 | | Re: How much can you shrink a dual differential drive?
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(...) Thanks a lot, Rosco. I think I'm going to go with Stefano Prosseda's variation, which you also mention on your webpage (URL) clearly didn't quite understand the concept and now see how my design had way too many gears only to accomplish (...) (23 years ago, 20-Mar-02, to lugnet.technic, lugnet.robotics)
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| | Re: How much can you shrink a dual differential drive?
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(...) snip (...) Here's yet another shrunken dual differential design. It uses worm gears to drive both differential housings as a space saving measure. This also the adds the feature (?) of a bit more gear reduction. There's a few pics of the (...) (23 years ago, 20-Mar-02, to lugnet.technic, lugnet.robotics)
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| | Sony's New Biped 'Bot
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Straight from the top of Sony Tower in Tokyo comes this press release on a newly developed "entertainment robot" - the SDR-4X: (URL) SDR-4X is without any doubt a prototype successor to the widely successful AIBO bot series. As always Sony haven't (...) (23 years ago, 20-Mar-02, to lugnet.org.ca.rtltoronto, lugnet.robotics)
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| | Re: Interesting but slightly off topic
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(...) For ~US$32k I'm guessing that some slight enhancements could be expected. The section referring to its ability to sing was amusing - just give it the music and lyrics (ie - program it) and it will sing on demand. Yeah, I had an Amiga once, (...) (23 years ago, 20-Mar-02, to lugnet.robotics)
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| | Re: How much can you shrink a dual differential drive?
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(...) Excellent color coding in your pics. Regrettably, I have no practical advice. When I built the differential drive in Dave Baum's book, I was dumbfounded by the principle. I look forward to to seeing what is clearly a demanding project. - Kyle (23 years ago, 20-Mar-02, to lugnet.technic, lugnet.robotics)
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| | Re: How much can you shrink a dual differential drive?
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(...) Well, I think several people have delved into this, but here's my contribution (URL) It doesn't solve the "dual speed" problem, but it's fairly small, and can be reduced further. ROSCO (23 years ago, 19-Mar-02, to lugnet.technic, lugnet.robotics)
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| | How much can you shrink a dual differential drive?
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Hi all, I've got an intriguing little MOC coming up that hopefully will interest both the technicheads and the robogeeks. It is a tracked vehicle with a twist, but you'll have to wait to learn all the details ;-) In the meantime, here is something I (...) (23 years ago, 19-Mar-02, to lugnet.technic, lugnet.robotics)
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| | BricxCC release 3.3.4.4
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I've released BricxCC version 3.3.4.4. It fixes a timeout problem when trying to find the Cybermaster brick (although not all users experienced this problem). It also fixes some problems on the Color tab of the Preferences dialog. It fixes the (...) (23 years ago, 19-Mar-02, to lugnet.robotics.rcx.nqc)
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| | Interesting but slightly off topic
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Sorry if this isn't the right forum, but ... (URL) like fun to me. Now if only we could find a way to pack that sort of CPU horsepower into a Lego brick ... hmmmmm. JB (23 years ago, 19-Mar-02, to lugnet.robotics)
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| | Re: RCX as a PGP engine
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(...) Definitely post it! Better than that, how about sending me the code and I'll add it to our robots section as a unique demonstration. (...) Shouldn't be a problem. Most of the source code in the official Sun package is easy to port to leJOS. (...) (23 years ago, 19-Mar-02, to lugnet.robotics.rcx.legos, lugnet.robotics.rcx.java)
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| | Re: H8 assembler
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(...) I'm not entirely sure why either, other than that it is extremely easy to add new language support to the editor component in BricxCC and I thought it would be cool if a user of BricxCC who also writes H8 assembler would be able to edit all (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.pbforth)
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| | RE: H8 assembler
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(...) No rest for the wicked, John. (...) I always specify the size. Some assemblers can infer the size from the operand, but it's usually better practice to specify it. The L suffix is not supported on the H8/300 variant used by the RCX. (...) I'm (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.pbforth)
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| | RoboTank a platform for triangulation
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Some days ago, i stared to build a tank like robot for my triangulation tests. Some pictures can be found at: (URL) Carsten (23 years ago, 18-Mar-02, to lugnet.robotics)
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| | Re: RCX as a PGP engine
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(...) I just 'ported' (euphemism for minor modifications) some code lingering on the web for fun and voila: MD5 on RCX is up and running (lejos). If anyone's interested, I can post the code. It allows for authentication (PC sends random challenge, (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.legos, lugnet.robotics.rcx.java)
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| | Re: motors are stuck...
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(...) This applies to the red 2x2 micromotor, not to the mini or power motor found in the RIS. I vaguely remember (try searching in LUGNET news) that the way to save a power motor, if at all possible, is to apply power in the right way, and not to (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.legos)
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| | H8 assembler
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I'm working on a syntax highlighter for H8 assembler for BricxCC. I downloaded a couple PDFs from Hitachi's website. I have the H8/300 Programming Manual (e602025_h8300.pdf) and THE INTRODUCTION OF HITACHI H8 MICROCOMPUTERS (introduction_h8.pdf). (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.pbforth)
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| | Re: motors are stuck...
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According to a book by Ferrari brothers ("Building Robots With Lego Mindstorms") here's what you can try: --- How to release a Jammed Micromotor A micromotor jams so easily, you should know what to do when it occurs. The following list should help: (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Cleaning the RCX
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Hi Chris, Thanks for the input. This is the kind of information I need. I have always relied on alcohol as a cleaner for contacts and I did not think of the effect it might have on the rubber contact. I thought the button might be a carbon contact. (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx)
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| | Re: New Book - Core Lego Mindstorms
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You have to wonder how the SDK could possibly do that. The only opportunity I can see for it doing this is with the binary files javac and java, but I doubt they have auto-update features. Maybe the applet JVM has this? p.s. Kudos for reading the (...) (23 years ago, 18-Mar-02, to lugnet.robotics)
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| | Re: Cleaning the RCX
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(...) Bob: Great page. :) I have one point of interest. When I have used Isopropyl Alcohol (at 99%) to clean the button contacts of tv remote controls, I have found that the black "rubber" button can degrade and erode. Maybe someone with more (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx)
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| | Cleaning the RCX
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I have been working on a page to assist in the cleaning of the contacts on the RCX. Principally the battery connections to the pc board and the control button contacts. If you have performed this service before, please check my work and see if (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx)
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| | Re: motors are stuck...
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just give Lego a call at 1-800-363-2140 they'll have the new stuff in the mail the next day. you don't need to send in the broken parts either ...although for the sake of all Lego enthusiasts please don't take advantage of that. good luck "Jeremy (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: motors are stuck...
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Thanks for the follow-ups. Well, he's still a "friend" - after all he did give me the stuff for free and with no guarantees that it would work. I guess it'll just be a chance to crack open one of these babies! I think the stuff is pretty old, and (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: motors are stuck...
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You may also be able to return them to Lego for free and get replacements, it depends on how old they are. I would try before you have to buy a new motor, they aren't the cheapest. Andy ----- Original Message ----- From: "Benton Jackson" (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: motors are stuck...
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Jeremy, The motors that come with Mindstorms are geared internally, and it's probably jammed gears that are causing you woes. Your "friend" gave you some broken motors. I've never taken one apart-- it snaps together in a way that looks easy to break (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
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| | motors are stuck...
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I recently inherited an RCX 1.0, a serial IR tower and a few motors from a gracious friend. After many headaches, I finally got legOS 0.2.5 running on RH 7.1 and am able to compile and DL programs to the RCX. There is one odd thing, however - of the (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
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| | 3Com HomeConnect camera - very Lego-compatible
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Hey, I just discovered that my 3Com HomeConnect USB camera is extremely Lego-compatible. It's so close I have a feeling it's not an accident. I built a very nice pan-tilt mechanism for it. What fun! Anyway, now I don't feel so bad that I bought the (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx, lugnet.robotics.vc)
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| | Re: Spectrum as source of Technic Spares
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"Ralph Hempel" <rhempel@bmts.com> wrote in message news:CAEBIOGHPFFJALB...mts.com... (...) (URL) mpSearchCode=SP> (...) ummm, is that US funds or Canadian cause if it's Canadian then those prices are really cheap. my 0.02USD mike "new job" fusion (23 years ago, 16-Mar-02, to lugnet.technic, lugnet.robotics.rcx)
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| | Re: Lego drivers for Labview
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(...) If you mean 'the software' it is sold by Pitsco Lego Dacta... and it's not freeware. I recommend it wherever I can. It's great. Jerry (23 years ago, 17-Mar-02, to lugnet.robotics)
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| | Re: Rechargeables for the RCX
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(...) I use rechargeable alkalines, Rayovac Renewals, to be exact. You will be amazed at how long they last. I do not wait for them to be fully discharged. It turns out that, with 2 sets, I recharge every couple of months. So far, they have not (...) (23 years ago, 17-Mar-02, to lugnet.robotics)
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| | Rechargeables for the RCX
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My RCX is eating batteries, probably because I can't stop playing with it. I want to start using rechargeables. Took a look over the postings on Lugnet, many of which are quite old and using which I think I could have supported any opinion I cared (...) (23 years ago, 16-Mar-02, to lugnet.robotics)
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| | Re: New Book - Core Lego Mindstorms
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(...) I have made the necessary modifications to leJOS (there was a clash with the new assert keyword) and then tried the Java SDK 1.4 with a few tests, it worked. What you have to do is use the CVS version and add "-target 1.1" as an option to (...) (23 years ago, 16-Mar-02, to lugnet.robotics)
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| | Re: Running Vision Command on XP
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(...) Ted (and all): Please forgive my ignorance, but could you explain or point me to an explanation of how I perform step 6. "Edit and import legovcs.reg into RegEdit" I'm not a computer jock (though I am fairly competant) and am nervous about (...) (23 years ago, 16-Mar-02, to lugnet.robotics.vc)
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| | Lego drivers for Labview
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Howdi, does anybody know where to get the drivers to program the Lego Brick in labview. Freeware please,... Thanx,... Greetings, ErX. (23 years ago, 15-Mar-02, to lugnet.robotics)
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| | Re: New Book - Core Lego Mindstorms
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I assume with the offfical 1.4 release? I have had several problems with the offical release including stability problems, incompatible code (some wierd 1.2 stuff), slow performance, and hanging event threads (they never return from calling the (...) (23 years ago, 16-Mar-02, to lugnet.robotics)
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| | Re: New Book - Programming Lego Mindstorms with Java
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Hi Michelle, Yes it was supposed to come out last year - it was delayed but now it's nearly completed. In addition to myself the author list is as follows (to give credit where it's due): Guilio Ferrari, Jamie Waldinger, Soren Hilmer, Jurgen (...) (23 years ago, 15-Mar-02, to lugnet.robotics)
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| | Re: LEGOCAM with Handy Board
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The Lego cam can be used as a sensor. See: (URL) Fay THE SHOP (URL) Potter" <jacobdp@earthlink.net> wrote in message news:3C925D84.CB6C47...ink.net... (...) Has (...) in (...) the (...) (23 years ago, 15-Mar-02, to lugnet.robotics)
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| | Re: problem with lnpd...help!?
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(...) this must be char test4 = 'a'; I think. Otherwise, you won't sent an 'a' anyway. But I can't imaginge why you want to do this. Michael Ash has shown a way to fiddle the strings into a contigous data area ready to be sent. But why do you want (...) (23 years ago, 15-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: New Book - Core Lego Mindstorms
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Yes, it's 100% compatible with the latest versions of the Java SDK. I use 1.3.1 myself and it works great. There were originally some problems with the SDK 1.4 beta but those have been worked out. (...) (23 years ago, 15-Mar-02, to lugnet.robotics)
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| | Re: problem with lnpd...help!?
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(...) That's wrong. You should write "char test4 = 'a';", otherwise you are implicitly casting the character 'a' to a pointer to store it in test4 (the compiler should warn you about this; use -Wall to catch these errors). (...) Then this line (...) (23 years ago, 15-Mar-02, to lugnet.robotics.rcx.legos)
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