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Hi, has anybody tried a setup like this: - The tower sends a message to the RCX. - The RCX beeps. - The beep sound is captured by two microphones on two neighbouring corners of the navigation space. - Their signal is fed into a stereo soundcard. - (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | mindstorms/robolab in uk schools
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hi - (especially if there are any uk teachers susbrcibed to this group....) i was wondering if anyone had any idea of what sort of penetration lego has achieved into schools with its rcx bricks via mindstorms/robolab kits, and the extent to (...) (25 years ago, 29-Nov-00, to lugnet.robotics)
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| | Re: 2 motors, different speeds
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I have a whole article on this very subject: (...) (25 years ago, 29-Nov-00, to lugnet.robotics)
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| | RE: Hi there
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Depending on your lego skills, it would be better to follow a few simpler designs at first, building the bot is only about half the battle the other half is getting the code to make it do what you want. You need experience with sensors, motors, how (...) (25 years ago, 29-Nov-00, to lugnet.robotics)
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| | RE: Mindstorms book
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I bought the O’reilly book and it has a lot of helpful information in it, especially about sensors, he likes forth as a language ( I gave up on that one about 15 years ago, because of lack of documentation) but does do quite a little with NQC, I (...) (25 years ago, 29-Nov-00, to lugnet.robotics)
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| | Re: 2 motors, different speeds
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You can put rotation sensors on each wheel, and then monitor them for changes. If one gets ahead of another, then slow that motor down. This works well, but differences in the wheels cause it to turn slightly. Andy (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Ball-less mice (was :Re: FW: Another DIY sensor)
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(...) I can confirm this, at least for the US market; I just bought the Logitech optical wheel mouse, and it was $30 at Fry's in Campbell, California. (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Lego Mindstorms Europe Demo Tour
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Hi all, (...) no problem with that. BUT ! We took part at the Lego VisionCommand 2000 Competition in Germany. We build an synchrodrive without lego turntables. The Lego chief engineer (don't remember the name, Steven ?????) toke a look at it an was (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Lego Mindstorms Europe Demo Tour
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(...) I suspect the custom pieces that make their way into sets began life as a modification of an existing part. After all, I doubt they wanted to make a custom mold until they were certain it did what they wanted it to. John A. Tamplin (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Lego Mindstorms Europe Demo Tour
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Andy Lynch wrote: >There were also some other bricks modified to press into the touch sensors >on the blue robot. There may have been more, but I stopped looking at that >point. > >Don't get me wrong, the robots were *still* impressive, but I was (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: 2 motors, different speeds
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(...) Yes I think you're expecting too much. :) Two "identical" motors will go at a *similar* speed if set to the same power level, but chances of them going at the *same* speed is highly unlikely. Bryan (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Mindstorms book
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(...) Of course there are in internet, but what if you don't have it ? Think about 12+ years old kids !?! Rainer (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | 2 motors, different speeds
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I have two motors set to the same power levels, but one is always going slightly faster than the other. I've tried it at different power levels but still the same result. Am I expecting too much for them to go at the exact same speeds? Or am I (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Ball-less mice (was :Re: FW: Another DIY sensor)
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The optical mice that do not require a special tablet to operate all use the same sensor, made by Agilent (formaly HP). It is the HDNS2000. The spec can be found here: (URL) this thing has 2 types of output: - PS/2 (connects directly to a PC) (used (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: R2-D2 with RXC
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Hi ! I did it ! It was very difficult 'cos info from the Lego WebSite are poor. By inspecting picture on many angles, I understood some tips. So, If you're in trouble, I shall send you from pics from my digital camera. My robot is not perfect but (...) (25 years ago, 25-Nov-00, to lugnet.robotics)
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| | RE: Which Palm?
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Time for me to stop lurking. I've written a few Palm applications, and have an RCX, and indeed I was the person who both deciphered the IR protocol that the Furby uses to talk to other toys, and built a laser-emitting LEGO brick: (URL) would love to (...) (25 years ago, 22-Nov-00, to lugnet.robotics)
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| | Mindstorms book
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Hi, I bought Dave Baum's on an impuls and now regret it. I don't know about the o'Reilly book, but this one is especially weak on models. Main reason to buy it would be to learn NQC, but there are more sources for that... Duq (25 years ago, 22-Nov-00, to lugnet.robotics)
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| | Hi there
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Hi... I'm about to start work on a biped. So any you veterans have any advice i should abide by ? I definitely need it Waqas (25 years ago, 22-Nov-00, to lugnet.robotics)
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| | A better sound sensor
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Techno-stuff is pleased to announce their new musical pitch sensor. This Lego-compatible sensor returns a value based on the frequency or pitch of the sound it hears. The sensor has been optomized for use with a flute or recorder, and also responds (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Firmware file version?
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I don't know what version 0325 is, but as far as I know, only two versions of the firmware have shipped with Lego sets so far. Both the 1.0 and 1.5 RIS sets, plus all add-on sets (RoboSports, Extreme Creatures, Mars) ship with the original firmware. (...) (25 years ago, 27-Nov-00, to lugnet.robotics)
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