 | | Re: motorized points - beating a dead horse
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You could try my switch - (URL) out for Lego and Models ... I build this thing using a rubber-band so you can let it run without the switch destroying itself. Just let the motor run a view seconds until the point switches it's position. Michael (...) (25 years ago, 1-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: motorized points - beating a dead horse
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There's a lot of activity around Lego trains. Clubs, fans, shows, web sites, and lots more. If you look around, you should find some suggestions. Try this page for starters: (URL) a page with some information on point motors: (URL) (25 years ago, 1-Dec-00, to lugnet.robotics)
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| | Re: motorized points - beating a dead horse
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(...) (note some heavyhanded snippage) Well, it wouldn't be entirely elegant unless you mounted the mechanics under your substrate, but if you were to gear down the movement so that the white clutch gear had to exert less torque to overcome the (...) (25 years ago, 1-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: motorized points - beating a dead horse
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Steve, If you are willing to use non-lego parts, there is a reliable solution. You can build a limit switch that does not use any sensor inputs. You need two "normally closed" switches, and two diodes. Solder a diode across each switch. Wire the (...) (25 years ago, 1-Dec-00, to lugnet.robotics)
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| | Re: motorized points - beating a dead horse
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Try putting belt drive stage in your geartrain so it can't destroy things and use touch switches to limit the travel... (25 years ago, 1-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: motorized points - beating a dead horse
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I didn't take pictures, but I did it w/ some gearing and clever placement of a touch-sensor. The key part was that the touch sensor (though light or rotation would work) would sense when the switch was vertical; I then used the motor like a big (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | motorized points - beating a dead horse
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Hi All, Currently I am attempting to build an automated hump yard. The main problem I'm tackling is the RCX controlled motorized points. I've spent 7 hours over the last two days trying to build a motorized switch track that will run forever with (...) (25 years ago, 30-Nov-00, to lugnet.trains, lugnet.robotics)
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| | Cellular Automata
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Hi, Two new pages have been added to my website describing Cellular Automata, and how this can be used as a simple robot brain. Bert Artificial intelligence and machine learning www.bvandam.net (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: RIS 1.5 kit
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You can get it cheaper in the UK. PC World are selling RIS1.5 for £109.99 - i bought three sets!! k "Craig Martin" <lego-robotics@crynwr.com> wrote in message news:191100324.41999...box.com... (...) (25 years ago, 28-Nov-00, to lugnet.robotics)
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| | Re: Recipricating motion problems
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This is a little short of 90 degrees. (URL) Fay rfay@we.mediaone.net The Shop (URL) Stern" <2busytobe@home.com> wrote in message news:3A2687F4.B93568...ome.com... (...) gear, i (...) but i (...) the (...) you (...) the (...) sure (...) supposed (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: AW: Navigation by sound?
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Hi :) I was going to write about the need for the minimum of 3 point for a perfect TRIangulation etc.. but then, it just ocurred to me: One can use this err... "BIangulation" (eheh) technic (in theory... I just thought of this right now)) to direct (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: Recipricating motion problems
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sorry but you lost me, whats a cam? If you mean an off center 40 tooth gear, i already tried that but it didn't work. i could get it to turn th other , but i could get it to turn it back again Jason (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: Recipricating motion problems
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You need gears or a cam that allows an adjustment in the distance from the centerline of the shaft. A 24 tooth gear and a 40 tooth gear would allow you to accomplish such action. I find the cam is very useful as the driven element. You can always (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | RE: Ball-less mice (was :Re: FW: Another DIY sensor)
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Chris wrote: >The Lego rotation sensor supplies four different voltage values as it >rotates so that you can tell in which direction it is rotating. I thought >the ball-mice use disks with an optical sensor that senses lines on >the disk. Using the (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | AW: Navigation by sound?
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Hi, just passing by coming from sci.geo.satellite-nav it occured to me that even under best circumstances and assuming the robot to be on a plane area two microphones will not provide the position, or better said, it still might be on either one or (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Real Basic or applescript tools.
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Hello, I have a project were I want to send messages to my RCXs' I would like to use applescript or real basic as I want to be able to have the RCX to be controllable from other non Lego related apps. I did some digging and there is an Applescript (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: Ball-less mice (was :Re: FW: Another DIY sensor)
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Oh. I sort of figured that you took the stuff out of the mouse (i just went back and read all the messages ;), it just that I have an optical mouse and i wouldn't want to take it apart. if the rcx could read the outputs from the mouse directly, then (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: Ball-less mice (was :Re: FW: Another DIY sensor)
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Jason wrote: >Doing a little research, I found out that, when >used with ps/2, mice are supplied 5 volts dc and have two data outputs, for a total >of 4 wires. I'm not sure how much power the rcx supplies, but optical mice should >be able to work (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Re: Ball-less mice (was :Re: FW: Another DIY sensor)
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I just got a usb or ps/2 optical mouse (with a wheel!) for $20 at compusa. I'm not sure who is trying to get an optical mouse to work with the Rcx, but i'd like any information on it that they have. Doing a little research, I found out that, when (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Recipricating motion problems
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I have two 24 tooth gears. The lower gear is one hole down, six holes over from the upper gear. Like so (the @ are where the center of the gears are): @ @***** ^1 2^ I need to make it so that by turning gear 1 continusaly, in only one direction, (...) (25 years ago, 30-Nov-00, to lugnet.robotics)
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| | Navigation by sound?
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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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