 | | Re: step-by-step tutorial leJOS and Eclipse
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Hey, Due to a complete redesign of the website, the tutorial URL was changed to: (URL) (16 years ago, 9-Mar-08, to lugnet.robotics.nxt)
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| | Re: Nxtcom error #89
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(...) Unfortunately, the standard firmware does not expose the ability to iterate through the files in the file system. You can do that with the enhanced NBC/NXC firmware, but even then the information you can get about a file is just its name and (...) (16 years ago, 7-Mar-08, to lugnet.robotics.nxt)
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| | Re: Nxtcom error #89
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(...) Thanks, John -- this agrees with what Dave found as well. Makes sense. (...) Thanks again. What would be really neat is a utility that can draw a memory map, showing what is stored where. I haven't seen such a thing since my Apple II days, but (...) (16 years ago, 6-Mar-08, to lugnet.robotics.nxt)
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| | Re: Nxtcom error #89
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(...) According to the LEGO Mindstorms NXT Communication protocol.pdf that is part of the Bluetooth Developer Kit, your error code (89) means "No linear space". That means all the remaining space on your NXT is fragmented so there is not enough (...) (16 years ago, 6-Mar-08, to lugnet.robotics.nxt)
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| | Re: Nxtcom error #89
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OK, for the archives: I got an answer from Dave Baum (author of nxtcom). He says that error #89 indicates memory fragmentation -- even though my NXT had plenty of free RAM in total, there was no single contiguous block big enough to hold the new (...) (16 years ago, 6-Mar-08, to lugnet.robotics.nxt)
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| | Re: Nxtcom error #89
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To follow up my own post: I've since verified that I have 45K free on the NXT, and the file I'm installing is under 13K. I've also restarted both my Mac and my NXT, and still get that mysterious error 89. After more experimentation, it does appear (...) (16 years ago, 5-Mar-08, to lugnet.robotics.nxt)
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| | Nxtcom error #89
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I've been using the nxtcom utility to download NXC apps from my Mac. It was working fine just a few minutes ago, but all of a sudden (starting about 10 minutes ago) it's giving me a "NXT Error #89". I've searched the web and read the read-me, and (...) (16 years ago, 5-Mar-08, to lugnet.robotics.nxt)
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| | Re: new to nbc; invaders problem
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(...) I will check into this when I get home this evening but I think your problem may be that BricxCC and NBC do not automatically download the .RIC files referenced in the program source code. Those must be downloaded manually, which you can (...) (16 years ago, 3-Mar-08, to lugnet.robotics.nxt, lugnet.robotics, FTX)
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| | new to nbc; invaders problem
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I'm just getting started with bricxcc (and winxp on my mac), so I'm hoping there's something painfully obvious I'm missing. I've compiled and run a few simple nbc and nxc programs (mostly from John's book), but invaders.nbc isn't working for me. I (...) (16 years ago, 2-Mar-08, to lugnet.robotics.nxt, lugnet.robotics, FTX)
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| | Re: Compass sensor with NXC
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(...) I emailed Karen with the solution to her problem. This can trip you up if you aren't careful. Drawing values to the screen can confuse you if you draw over the top of an existing number without clearing the screen first. John Hansen (16 years ago, 29-Feb-08, to lugnet.robotics.nxt)
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| | Re: Compass sensor with NXC
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(...) Hi John, We're using the HiTechnic sensor. I've contacted you directly with a copy of the program, and here it is if anyone else has an idea for us: task main() { SetSensorLowspeed(IN_2); int dir; ClearScreen (); TextOut (32, 48, "Heading:"); (...) (16 years ago, 28-Feb-08, to lugnet.robotics.nxt)
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| | Re: Compass sensor with NXC
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(...) Which compass sensor are you using, the HiTechnic one or the Mindsensors one? Are you using a low level API function to read its value or are you using one of the newer API functions specific to the compass sensor? Can you email me your (...) (16 years ago, 28-Feb-08, to lugnet.robotics.nxt)
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| | Compass sensor with NXC
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Hello, I coach a Robofest high school team, and we're using two NXT robots for the current challenge, programmed with NXC. We've been having a problem using the Compass sensor with NXC. If I use the view function on the brick (selecting Ultrsonic (...) (16 years ago, 28-Feb-08, to lugnet.robotics.nxt)
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| | Re: What should happen with the lugnet.robotics.nxt sidebar?
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(...) Yes. (...) Links to relevant forums, community projects, NXT MOCs, tips and tricks. (...) Yes, as a chronological, easy to view, list of recent newsgroup user NXT creations. (...) Cool NXT MOCs. (...) The "Recent Items of Interest" should (...) (16 years ago, 27-Feb-08, to lugnet.robotics.nxt)
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| | Re: What should happen with the lugnet.robotics.nxt sidebar?
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I do not use the sidebar at all. Zitat von Jordan Bradford <jordan_bradfordREMO...mail.com>: (...) ---...--- This message was sent using IMP, the Internet Messaging Program. (16 years ago, 26-Feb-08, to lugnet.robotics.nxt)
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| | Re: What should happen with the lugnet.robotics.nxt sidebar?
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(...) To be honest, no, as I read NXT news through lugnet.robotics and never go to lugnet.robotics.nxt... Philo (16 years ago, 25-Feb-08, to lugnet.robotics.nxt)
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| | What should happen with the lugnet.robotics.nxt sidebar?
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Hello, LUGNET readers. In case you don't know, I'm the lugnet.robotics.nxt curator. I used to update the NXT section sidebar with [in]frequent regularity, but during the last couple months I've not done anything to it. I get busy and/or don't take (...) (16 years ago, 21-Feb-08, to lugnet.robotics.nxt, lugnet.technic, lugnet.general, lugnet.admin.curators)
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| | Re: PF Speed control (and more) in NBC/NXC
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(...) OK THANK YOU (16 years ago, 20-Feb-08, to lugnet.robotics.nxt)
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| | Re: PF Speed control (and more) in NBC/NXC
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(...) I am in the middle of creating new API functions for NBC/NXC which will enable the same PF motor control via the mindsenors NRLink device. They should be done and in an official beta (b35) by the end of the week. John Hansen (16 years ago, 20-Feb-08, to lugnet.robotics.nxt)
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| | PF Speed control (and more) in NBC/NXC
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hello, I've read the news on nxtasy.org that the new test release of bricxCC can control the speed of PF motors via the Hitechnic IrLink.. is it possible to do the same thing with the mindsensors irlink ? thank you Cristian (16 years ago, 20-Feb-08, to lugnet.robotics.nxt)
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| | NXT on the Subway
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LOL, the School in Brooklyn where I teach Robotics, gave me an NXT Kit (consumer version) to create a robot for them to use at the Science Fair. [LEGOSet 8527] I did not have a bag to carry the box, so I carried it on the Subway. LOL, everyone was (...) (16 years ago, 14-Feb-08, to lugnet.robotics.nxt, lugnet.general, FTX)
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| | Re: nxt controller specification
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(...) Strangely enough, the AVR does NOT read motor encoders, the lines coming from the encoder directly enter the ARM processor... Philo (16 years ago, 14-Feb-08, to lugnet.robotics.nxt)
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| | Re: nxt controller specification
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(...) Yep. But note that Philo was talking about *torque*, not force. A torque of 50 N•cm means that it could supply a force of 50 N with a lever arm of 1 cm, or a force of 500 N (more than 100 lbs) for a lever arm of 1 mm... but that would imply an (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | RE: nxt controller specification
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Thank you for clarifying this, Brian. I was reading (URL) It stated that the NXT with "Stalled torque) up to 50 N.cm. 50N... it equates approximately 10lbs?! That is without any further gearing down, but just the NXT motors!? Wonder if anyone has (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | Re: nxt controller specification
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(...) Yes. The AVR is responsible for a number of things, including PWM and encoder reading on the motor ports (IMS), the reading of the front panel button state, power management, and A/D from the input lines for analog sensors. It is not (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | nxt controller specification
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Hi, I wonder if anyone may be familiar with the spec about the nxt brick: I found this on the ww.hobbyengineering.com . NXT Brick * 32-bit ARM7 microcontroller * 256 Kbytes FLASH, 64 Kbytes RAM * 8-bit AVR microcontroller * 4 Kbytes FLASH, 512 Byte (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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| | BricxCC Scripting
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BricxCC now has preliminary but fully functional support for compiling and executing PC-based scripts to control your programmable brick (NXT, RCX, Spybot, whatever). These scripts can be edited in BricxCC with syntax highlighting and (coming soon) (...) (16 years ago, 12-Feb-08, to lugnet.robotics, lugnet.robotics.nxt, lugnet.robotics.rcx)
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| | Researchers use Lego Mindstorms robot to improve ATM security
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(URL) the article: "When the researchers created their prototype, which is called Undercover and was built with a Lego Mindstorms robot, they attempted to come up with a system that would be easy to use but would limit vulnerability to common (...) (16 years ago, 8-Feb-08, to lugnet.robotics, lugnet.robotics.nxt, lugnet.mediawatch)
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| | NXT Battery not charging
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Has anyone had this issue before; I have a NXT with the rechargable battery pack and everything has been working fine. I've charged it twice with out issue, but then last night the NXT complained about a low battery but when I hooked it up to the (...) (16 years ago, 27-Jan-08, to lugnet.robotics.nxt)
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| | Re: NXT Power Programming > LDD files?
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(...) I don't know if the instructions are on-line (publishers don't always like that), but you might want to have them build something similar of their own, just to help in designing something. Remote controls tend to be pretty simple (although (...) (16 years ago, 27-Jan-08, to lugnet.robotics.nxt)
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| | NXT Power Programming > LDD files?
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Yesterday, I acquired and am sharing John's book "NXT Power Programming". I tried to read as much of it last night. Great book! Anyway, I'm at PSU conducting a Lego NXT class with 7 boys. Several of the kids are very interested in the Remote Control (...) (16 years ago, 26-Jan-08, to lugnet.robotics.nxt)
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| | Re: NXT apparently cannot detect two buttons pressed at once
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(...) Actually, I've found that the orange button cannot be used independently, at least not from an NXT-G program. A simple program in NXT-G demonstrates the buttons supercede each other as follows: Right button (lowest priority) Left button Off (...) (16 years ago, 21-Jan-08, to lugnet.robotics.nxt, FTX)
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| | Re: NXT apparently cannot detect two buttons pressed at once
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(...) Confirmed. The arrows and grey button share a common resistor ladder and only one can be detected. But the orange "on" button has an independant circuitry and can be used separately. See keypad schematics in the HDK. Philo (16 years ago, 21-Jan-08, to lugnet.robotics.nxt, FTX)
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| | NXT apparently cannot detect two buttons pressed at once
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Can someone confirm that the front panel buttons on the NXT are wired in such a way that it does not work to press two of them at once? Not too surprising, I suppose, just as early computer keyboards were pre-decoded to signal which single key was (...) (16 years ago, 21-Jan-08, to lugnet.robotics.nxt, FTX)
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| | pbLua News - Beta 13y is Released!
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I am pleased to announce the release of pbLua Beta 13y - which is a replacement firmware for the LEGO MINDSTORMS NXT that runs right on the brick. It parses source code files sent to it via the USB or Bluetooth ports and runs the code. (URL) Lua is (...) (16 years ago, 20-Jan-08, to lugnet.robotics.nxt)
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| | Re: LDraw NXT parts kit overhaul
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(...) Thanks, Philo! I really appreciate the hard work you (and others) have put into these parts. Your website makes it easy to add the NXT parts into MLCAD. (...) I'm glad to see that you've also addressed the "stone" colors issue on the website (...) (16 years ago, 18-Jan-08, to lugnet.cad, lugnet.robotics.nxt, FTX)
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| | Re: Self-brew flexible bricks and silent motor for Lego NXT
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(...) There's a simple solution to the problem you've been having with air bubbles. Once you've got the mold filled, you need to introduce vacuum, which will pull the bubbles right out of the material and dissipate them. Back when I was in the (...) (16 years ago, 13-Jan-08, to lugnet.robotics.nxt)
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| | Re: LDraw NXT parts kit overhaul
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(...) This is great! Thanks much Philo! Now, if only someone can convince Kevin to make LSYNTH work with the wider cables of NXT. (16 years ago, 18-Jan-08, to lugnet.cad, lugnet.robotics.nxt, FTX)
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| | LDraw NXT parts kit overhaul
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After several weeks of patient work, I am finally finished with a major redesign of all NXT parts. All these parts were submitted to (URL) LDraw Parts Tracker> but for your convenience I have updated the (URL) kit> available on my website. Using (...) (16 years ago, 18-Jan-08, to lugnet.announce, lugnet.cad, lugnet.robotics.nxt, FTX) !!
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| | Re: Self-brew flexible bricks and silent motor for Lego NXT
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Sibrecht, that's awesome! I've blogged an according entry to THE NXT STEP blog: (URL) moulding one's own custom parts - a dream ... Best, MP Zitat von Sibrecht Bouwstra <s.bouwstra@student.tue.nl>: (...) ---...--- This message was sent using IMP, (...) (16 years ago, 16-Jan-08, to lugnet.robotics.nxt)
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