Stalled, the train motor pulls 950 mA, while the stall current of the NXT motor is a whopping 2 Amps. So a single NXT motor output should easily handle a twin-engine train loaded to the point where it stalls the engine(s)... there's the matter (...) (18 years ago, 7-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) Fair enough, but clearly the idea has sparked some interest, so I'm sure I'll see it get put into use at some point. (...) The ports may be able to pour out power, as you say, but I'd say it's equally well established that large trains with (...) (18 years ago, 7-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) As Ross mentioned, I was focused more on the "future" of trains, and if it's going to be done in LEGO, it looks like it will be done without conductive track. (...) Absolutely, but you could do better. Run a single loop off a single output, (...) (18 years ago, 6-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Power Functions presentation
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I have updated my website with a presentation of the new Power Functions system, including: # Overview of Power Functions range # Description of working # Comparison with older 9V mini-motors # LDraw and LeoCAD part files (URL) motors comparison (...) (18 years ago, 6-Oct-07, to lugnet.announce, lugnet.technic, lugnet.robotics, lugnet.trains) !!
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| | Re: The Future of Trains
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(...) I believe the options being discussed were in relation to the use of non-metal track, which is all that will be produced by LEGO in the foreseeable future. ROSCO (18 years ago, 6-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) Oh, for shame, Brian. Letting me think up an option that you passed right over (and a really cool one at that). With the legacy converter cables, you could power the _track_ with an NXT. Hook the track up as if it was a motor, using the (...) (18 years ago, 6-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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(...) Not exactly, that I know of, *yet*... The biggest problem in running a train would be hiding the NXT - I saw only one good solution to hiding the RCX in a boxcar, and the NXT is bigger, as are the motors. You could use an old motor (or even a (...) (18 years ago, 6-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: The Future of Trains
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In lugnet.lego, Scott Wardlaw wrote: <snip> (...) <snip> Has anyone adapted two NXT units to drive a train yet? One NXT as a controller talks bluetooth to the other NXT that drives the train. The NXT that drives the train could be either attached to (...) (18 years ago, 5-Oct-07, to lugnet.lego, lugnet.robotics.nxt)
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| | Re: Wonderful design tidbits PDF - anybody else impressed?
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(...) Don't let Brian's and Philo's understatements lead you to believe that this book, a collection of hundreds of ultra-high quality photos arranged in a stunningly simple succession of nearly uniform page layouts, is anything but the finest (...) (18 years ago, 5-Oct-07, to lugnet.technic, lugnet.robotics)
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| | Re: Wonderful design tidbits PDF - anybody else impressed?
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(...) I am impressed. This "book" is simply delightful. Many useful tips, wonderful presentation... Highly recommanded! Philo (18 years ago, 5-Oct-07, to lugnet.technic, lugnet.robotics)
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| | RoboFest Hawaii
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The Second Annual RoboFest Hawaii robotics competition and engineering fair will be held on Saturday, November 17 from 10:00 am to 2:00 pm at the University of Hawaii at Hilo Gym. RoboFest Hawaii is a high-technology and engineering fair thinly (...) (18 years ago, 2-Oct-07, to lugnet.robotics)
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| | Re: Cirque des Sciences
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(...) (18 years ago, 29-Sep-07, to lugnet.robotics)
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| | STriDER 2.0 -- tripedal robot
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This robot walks on three legs, but not in the way you'd expect: (URL) (18 years ago, 25-Sep-07, to lugnet.robotics, lugnet.technic)
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| | eZCIRCUITS #2 Is Available
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Hi All, I've just posted another eZCIRCUITS to my blog (URL). This application will show how to build a Bumper Sensor-Switch with the help of the LEGO NXT for mobile robots and mechatronics platforms. Enjoy!!! Don W. (18 years ago, 22-Sep-07, to lugnet.robotics.nxt)
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| | Re: New pbLua Beta13o - Now with FLASH Writing!
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(...) Hi Ralph, WOW, great work!!! It works perfectly... Some additional notes and documentation about storing Lua programs at flash memory is available at: (URL) for your excellent support Christian (18 years ago, 20-Sep-07, to lugnet.robotics.nxt)
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| | Cirque des Sciences
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For those who want to meet our robot team, sharing older and more recent robot creations "life", you are invited to the Luxembourg "Cirque des Sciences" ((URL) that will happen this weekend. There will be GASTON, Erik's xy-plotter, (...) (18 years ago, 20-Sep-07, to lugnet.robotics)
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| | Re: Any Good Fan Instructions Using Only One NXT Set?
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(...) Thanks Matthias. That's just the kind of thread I was looking for. -Paul (18 years ago, 20-Sep-07, to lugnet.robotics.nxt)
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| | Re: Any Good Fan Instructions Using Only One NXT Set?
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(...) Yes, this helps a lot. I'll definitely check out your book when it comes out. Thanks! -Paul (18 years ago, 20-Sep-07, to lugnet.robotics.nxt)
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| | Re: NXT's in Series
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(...) Yes this works fine, just using a normal sensorcable ! Another simple out of the box solution is: first Master NXT connects to other remote pbLUa consoles by bluetooth.... The master can send Lua commands directly to remote NXT and is able to (...) (18 years ago, 19-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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(...) Here's one way: Use NXC or NBC. Pair a secondary NXT to a the primary NXT on connection 1 using the menu system on the primary NXT. Control the outputs on the secondary NXT using RemoteSetOutputState in a program running on the primary NXT. (...) (18 years ago, 19-Sep-07, to lugnet.technic, lugnet.robotics.nxt)
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| | Re: Serenity, an autonomous NXT-based boat
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The City Harbor boat hull is plenty big to hold an RCX or an NXT. It could hold three of them end to end, actually. There are studs on the bottom of the hold and along the top, so you could build a cage for an NXT or just stick the RCX directly onto (...) (18 years ago, 19-Sep-07, to lugnet.robotics, FTX)
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| | Re: Any Good Fan Instructions Using Only One NXT Set?
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Paul, have a look here: (URL) Matthias Zitat von "Paul S. D'Urbano" <durbano@optonline.net>: (...) ---...--- This message was sent using IMP, the Internet Messaging Program. (18 years ago, 19-Sep-07, to lugnet.robotics.nxt)
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| | Re: Any Good Fan Instructions Using Only One NXT Set?
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(...) Hi Paul, This website has some free building instructions for robots that can be built from the pieces in one NXT set: (URL) new book has some building instructions for robots that can also be built from the pieces in one NXT set: (URL) my new (...) (18 years ago, 19-Sep-07, to lugnet.robotics.nxt)
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| | RE: step-by-step tutorial leJOS and Eclipse
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(...) I tried it and it was painless. I made a typo in entering the "Path" field which took a while to figure out; otherwise it worked like a charm. Overall score: very good / satisfied. Please don't take the following as criticism -- you asked for (...) (18 years ago, 19-Sep-07, to lugnet.robotics.nxt)
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| | Any Good Fan Instructions Using Only One NXT Set?
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Any good books or fansites out there with instructions for neat stuff you can make with just the parts in one Mindstorms NXT set? Thanks! (18 years ago, 19-Sep-07, to lugnet.robotics.nxt)
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| | Re: Power-Functions extension wires
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(...) I've been wondering this myself. I thought it would be soon seeing as the bulldozer came out ahead of schedule, but now it looks like the cables wont be here before october. (18 years ago, 18-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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(...) pbLua supports communication over the RS485(?) port. That's sensor port 4. Using that port, you can connect several NXTs together. You just need a cable that connects to several ports. Steve (18 years ago, 18-Sep-07, to lugnet.robotics)
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| | Re: step-by-step tutorial leJOS and Eclipse
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Christoph, That's great! I've posted an according entry to THE NXT STEP blog: (URL) Matthias Zitat von Christoph Bartneck <christoph@bartneck.de>: (...) ---...--- This message was sent using IMP, the Internet Messaging Program. (18 years ago, 18-Sep-07, to lugnet.robotics.nxt)
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| | step-by-step tutorial leJOS and Eclipse
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Hello, We created step-by-step instructions on how to install and run Java on your LEGO Mindstorms NXT using leJOS and Eclipse: (URL) hope that his is helpful to you and maybe you can even report back possible improvements. Enjoy, Christoph (18 years ago, 18-Sep-07, to lugnet.robotics.nxt)
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| | Re: NXT's in Series
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I suspect that with the proper software (and maybe a special cable), the I2C protocol can be used to network between NXT controllers. I2C is a multi master bus with collision detection, so it "should" work. It's just a SMOP [Small Matter of (...) (18 years ago, 18-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) It's a good thought - in fact, my first attempt was to use the front treaded "flippers" on LNE/Packbot so that Packbot could drive onto a "floatation frame", and either power or deploy its own "water tread" propulsion. That idea fell afoul of (...) (18 years ago, 17-Sep-07, to lugnet.robotics)
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| | Re: NXT's in Series
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[Cross-posted to lugnet.robotics as it's on-topic there] (...) There's no absolutely transparent way to make a program running on one NXT address the sensor or motor ports of a 2nd (or 3rd, or 4th) NXT. However, a lot of solutions to this problem (...) (18 years ago, 17-Sep-07, to lugnet.technic, lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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Not that I've tried it (of course) but it seems that if were to use the treads with small paddles attached, it would push the splashing part to the rear, give skid steering, and sill provide good propulsion, similar to the corkscrew idea. Chain (...) (18 years ago, 17-Sep-07, to lugnet.robotics)
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| | Re: First Impressions: LDD 2.0 and building with Technic elements from NXT.
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(...) Granted, meshing gears is awful. You have to place the gears on axles with space between them, rotate one with hinge tool until they could match, then move the rotated gear and axle in meshing position. And trying to modify a gear ration in an (...) (18 years ago, 16-Sep-07, to lugnet.cad.ldd, lugnet.robotics.nxt)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Oars are nothing but highly asymmetric paddle wheels. Yes, I know, that's a bit simplified, but still splashes a lot unless you have the high amount of control over force curves, blade angle, etc. that an experienced rower has. Just check out (...) (18 years ago, 15-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Oars! (18 years ago, 15-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) never had (...) gears (...) turned (...) A Thai style Long-tailed-boat may be easier to build and would keep the motor out of the water. No rudder - just rotate the engine. Peter (18 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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Zitat von Brian Davis <brdavis@iusb.edu>: (...) Sails. The motors used to trim them according to the direction and strength of the wind. ---...--- This message was sent using IMP, the Internet Messaging Program. (18 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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OK - Since you beat me to that one how about magnetohydrodynamic propulsion (thought that might be hard with stock Lego :) Or more realistically, how about counter-rotating screw drives, like this one: (URL) be able to make something like it by (...) (18 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Airboat? Though I don't know if you could drive a large enough prop fast enough to move you... -Rob A> (18 years ago, 14-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Good idea, and I should have added that to the list. But a high-thrust LEGO air propeller or fan seems to be even tougher to make than a water propeller. There's been a lot of discussion in the past about LEGO hovercraft, but it's rather hard (...) (18 years ago, 14-Sep-07, to lugnet.robotics)
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| | RE: Serenity, an autonomous NXT-based boat
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(...) I consider the ZNAP flex axles "not good enough" to be put to good use. Another useful item from the ZNAP collection, however, are the wheels. They have a turbine-like shape and from what I remember from past testing in the kitchen sink, they (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Airboat! (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Those are a good all-LEGO solution... but they tend to splash. A lot. This isn't fatal, but means either "splash shielding" the electronics (which requires more weight), or making the entire robot bigger (so the splashing wheels aren't close (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) I'd love to see more people try this. It's a little bit risky (usually, when my programming skills fail the robot doesn't end up stranding in the middle of a lake... or worse, on the bottom), but it brings up a whole new range of problems and (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) If you're talking about the Outdoor Challenger (8675) ( (URL) ) then, yes, he has one of those... Steve (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) You know, what I like most with your project is that is such a refreshing, new challenge, which - as you pointed out- surprisingly few people though of yet. So, this might become a completely exciting NXT robot section. I think it was in 2005 (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) What about paddle wheels? Tim (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Actually, I haven't thought of that - at least partially because I've never had those axles. But I would think that a vertical axle driving meshed crown gears to drive the horizontal propellor axle, or even an inclined axle that is turned (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Brian, Have you considered using some of those ZNAP flex axles and a LEGO propellor? Ralph (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) I never seriously considered LEGO robotic boats... until I was walking through the LEGO asile one day, while thinking about the Hitechnic compass sensor, and my eyes glanced off the words "ship floats" on the LEGO box. Put those two together, (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Thank you very much! (...) Actually, there still seem to be relatively few robotic water-craft around, to my surprise. That is an excellent project, and I'd not seen it. I'm also really glad I did not have to go the same route as he did (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Brian, ... absolutely cool ! I would like to attract your attention to a rather old Italian site (1999). (URL) Riccardo built a marveleous non-LEGO robot-boat equipped with electronic compass and GPS and travelling over the "Idroscalo Lake" (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: New pbLua Beta13o - Now with FLASH Writing!
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(...) Normally we should start our 2007/2008 robot projects this Fall. PbLua definitely is on the list of being tested. (18 years ago, 13-Sep-07, to lugnet.robotics.nxt)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Wow Brian, that looks cool. I never thought of making a NXT boat. If I did I would probably not let go anywhere much other than a bath tub, it's pretty brave to take it out somewhere. I'd be worried about recovering the craft if the batteries (...) (18 years ago, 13-Sep-07, to lugnet.robotics)
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| | Re: Serenity, an autonomous NXT-based boat
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(...) Nicely done! Next I wanna see an autonomous NXT controlled sail boat ;) Actually, the name would probably suit a sail boat more... (...) Nope can't waste time on that when you have a sail-boat to build! ROSCO (18 years ago, 12-Sep-07, to lugnet.robotics)
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| | Re: New pbLua Beta13o - Now with FLASH Writing!
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(...) Claude, thanks for the encouragement. I remember exchanging notes with you on pbForth, and I'll bet your students are as bright as ever. If you have a spare NXT and a motivated student it would be really interesting to see what they think :-) (...) (18 years ago, 12-Sep-07, to lugnet.robotics.nxt)
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| | Re: New pbLua Beta13o - Now with FLASH Writing!
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(...) Way cool ! Exciting ! (18 years ago, 12-Sep-07, to lugnet.robotics.nxt)
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| | Serenity, an autonomous NXT-based boat
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Well, I blogged about it, and wanted to make sure I shared it with the folks that inspired me (LUGNET). I've never been really interested in LEGO boats, because in the first place I couldn't see much use for them (guiding a robot over featureless (...) (18 years ago, 12-Sep-07, to lugnet.robotics) !
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| | New pbLua Beta13o - Now with FLASH Writing!
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All of you that have been helping to test pbLua.... I have released another Beta of pbLua - and it's got FLASH writing (and reading) goodness in it. (URL) It does not yet have the ability to boot from a string in FLASH but it's very close. The (...) (18 years ago, 12-Sep-07, to lugnet.robotics.nxt)
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| | Re: Ultrasonic Sensor iS "Slow"
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(...) The 15 ms that John reported is the time it takes for a sound pulse to travel 500 mm, the round trip distance at the maximum advertised range of the US sensor. An interesting coincidence? Roger Glassey (18 years ago, 11-Sep-07, to lugnet.robotics.nxt)
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| | Power-Functions extension wires
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The Lego web site contains the following information: Can I use Power Functions elements with my old 9V elements? Yes, with the Power functions extension wire (available Sept 1, 2007 through www.LEGOShop.com) you can use most of the 9V elements (...) (18 years ago, 10-Sep-07, to lugnet.robotics)
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| | Ultrasonic Sensor iS "Slow"
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Original Thread title was "Re: Ooops! NXT Software Comparison correction / I2C Messaging Speed". I've renamed as worth a separate thread. (...) You're right!! If you poll the sensor too fast, it definitely reports wrong distances. I'm doing some (...) (18 years ago, 7-Sep-07, to lugnet.robotics.nxt)
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| | RE: NXT-G/ROBOTC Firmware Scheduler and Clump Priority
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Holy cow! This is fun to read... I wish I have the time to further discuss this regarding the events handling with nxt. Follow up later. Thanks for such detailed info. --Elizabeth -----Original Message----- From: news-gateway@lugnet.com (...) (18 years ago, 7-Sep-07, to lugnet.robotics.nxt)
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| | Re: the LEGO CNC-Machine
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(...) i will drive the spindle motor using a 9v adaptor, like the ones i use for my rcx and scout ( (URL) ), so i won't run out of juice. (18 years ago, 6-Sep-07, to lugnet.robotics.rcx)
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| | Re: the LEGO CNC-Machine
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"daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnww91.2oG@lugnet.com... (...) What will drive those big motors? (18 years ago, 6-Sep-07, to lugnet.robotics.rcx)
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| | RE: Ooops! NXT Software Comparison correction / I2C Messaging Speed
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(...) I want to list both. First, the one-to-one mapping, and second (with some explanation) the code with a second task. Several other pieces of software have an "optimized" version of code, and it makes sense to do the same for NBC. Steve (18 years ago, 6-Sep-07, to lugnet.robotics.nxt)
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| | Re: the LEGO CNC-Machine
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I>> (...) i have the design in my head, i just need three power motors and another rcx :) (18 years ago, 5-Sep-07, to lugnet.robotics.rcx)
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| | Re: NXT-G/ROBOTC Firmware Scheduler and Clump Priority
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Wow! Very interesting posting. Thanks for revealing that, Dick! Zitat von Dick Swan <dickswan@sbcglobal.net>: (...) ---...--- This message was sent using IMP, the Internet Messaging Program. (18 years ago, 6-Sep-07, to lugnet.robotics.nxt)
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| | NXT-G/ROBOTC Firmware Scheduler and Clump Priority
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In a typical operating system (OS), tasks are scheduled on a priority basis. The highest priority task always executes ahead of lower priority tasks. If there are multiple tasks at the highest priority, then they are typically executed in a round (...) (18 years ago, 6-Sep-07, to lugnet.robotics.nxt)
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| | RE: Ooops! NXT Software Comparison correction
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(...) After tuning, NBC achieved 73K test cycles. It achieved these great results by setting the task "priority" to 200. Unfortunately, unless the NXT-G task scheduler has been rewritten, these results might be a little too high. A NXT-G task (or (...) (18 years ago, 6-Sep-07, to lugnet.robotics.nxt)
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| | RE: Ooops! NXT Software Comparison correction / I2C Messaging Speed
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(...) Nobody cheated or is dishonest. Everyone who writes firmware for the NXT is well-intentioned "good" people. Let's not mislabel good modern programming practice -- i.e. hardware device drivers integrated into the low-level firmware -- as (...) (18 years ago, 6-Sep-07, to lugnet.robotics.nxt)
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| | Re: Ooops! NXT Software Comparison correction / I2C Messaging Speed
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(...) I think I understand. In this case, the limiting factor is the US sensor itself, how fast it can ing and interprete a return. Or from my standpoint (a physicist), it's a fundemental limitation of the physics of sound, not a limitation that has (...) (18 years ago, 5-Sep-07, to lugnet.robotics.nxt)
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| | Re: US-Sensor I2C-address
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(...) To my knowledge the LEGO Ultrasonic sensor does not support changing its I2C address. IIRC it is hard-coded to 0x02. I do not think it is ADPA-compliant. John Hansen (18 years ago, 5-Sep-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: Ooops! NXT Software Comparison correction / I2C Messaging Speed
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(...) The errors that occur are that the sensor does not properly report variable distances as it is positioned at varying distances from an obstacle. If you slow down the read rate then it works correctly (i.e., with a wait of ~15 ms between read (...) (18 years ago, 5-Sep-07, to lugnet.robotics.nxt)
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| | Re: the LEGO CNC-Machine
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"Bob Fay" <rgfay@earthlink.net> wrote in message news:Jnv1B9.4zC@lugnet.com... (...) Daniel, I posted one of my unknown machines to youtube. This one would not cut any material. The movie is very bad as I did not have a digital camera at that time. (...) (18 years ago, 5-Sep-07, to lugnet.robotics.rcx)
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| | Re: pbLua GUI ???
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(...) I forgot the screenshot ;-) (URL) me: which of the connected NXTs is real ? One of this NXTs is software only (pbLuaAPI). Bye Christian (18 years ago, 5-Sep-07, to lugnet.robotics.nxt)
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| | Re: pbLua GUI ???
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(...) New Eclipse version EUROPA (3.3) with LuaEclipse, RSE Target Management, RXTX and pbLuaAPI works excellent with pbLua ! You have direct access to all serial connected NXTs (Bluetooth and USB) from the Eclipse Workbench. A perfect professional (...) (18 years ago, 5-Sep-07, to lugnet.robotics.nxt)
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| | Re: Ooops! NXT Software Comparison correction / I2C Messaging Speed
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Hi Dick, (...) actually I2C runs at something close to 12kHz in the LEGO firmware (I forgot the exact value). Jürgen (18 years ago, 5-Sep-07, to lugnet.robotics.nxt)
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