 | | Enhanced standard NXT firmware updates
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I have uploaded a pre-release of a new enhanced NBC/NXC firmware (1.06a) which you may want to try out. It has a new arrop opcode which supports a number of useful array operations. OPARR_SUM, OPARR_MEAN, OPARR_SUMSQR, OPARR_STD, OPARR_MIN, (...) (17 years ago, 11-Jan-08, to lugnet.robotics.nxt)
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| | Java for NXT
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The 0.5 beta release for Windows and for Linux is now on the sourceforge web site. (URL) changes and new features include: - Garbage collector - Execute code from flash - Automatic defrag of file system - Greatly improved Bluetooth support including (...) (17 years ago, 9-Jan-08, to lugnet.robotics.nxt)
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| | Re: Hi-speed port communication
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I posted a zip to the NXC samples page containing a pair of programs that show how to send a message from one NXT to another over a wire connected between port 4 on both NXTs. (URL) Hansen (17 years ago, 7-Jan-08, to lugnet.robotics.nxt)
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| | Re: Hi-speed port communication
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(...) Hi all, the physical connection of NXTs via RS485 is just the first half of the solution... Remeber, at 2-wire RS485 you can have one master only and up to 31 slaves. To address each slave, you need to implement a special protocol which (...) (17 years ago, 5-Jan-08, to lugnet.robotics.nxt)
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| | Re: Hi-speed port communication
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Hi Ross, (...) it should be possible to use RS-485 as a bus, i.e. connect several NXTs with one cable. You need to make the cable yourself, though, and you may need some termination on the ends. Jürgen (17 years ago, 4-Jan-08, to lugnet.robotics.nxt)
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| | Re: Hi-speed port communication
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(...) Thanks John. I agree that from the electrical point of view, just connecting one port 4 to another port 4 should just work with no hardware other than the cable (for short lengths, like the cables that come with the NXT). For longer cables, a (...) (17 years ago, 5-Jan-08, to lugnet.robotics.nxt)
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| | Re: Hi-speed port communication
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(...) Two. Input port #4 fills up pretty quick. Should give a nice performance boost over BT though. (17 years ago, 4-Jan-08, to lugnet.robotics.nxt)
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| | The Unofficial LEGO MINDSTORMS NXT Inventor's Guide
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I'm having a book signing this month for my new book The Unofficial LEGO MINDSTORMS NXT Inventor's Guide (No Starch Press), and I decided to officially announce the book here on LUGNET and invite everyone who lives in the Round Rock, Texas area to (...) (17 years ago, 4-Jan-08, to lugnet.announce, lugnet.robotics, lugnet.robotics.nxt, lugnet.events, lugnet.loc.us.tx, FTX) !
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| | Re: Hi-speed port communication
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(...) Cool! I wonder if you could daisy-chain NXTs using this technique, and if so, how many you could connect? ROSCO (17 years ago, 4-Jan-08, to lugnet.robotics.nxt)
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| | Hi-speed port communication
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I've been getting a number of emails from some people who want to know how to use the hi-speed RS-485 port 4 functionality in the NXT using the standard firmware. With John Barnes' help I now know how to get it to work correctly. Here is a simple (...) (17 years ago, 4-Jan-08, to lugnet.robotics.nxt)
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| | Re: designing new NXT parts (propeller and motor) using rapid prototyping
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(...) Indeed, this 180mA limitation is the one of the 4.3V power supply, that feeds the sensors and the motor position encoders. The motors themselves can receive a much higher current, limited by their own thermal protection and by the maximum (...) (17 years ago, 31-Dec-07, to lugnet.robotics.nxt)
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| | NXT iterate files
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I wrote some NXC code that runs on the enhanced NBC/NXC firmware. It demonstrates how to iterate files on the filesystem. Let me know if you have any questions. John Hansen #define LOADER_HANDLE(_x) (_x&0xff) #define LOADER_ERR_BYTE(_x) (...) (17 years ago, 30-Dec-07, to lugnet.robotics.nxt, lugnet.robotics)
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| | Re: NXC problem
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(...) Remove the #include "NXCDefs.h" line since recent versions of the compiler do not require that you explicitly include this file. Make sure you are running the latest BricxCC and NBC/NXC compiler. The lastest version of the compiler is (...) (17 years ago, 30-Dec-07, to lugnet.robotics.nxt)
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| | Re: designing new NXT parts (propeller and motor) using rapid prototyping
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(...) Nice looking parts! One of those times I wish I had a access to such equipment. (...) A nice idea, and well-written. There are a few interesting points that I thought of while reading through it. First, you mention the NXT limits the total (...) (17 years ago, 30-Dec-07, to lugnet.robotics.nxt)
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| | designing new NXT parts (propeller and motor) using rapid prototyping
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Dear all, For those interested, I have been exploring the use of rapid prototyping technology in building new parts for the NXT. I attempted to build a propeller brick in combination with a more powerful motor. Read my results on (...) (17 years ago, 30-Dec-07, to lugnet.robotics.nxt)
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| | NXC problem
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I've tried to install Bricx and NXC but when I try to compile a simple program I get an error like "Unable to find include file: "NXCDefs.h". I figure I probably just have something configured incorrectly but can't find any guidance as to what I (...) (17 years ago, 28-Dec-07, to lugnet.robotics.nxt)
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| | Re: recharging NXT battery block with DC adapter?
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(...) The reason asking is that sometimes we send teams of students to a country with different voltage in the outlet, i.e. 110V instead of 220V, and the LEGO adapter accepts 220V, but not 110V. However, we have a DC adapter that accepts both 110V (...) (17 years ago, 20-Dec-07, to lugnet.robotics.nxt)
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| | NXT, Bluetooth, and Palm
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Ok, so after 7 years of using my faithful Palm Vx, syncing it to my Kubuntu Linux machine at work put something on it to make it fatally crash every time I ran the calendar. Seeing as this was the most important function of the Palm, I decided it (...) (17 years ago, 18-Dec-07, to lugnet.robotics.nxt, lugnet.robotics.palm)
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| | Colour Sensor
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Which command do I use to initialise my Hitechnic colour sensor under NXC on the NXT? Thanks Steve (17 years ago, 18-Dec-07, to lugnet.robotics.nxt)
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| | Re: motor command question
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Hi Patty, I can't really answer this question other to say that I had exactly the same problem a while ago. I talked to LEGO tech support to no avail and they actually sent me a replacement block to fix the problem. However when I got it I had (...) (17 years ago, 3-Dec-07, to lugnet.robotics.nxt)
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