 | | 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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