 | | Cleaning Battery Terminals
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I haven't posted here in a while, my RCXs having been on a hiatus. Well, after breaking them out again, I discovered that I had foolishly left alkaline batteries in some of them and of course some of the batteries had started to leak. This caused (...) (17 years ago, 9-Jan-08, to lugnet.robotics)
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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: 8479 Code Pilot Barcode Analysis and Code Sheet
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(...) Alex Christensen posted a PDF file with these same bar codes back in February of 2007: (URL) based his work on Doug Eaton's extremely helpful VLL page: (URL) Hansen (17 years ago, 7-Jan-08, to lugnet.robotics.codepilot, lugnet.technic)
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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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| | 8479 Code Pilot Barcode Analysis and Code Sheet
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Dr. Soubhi Sabbagh contacted me recently to get information on Code Pilot, and collecting various sources he was able to analyse and create a PDF code sheet. " So, I decided to study the bar code algorithm and I co-operated with www.dlsoft.com until (...) (17 years ago, 5-Jan-08, to lugnet.robotics.codepilot, lugnet.technic)
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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: NXT Program: How to avoid stop-and-go? (US-Sensor Test Values)
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I tried to use a program to log the distance while the US-sensor is moving forward. Unfortunately, it doesn't go straight all the time. So, I simply display the US value and put the vehicle in different position manually. Here are my test values for (...) (17 years ago, 27-Dec-07, to lugnet.robotics)
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| | Individual Power-Functions elements now available
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Individual Power-Functions elements now available on H@H: battery box, both motor types, IR receiver and transmitter, and a Power-Function to 9V converter cable. Listed as shipping later in January. (17 years ago, 26-Dec-07, to lugnet.technic, lugnet.robotics)
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