 | | RE: Stepper Motors
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(URL) the interactive c page .-----Original Message----- .From: T.C. [mailto:dab8rs_85@yahoo.com] .Sent: Monday, October 11, 1999 3:49 PM .To: handyboard@media.mit.edu .Subject: Stepper Motors . . .Can anyone give me a sample program on how to (...) (26 years ago, 12-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Mindstorms/reinforcement learning
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(...) My prompt and humble apologies for forgetting Forth, yet again :) That would also give you the necessary capabilities, though Ralph would have to speak to it's speed when doing (literally) tens of thousands of mathematical operations. -Luis (...) (26 years ago, 12-Oct-99, to lugnet.robotics)
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| | LegOS
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Has anyone thought of building a true OS (or replacement firmware) based on LegOS? As I understand it, LegOS isn't actually an OS at all, but rather is a source code library. I guess that's the benefit of pbForth which is actually a true firmware (...) (26 years ago, 12-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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Shaun Sullivan wrote in message <38038A63.5E1C@mit.edu>... (...) Consider that it has about 4 times the screen time that the Sith Infiltrator has though... (...) in some set that doesn't (...) Boba Fett has about the same screen time his ship does (...) (26 years ago, 12-Oct-99, to lugnet.robotics, lugnet.starwars, lugnet.technic)
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| | Re: LegOS
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It'd be interesting, but you'd have to describe some kind of scripting language for the new OS to interpret, or a binary format that you could then convince gcc to compile to.Either way, you're talking a lot of work. It would be an interesting task, (...) (26 years ago, 12-Oct-99, to lugnet.robotics)
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| | Turning send.c into a dll
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Hi, Has anyone been able to compile send.c into a .dll file under Cygwin? Can you provide instructions on how to do that? Thanks Andy (26 years ago, 13-Oct-99, to lugnet.robotics.rcx.nqc)
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| | RE: Mindstorms/reinforcement learning
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(...) Ha, and it wasn't even me that reminded you this time... Seriously, I am exchanging emails with someone who is doing an AI project using pbFORTH. He claims the thinking time is a bit slow, but I don't know enough about the project to make a (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Error at address 0x0000
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Hi, That error message is actually to do with a fault in the Borland Delphi code for serial transfer, NOT a fault with the HandyBoard! (I use the same Delphi code in my HandyBoard terminal program as the program HBDL). It appears to manily occur on (...) (26 years ago, 13-Oct-99, to lugnet.robotics.handyboard)
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| | RE: Mindstorms/reinforcement learning
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Please let the rest of us know as well, Ralph- I'm very interested in any type of AI stuff on the Mindstorms. As a "quick" note, our projects (using something called Q learning if anyone out there knows the terminology) involve doing roughly (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Lego Bots in Germany???
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(...) So they don't - the way they treat the english language indicated that they not push it early in schools, or did not do that until fairly recently. (...) High-School in Denmark is actually called Gymnasium, but that would without explanation (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: LEGO Reverse DNS?
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(...) Our web server recorded 80 hits from inside lego.com during Sep/Oct/Nov of last year. All hits were from a single machine. My top-level page was hit 10 times. I suspect all of these hits were from a single person. -Kekoa (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | (canceled)
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| | Motor Controller Question
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From what I could figure out from the literature on the HB, the motor controller circuit is controlled by Port B on the 6811. With a little tinkerin last nite I was trying to set/reset some of the pins poking values into $1004 (Got this from "An (...) (26 years ago, 13-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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My guess is that there´ll be a Slave I because: - it´s got a good size to be build as a modell (well a smaller scaled version) - we need more of the bad guys. One TIE is not enough for playing Star Wars - it looks cool, so it´ll sell good - we´ve (...) (26 years ago, 13-Oct-99, to lugnet.robotics, lugnet.starwars, lugnet.technic)
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| | RE: Mindstorms/reinforcement learning
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(...) Declaring variables (almost any number of them) in pbFORTH is like this: VARIABLE FOO Fetching and storing is like this: 23 FOO ! ( this stores the value ) FOO @ ( this fetches the value ) Values are 16 bit integers - 32 bit doubles use a (...) (26 years ago, 13-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Forth vs Assembler
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Since observing these Lego email broadcasts, I've been wondering what Forth was. Engineering background, not CS! Now I know, after reading Ralph Hempel's "RE: Mindstorms/reinforcement learning". Very cryptic by the looks! Why not use honest to (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | RE: Forth vs Assembler
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(...) There are a couple of reasons to choose pbFORTH over raw assembler... 1. Assembler requires an assembler, which means downloading and configuring the GNU tools on eiher Linux or Cygwin for Win9x. Not for the faint of heart. 2. Once you get (...) (26 years ago, 13-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Fire Extinguishers
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CAn anyone of YOu tell me how can I make a fire extinguisher robot by standard Lego Mindstorms system that has only 2 touch and 1 light sensor.Plz reply me back on my email rather as a post to the group.I prefer it that way Thank YOu all Imad Khan (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Fire Extinguishers
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(...) Why does this sound suspiciously like a class assignment? BTW, we got your mail the first time, I guess nobody decided it deserved a response. AlanC (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Fire Extinguishers
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I can offer some suggestions. Part of the fun of Lego MindStorms is figuring things out on one's own ... but a few hints probably won't hurt. Because the light sensor is particularly sensitive to infrared (IR), you should be able to use it to locate (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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(...) Han wasn't wearing his vest when he was frozen in carbonite. . . my feeling is that there will be a slave I, and the promo catalog picture that we see of Han Solo is the minifig that will come with the Slave I and somehow have a carbonite (...) (26 years ago, 13-Oct-99, to lugnet.robotics, lugnet.starwars, lugnet.technic)
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| | Re: Motor Controller Question
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bruce, for the HB you need to write data to $7000 to control the motors. see appendix B of the 6.270 manual at (URL) also the HB FAQ (URL) your message you said: (...) (26 years ago, 13-Oct-99, to lugnet.robotics.handyboard)
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| | PWM on tic3
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Hi, I want to get the width of a PWM on TIC3 Channel, I wrote an .asm but it doesn't work, I don't know what's wrong? I need your help. Thanks in advance. Said. Here is the .asm program: #include "c:\pcode\include\6811regs.asm" * program equates * (...) (26 years ago, 13-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Forth vs Assembler
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(...) It's especially easy to program in assembly for whatever CPU architecture you happen to be familiar with. If you've got a background in Motorola parts, that makes them easy for you. I grew up on Z80 and ARM, so it's different for me. BTW, the (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | FW: Mindstorms/reinforcement learning
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-----Original Message----- From: Ralph Hempel [mailto:rhempel@bmts.com] Sent: Wednesday, October 13, 1999 11:59 AM To: Blake Winton Subject: RE: Mindstorms/reinforcement learning (...) Yes!!! The simple FORTH tutorial is good. Thanks for the link. (...) (26 years ago, 13-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Does anyone here live in Hagerstown?
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Does anyone here with Mindstorms live in Hagerstown, MD? Josh (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | RE: Fire Extinguishers
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I guess it wouldn't be sporting or cost effective to simply put a large water balloon on top of the robot, look for the strongest IR source with the light sensor, drive till you hit it, and wait......;>) Jeff jeffrey.hazen@northmill.net (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Flex Cables (was: Does anyone has the 8479 bar code truck?
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Dave Baum <dbaum@spambgoneenteract.com> wrote in message news:dbaum-111099212...act.com... (...) The "type I" connectors were pulled from the market in the US. There was in fact some legal issue -- something about a choking risk. I forgot where I (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | Re: Fire Extinguishers
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I have managed to multiplex motor output before. How about building a single motor powered tricycle device with the second motor steering the front wheel. Then use the front wheel at right-angles position, detected by a touch sensor, to change gears (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | c++
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I am coding a program that communicates with the RCX, and everything seems to be working. However, I have come across one problem. I have a set of buttons that control the movement of the motors. What I am trying to do is smooth out the movement. (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | HandyBoard and Mini SSC-II
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HiHi, I am a final year student in HongKong, I'm now trying to build a 6-legged robot, with 2 servos per leg. I would like to use the Handyboard interfacing with 2 Mini SSC-II servo controller, but since I am a new player in robotics, I do not know (...) (26 years ago, 13-Oct-99, to lugnet.robotics.handyboard)
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| | BrainStorm version 1.0 available
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BrainStorm version 1.0 released. Brainstorm is a version of the LOGO programming language with added commands and functionality to control Lego MindStorms spirit.ocx. The new commands can be used to write Programs for download as well as giving (...) (26 years ago, 13-Oct-99, to lugnet.robotics.rcx)
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| | RE: HI
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Hi there, Hello there. My name is Alvin. I m currently a student at university of Hertfordshire at UK. I m doing my final year in Electrical n Electronic Engineering. Well actually i m doing an individual project concerning the Lego Mindstorms.vi (...) (26 years ago, 13-Oct-99, to lugnet.robotics)
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| | interfacing the GP2D12
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Somebody asked the other day about a problem interfacing the Sharp GP2D12. I didn't see an answer, and I just did it myself and solved the problem, so here is how to do it. For those who don't know, Sharp just came out with an IR ranging sensor good (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: LEGO Reverse DNS?
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(...) This might help -- I've been doing some research into TLG's networks (hoping to find a publicly accessible content staging server -- a suprising # of web development shops run these) -- here's some info that I've found (all from easily (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Upgading HB to 64K
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Please follow the link bellow if you are interested in upgrading memory on your HandyBoard to 64KB. Note that this upgrade is currently being tested only on HB running the Java VM. (URL) Gasparik (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | RDS Q:
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Please see: (URL) does it mean: "For this function, you will need to program the RCX to send an IR Message (1 through 12) using RCX Code. The Scout will respond to the IR Messages while it is running any program on the display" ? I mean, the Scout (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | More Motor Controller Question
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Thanks Fred. That got me going in the right direction. But...... When I poke a value into $7000 I can see the corresponding input pin on the l293 react. But it will not stay in the position that I set it to. It will return back to the initial state (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: HI
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(...) This is a good starting point that should keep you busy for a while: (URL) know you did not ask about programming environment, but make sure you checkout Mark Overmars' RCXCC at: (URL) fun! Keep us informed of your adventures. hwiguna (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: wireless camera
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Just a note. The German Marklin model train company offers a wireless camera built-in in a 'tiny' H0-scale train car. It's expensive but it prooves the technology is available at a consumer scale. Eric (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | RE: RDS Q:
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The scout has some pre-programmed routines that are activated by receiving a message from the RCX or the IR tower. I listed them in a post to this group, I think the thread was something like "RCX VS the Scout". What I found was that the scout will (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: RDS Q:
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Found. Thanks. Carlo Jeffrey Hazen <jeffrey.hazen@northmill.net> wrote in message news:01BF1619.77F6CE...thmill1... (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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(...) Absolutely not. There is no way that this list is accurate. From what I hear, Lego is not doing any more Episode 1 sets at all. So you can cross off the AAT, MTT and the Two Kaadus right away. Also, multiple mindstorm sets? No possible way. To (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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(...) Well, there's the Mindstorms RIS + 2 expansions, + Cybermaster + Droid Developer Kit + Robotics Discovery Set. (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | RE: LEGO Reverse DNS?
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(...) Ahhh. Last year...is this when you were starting to publish the internals - I think so. At that point I think they might have been casting around looking to see if anyone was actually hacking the RCX. Once they found out what was going on, (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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(...) Right, these are the two official expansions for Lego Mindstorms with the Mars Expedition on the way. That makes 3 total in 2 years. + Cybermaster This is a stand alone system, not Mindstorms. The rumored sets clearly say, "Mindstorm (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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Another day, a different rumor ... www.theForce.net has this poll up: "What vehicle would you most like to see be made into a Lego set? (Not Mindstorms or Technic, remember Falcon, Slave-I, Skiff, A-Wing, AAT, MTT, and B-Wing are coming)." Ah, the (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Rotaion Sensor Sampling Speed?
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Hi all, I'm putting together a mazebot for Mindfest, and ran into a bit of a funny with the rotation sensor. I THINK it has to do with the sample speed, but I'm not positive. I'm using pbFORTH and sampling the rotation sensor in a tight loop. The (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | RE: pbForth
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(...) I think there are some C to FORTH translators at www.forth.org, but the problem is you need to configure them to run on your CPU and then to output FORTH compatible with your target. Not an easy task. Why not just learn FORTH? I learned about (...) (26 years ago, 14-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | Re: Rotaion Sensor Sampling Speed?
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Ralph, I don't know about the specific issues with pbForth, but this summer I was working on a large gear train (for a problem that we have recently "proven" is computationally intractable for the RCX) and dropped about 20 counts out of every 1,000 (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | RE: Rotaion Sensor Sampling Speed?
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(...) Well, I'd need to vibrate things while looking at raw values, which is possible, I guess. I could run the gantry, smaple as long as possible and then store the value in an array... Something like: CREATE BUFFER 5000 CELLS ALLOT ( makes room (...) (26 years ago, 14-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: Rotaion Sensor Sampling Speed?
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(...) I thought the problem was that it vibrated itself? (...) <snip forth code, which looks cool :)> (...) Take a look at the code that Markus sent out a while ago with the new firmdl he cooked up, particularly the code in keepalive.c and the code (...) (26 years ago, 14-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Re: HI
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Alvin Yap <lego-robotics@crynwr.com> wrote in message news:19991013204452....ail.com... (...) I have a few pages of sensor information: (URL) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: c++
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(...) It depends... One solution is to let the motor float. Another and (I think) obvious solution is to gradually decrease the motor speed by calling SetMotorSpeed (or whatever you call that function) repeatedly with a decreasing speed value. Søren (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: Upcoming _Star Wars_ Mindstorms and Technics Releases
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(...) Sure. But the person who got the leaked info might not know that. Early rumors for the R2D2 set called it a Mindstorms R2D2. Same thing, yeah? I'm not saying the rumor is accurate, just that where it says "Mindstorms", it might be fair to read (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | NEW POWER SUPPLY
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I NEED TO KNOW THE EXACT STEPS TO CONNECT A NEW MOTOR POWER SUPPLY TO THE HANDYBOARD WHILE IS HAS THE EXTENSION BOARD CONNECTED TO IT. IT'S TO MY UNDERSTANDING THAT THE EXTENSION BOARD SHARES THE SAME SLOT AS THE NEW MOTOR POWER SUPPLY, IS THE ANY (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: NEW POWER SUPPLY
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This was explained a week or two ago here on the list server. Check back and you'll find out what traces to cut, etc. However, I have found another way that is very simple, and does not require you to make difficult-to-fix cuts on your boards. Just (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: NEW POWER SUPPLY
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Great solution Gary! How about just pulling the L293D/SN754410 from the U11 socket, bending pin-8 out and soldering the REALLY BIG battery positive lead to it, then soldering the negative lead to pin-1 without bending it out, and then reinstalling (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: NEW POWER SUPPLY
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That is the same thing, except much easier. Plus we save donut money. However, we'd have to look at the effect of 7 volts reverse bias on the motor LED's. Plus, we'd have to make real sure not to short the bent pin 8 to the socket underneath it. (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: !!! Laser attachments for Mindstorms !!!
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(...) That sounds like what you would get if you gave two tin cans and a piece of string to the Defense Department and asked them to develop a field radio. - Robert Munafo (URL) LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13 (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: NEW POWER SUPPLY
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What about this idea? Cut the motor trace as per on Fred's website....than desolder the motor power header (the one that plug into the Handy board) on the expansion board and flip the header upward and resolder it to the expansion board. Then reuse (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Re: RDS Q:
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(...) Here is the message to which Jeffrey is referring: (URL) here is the actual information (imagine that!) 0...stop momentarily 1...spin 450d ccw, back to 0d, resume path 2...spin, resume at about 30d ccw of original path 3...crazy dance, resume (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | Re: NEW POWER SUPPLY
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I think you win the prize for the best solution Giang! - Nick - (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | Start_process problem
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Hi When I try to start a process , the code downloads fine , it runs on the board with no errors but it only excutes the first proceess once and none of the others. void main() { start_process(fwrd()); start_process(checkir()); (...) (26 years ago, 15-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Flex Cables (Does anyone have the 8485 CCII)
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|
Thanks to Kevin the 8485 Control Center II scans are available and I can finally build the T-Rex. I assumed no-one would want to part with these cables, so I found a way to make my own length of flex cables with 0.065 string trimmer line, making the (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: You call it risk, I call it threat, Let's call the whole thing off Dept. (was: Re: [Rumour] FBI and Mindstorms)
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(...) i wonder if these highly paid paranoids ever heard of ... encryption? like, just encrypt stuff whenever it leaves a computer? duh. nik ___...___ nikolaus heger nik@stagecast.com PGP fingerprint: 650.354.0735 970A 0D39 41BD A660 AACB 674B 747A (...) (26 years ago, 14-Oct-99, to lugnet.robotics)
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| | questions about legOS??
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I got the latest version of legOS, and now I am lost. What else do I need to start programming? I know that the files I have aren't a program, but you download them to your RCX with your RCX program instead. Can anyone help me out? thanx (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Data acquisition through analog input
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-- MIME ATTACHMENTS DISCARDED: 1. Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: base64 Content-Length: 297 2. Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: base64 Content-Length: 1408 (26 years ago, 15-Oct-99, to lugnet.robotics.handyboard)
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| | Re: questions about legOS??
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Thoroughly read the HOWTO at arthurdent.dorm.duke...HOWTO.html and then come back :) More seriously, you still need a lot- a compiler and a working knowledge of C, to start with. Details on the compiler are in the HOWTO, but if you don't know C, (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | RE: c++
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That would not make the motion any smoother. Granted (yes it is obvious) that it would make the shuting down of the motors smoother it still does not have the desired effect. The solution I believe is somehow coding it so that as long as the button (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | re: start_process problem
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My suggestion is to double check that you double check the simple things withing the code (your code should be executing an infinite loop) while(1) { code .... } If the code is more complex and involves external assembly modules, check that they (...) (26 years ago, 15-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Start_process problem
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alex, each of your processes must be an indefinite loop. otherwise starting them up via start_process just runs through once. so, e.g.: void checkir() { while (1) { if (digital(4)) { /* go backward for some time */ /* turn a little */ /* go forward (...) (26 years ago, 15-Oct-99, to lugnet.robotics.handyboard)
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| | stuff
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Hi everybody... I was wondering if anybody has investigated attaching more powerful motors to the RCX. Can anybody tell me (before I bother finding out myself) how to rig up a more powerful motor by getting the RCX output to control some sort of (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Mindstorms on Macs! MacDaily plans review(?)
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Hi Folks, I was browsing Mac Gamers hoping to find info on the new mactell voodoo3 cards and instead discovered this... (URL) appears the next week ( Tuesday) they plan on covering Mindstorms on Macs troubleshooting. I thought someone here might (...) (26 years ago, 15-Oct-99, to lugnet.robotics.events)
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| | Powered Crossaxles Through a Large Technic Turntable
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In tinkering with my new robot thingy, I've come up with a design someone might find useful. I realize that it may be a bit on the obvious side to many of you advanced LEGO roboticists; however, I've seen a few people requesting more basic (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | RE: Powered Crossaxles Through a Large Technic Turntable
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(...) (URL) is cool. I just wanted to mention that MLCad is a really decent program. I hope Michael will develop it further for the Mac, but then again, have a look at Dave baum's site for info on his graphics for his new book: (URL) One tip, you (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Flex Cables (Does anyone have the 8485 CCII)
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Can someone post a side by side comparison of Type I and II connectors?? I have the 5118, 8485, 8412, 8437, and they all have the same connector ends. I'm trying to figure out the difference. Phil: I'll try to get you the mm dimensions for the (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Help me plan for Mindfest.
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Welcome to Boston!!! (...) The easiest (and cheapest) way in my opinion is to take the Subway (We call it the "T" ). It is very safe and easy to use as long as you don't have a problem or fear of Subway's (Some, like my father do so I just thought (...) (26 years ago, 15-Oct-99, to lugnet.loc.us.ma.bos, lugnet.robotics, lugnet.robotics.events, lugnet.org.us)
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| | Re: Flex Cables (Does anyone have the 8485 CCII)
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Thanks Rob, The type I and II connectors can be seen at: (URL) flex cables are also shown with the "pssible" lengths for the 8485. When I scaled the cable on page 110, I came up with 17.2cm (and it came-up short when I built that assembly), but the (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | More powerful motor (was: stuff)
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Maybe the RCX could be rigged up to control a speed controller from an RC car. (...) Joel Shafer joel@connect.net (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Help me plan for Mindfest.
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Michael: If you're going to be traveling around Boston by "T," you'll want to get a day pass. (A one-day, unlimited use pass is $5.50--a very good deal. 3-day passes are also available.) You can grab these usually at any subway station, although (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | A java tool for real-time talking with people reading the same webpage.
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Hi, There is a java software called Wander at (URL) simply dragging and dropping a URL address or a Link to Wander window, you can see and talk to all the people who reading the same webpage right now. It is a good tool for on-line talking, (...) (26 years ago, 15-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Help me plan for Mindfest.
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(...) I have my doubts; tokens are cheap. You have to take seven rides/day for that to make sense. And that's a lot of riding on the T. (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Help me plan for Mindfest.
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I should have written, "... a pretty good deal." The pass is not advantageous if one is just going to one place and returning from it once in a day. However, Michael wrote: "Things don't start at MindFest until 4pm Friday night, so I plan to tour (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: More powerful motor (was: stuff)
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You need to be careful if you use more powerfull motors with lego construction. The plastic parts are very strong but you can easyly break teeth off of the gears or twist the rods with the current motors and a little bit of gearing. On the other (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | RE: Help me plan for Mindfest.
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<snipped Eric's description of how to get around> Eric, this kind of information is great! I'm going to be at Mindfest and my NLSO architect will be lollygagging around the downtown Boston area. Now it looks like I'll have all the info we need to do (...) (26 years ago, 15-Oct-99, to lugnet.loc.us.ma.bos, lugnet.robotics, lugnet.robotics.events, lugnet.org.us)
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| | Help me, too.
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Hi, I'm going to Mindfest. But I need help about transportation in Boston. Airport Longan to Amerisuites Hotel in Medford (116 Riverside Ave) Hotel to Tufts University Hotel to MIT Thanks a lot of and see you in Mindfest, Hazel Diaz San Jose, Costa (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | More powerful motors
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I am curious to know why you think you would need to amplify the RCX motor outputs? The Lego motors are very efficient under no load. But the bridge drivers in the RCX seem to cope with the stalled state (about 250mA). Unless you are going to use (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: More powerful motors
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I would like to see an RCX control a really fast RC car. It would be cool to see it pilot it flawlessly around a circle track. (...) Joel Shafer joel@connect.net (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | RE: Help me plan for Mindfest.
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Wait... For those of us staying at the Marriot, ther should be a free shuttle from the airport, right? I'll check up on this and let you know... Cheers, Ralph Hempel - P.Eng ---...--- The train stops at the train station, The bus stops at the bus (...) (26 years ago, 15-Oct-99, to lugnet.loc.us.ma.bos, lugnet.robotics, lugnet.robotics.events, lugnet.org.us)
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| | Re: interfacing the GP2D12
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Thats great Gary, This was the same conclusion that I'd come to myself, however I've now run into another problem with the otherwise brilliant 'D12 sensor. I'm currently using the Digitalker speech system from Jameco, and when the 'D12 is plugged in (...) (26 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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| | RE: stuff
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I've always assumed the material is polystyrene, probably a modified resin for impact resistance. You could basically eat this stuff, it's used for plastic forks, etc, but I wouldn't smoke it ;>) As to motors, several folks including myself, have (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Lego Rotation Sensor
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Hi there, I'm just back from a sneak view on the brand new Lego site. I noticed that it's now possible to order the rotation sensor as a spare part. My question is: can someone explain me how the sensor is build-up internally ? (did anyone open such (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Help me plan for Mindfest.
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There may or may not be a free shuttle but my advice is learn the T. Even if you're only in town for a weekend, it's a much better way to go. Plus the trains are much tighter headings than the 1/2 hour heading a shuttle is likely to be on. A cab (...) (26 years ago, 15-Oct-99, to lugnet.loc.us.ma.bos, lugnet.robotics, lugnet.robotics.events, lugnet.org.us)
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| | Re: Flex Cables (Does anyone have the 8485 CCII)
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Phil Watt <wattsup1@earthlink.net> wrote in message news:38073CB0.716941...ink.net... (...) I know all of the listed sets use the Type II. I believe the 5118 is Type II as well, I'll verify tonight along with the 8485 cable lengths. -Rob. (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Help me, too.
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(...) I am not real sure where the Amerisuites in Medford is but I will check a map if I get time. There are a few "T" stops (Red Line) in Medford so there is probably a good chance that you can use the "T". (...) I believe Tufts is in Medford so (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Lego Rotation Sensor
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ludo soete <ludo.soete@village.uunet.be> wrote in message news:FJnqLo.87@lugnet.com... (...) part. (...) internally ? (...) I have not cut one open yet, but I'm pretty sure it is an optical encoder. I tried to detect magnetic fields from outside it (...) (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: stuff
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(...) I've heard that LEGO bricks are made from ABS. later, greg (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | RE: stuff
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Just by way of clarification, ABS is a terpolymer (alloyed, if you will) of polystyrene: Acrylonitrile Butadiene Styrene. Jeff jeffrey.hazen@northmill.net (...) I've heard that LEGO bricks are made from ABS. (26 years ago, 15-Oct-99, to lugnet.robotics)
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| | RE: Help me plan for Mindfest.
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(...) <snipped out more gory transit details...> (...) Hmmm, Larry does not live in Boston, and yet he is intimately familiar with the transit system. Coincidence, I think not. The more likely explanation is that he is obsessed with trains, and (...) (26 years ago, 15-Oct-99, to lugnet.loc.us.ma.bos, lugnet.robotics, lugnet.robotics.events, lugnet.org.us)
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