 | | Annoying Journalist's Request
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Hi, sorry for interferring with this mailing list. I am a journalist from Germany, working for "Konr@d", a multimedia offspring of "Stern" magazine. Since the Mindstorms product has just been released in Germany, we thought it would be a nice idea (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: Robot navigation
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Try (URL) for a cheap 'n' cheerful approach, go to (URL) click the 'Search inventions' item in the Navbar on the left, and search for Compassbot. Cheers JP (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | RE: AI and even more exiciting stuff
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(...) Well, we are trying to teach AI, not embedded systems :) Towards that end, we've sort of tried to simplify things as much as possible for the kids who are taking the class, since most of them will probably never do an embedded system again. (...) (26 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Sharp GP2D02 with out expansion board
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Handyboard Community, Has anyone written code for the GP2D02 sensor without the expansion board. I have a group of High school kids that have KISS institute robot kits. This kit comes with a handyboard and LEGO's but no expansion board. Being on a (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | Re: need a text editor
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(...) I highly recommend TextPad (www.textpad.com). I use it for writing all my C, Java and HTML code. It allows you complete control over formatting (auto-indent, tabs to spaces, etc.) and a multitude of useful tools, including parenthesis (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | RE: AI and even more exiciting stuff
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(...) OK, time to get out the soapbox. If you are trying to teach AI, and are using floating point math, then you probably have really fast computers with floating point processors that are sometimes quicker than equivalent fixed point calcs...... I (...) (26 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Re: Annoying Journalist's Request
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To the list: this morning is a break for me, so I'm going to use it to type this out. Hope no one minds that it gets sent to the "annoying journalist" as well. Here at Duke, we are teaching a class with the mindstorms. Recently, we completed a class (...) (26 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.legos)
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| | Re: Data acquisition through analog input
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Dear Mr. Kalyan, Maybe you can try those RF module from www.Glalab.com Look for their guide on connecting the holtek IC to their RF module. I believe that will help you a lot. Regards, William (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | RE: AI and even more exiciting stuff
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(...) Depends exactly what you're teaching in the class, and how much time you have. Spending a session teaching fixed point math may well mean that you have to miss out a useful AI tool. If the students already understand how to call, say (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: Data acquisition through analog input
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(...) Do you mean < www.glolab.com >. Victor (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | RE: AI and even more exiciting stuff
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(...) Right you are. I guess I wasn't clear headed when I wrote my original response. I wanted to say that engineering (or CS) students shuold learn about fixed point methods at some point in their academic careers. The earlier the better. I was (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: AI and even more exiciting stuff / off-topic
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(...) Ah, I almost forgot. I saw an applet somewhere on the University network that translates some higher language, possibly C or a subset of Java, into output suitable for universal turing machines. Not quite the performance king, but interesting. (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: AI and even more exiciting stuff
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(...) Here in Karlsruhe, engineering education is 95% math in the first year, and at least 60% in the second. Never mind your major - you're doing maths. Linear algebra, real and complex analysis of multiple variables, numerics, stochastics, (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | communications
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Does anyone know where I could get some really good information concerning serial communication for the handyboard. I'm wondering if it's possible to have the handyboard communicate with a PC and vice versa. I'm looking for something wireless but (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | Handyboard low voltage motor control
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Hi All, Most of you guys seem to want more power to control motors, well, I want to go the other way. I'm looking to drive 1.5v motors with the handyboard. The lowest voltage the L293 can take is 4.5v (Vmin of Vcc1), and that still has my motors (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D02 with out expansion board
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Yep, I did. See (URL) Livick (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard low voltage motor control
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How about a resistor in series? Gary Livick (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | RE: AI and even more exiciting stuff
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(...) Absolutely. Just not in our class, especially since it is an advanced (jr./sr. year) class which assumes a certain grounding before entry. -Luis ###...### Profanity is the one language that all programmers understand. -Anonymous ###...### (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: AI and even more exiciting stuff
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From: "Ralph Hempel" <rhempel@bmts.com> (...) Things are probably turning for the worse in this regard. When I started at my university (Carnegie Mellon) in 1991 in the CS dept you basically got a CS degree by also getting a math degree (and the (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | RE: AI and even more exiciting stuff
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Richard, I hope you don't mind me using your quote... <snipped discussion of junior programmer and temp sensor application) (...) Yesss! I am going to tie the moon mission into my panel presentation at Mindfest. Here's a source I used on the Apollo (...) (26 years ago, 18-Oct-99, to lugnet.robotics.rcx.pbforth, lugnet.robotics)
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| | Re: Handyboard low voltage motor control
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That'll work, of course, but that also means I'll be dissapating about 8 volts at .5A through the resistor... Gary Livick wrote in message <380B55B1.1C3703C4@p...ll.net>... (...) to (...) still (...) but (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard low voltage motor control
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Good point... There is another way. You can build your own h-bridges using mechanical relays and maybe a few diodes. They drop zero volts, which is good. However, you obviously can't PWM the things. If you just want rudimentary speed control, you (...) (26 years ago, 18-Oct-99, to lugnet.robotics.handyboard)
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| | Lego Mindstorms Tower
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Anyone know where I can order a replacement IR tower for my Mindstorm? Thanks <G> (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | RE: AI and even more exiciting stuff
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32K is a ton of memory for embedded 8 bit code... if you need data storage and processing then that's an entirely different thing -- it could easily make AI difficult. As far as fixed point vs. floating point, I once worked on a project where they (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: AI
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Yes you can, just take a look at some of the projects on my website. CU Bert Lego robots and artificial intelligence (URL) Can we make these things learn? (...) program 1 write program 2, write to program 3 etc, and use a some kind of a genetic (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Question:Where do I find a cutaway of a Pnumatic Valve
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I know someone has a web page with some pictures of a LEGO pnumatic valve cut open/opened up. Could someone point me to the URL for it? James Powell (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: Lego Mindstorms Tower
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Keith, LEGO Dacta, #979713 US$25 800.362.4308 (URL) - Nick - (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | RE: AI and even more exiciting stuff
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(...) Ummm, respectfully, yes. If the team took days to rework the code when control data tables change, then they were not using tools and methods appropriate to the task at hand. I'm hoping you weren't "them" :-) The algorithm is the same whether (...) (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | Announce: NQCIPC -- simple IPC for Not Quite C programs
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I'm proud to announce the release of NQCIPC, a package implementing simple semaphores and messaging for Not Quite C running under MindStorms and Cybermaster. The API is fairly simple, and provides for intertask communication in RCX programs. The (...) (26 years ago, 18-Oct-99, to lugnet.robotics)
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| | Re: Announce: NQCIPC -- simple IPC for Not Quite C programs
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[forwarding a copy to the .rcx.nqc newsgroup... --Todd] (...) (26 years ago, 19-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: RCX Firmware and SP
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(...) [...] Hi Ralph, Could you please explain more about consequences for pbFORTH user? As far as I can see, pbFORTH uses fixed 256-byte stack - does it mean that pbFORTH suffers from this problem too? Thanks Sergey Udovenko (26 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | Wot no RCX power connector?
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When did this vanish then? All the online information I can find says that the RCX has a 6-12V AC power connector. My one that I bought this weekend doesn't :( (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | Re: Data acquisition through analog input
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I am sorry, it is www.glolab.com ----- Original Message ----- From: Mulampaka, Kalyan (GEIS, ASI) <Kalyan.Mulampaka@geis.ge.com> To: William Ho <ukho@tm.net.my> Sent: Monday, October 18, 1999 11:10 PM Subject: RE: Data acquisition through analog (...) (26 years ago, 19-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Wot no RCX power connector?
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I just bought a second RCX (version 1.5., on sale at K's Merchandise here in Illinois for $155). I just checked--it doesn't have a power connector either! :( Mike Kory Kevin Bracey <kevin.bracey@pacemicro.com> wrote in message (...) (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | Wot no RCX power connector?
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RIS for $155!!!!! Is that a special discount limited offer price!!! Limit one per household? The RCX brick lists for $129. So you get all the rest for $26!! JB (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | Re: Wot no RCX power connector?
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Does this mean that RIS 1.0s are going to rapidly become *more* valuable than RIS 1.5s?! Stuart PS That seems a very cheap price - I thought they were $210? (...) (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | Re: Wot no RCX power connector?
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I just pulled out my receipt. It was $155.97. That's 20% off their normal price. I bought the last one at my store here in Champaign, Illinois. I don't know where the other stores are. If I remember correctly, they had the Droid system for about (...) (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | RE: RCX Firmware and SP
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(...) Unfortunately, yes. The current version of pbFORTH allocates a 256 byte stack, but it's JUST above a 256 byte boundary. When you run the test code, everything works, but if your stack depth is around 12 and you run SENSOR_READ, it allocates (...) (26 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | RE: Wot no RCX power connector?
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(...) My guess is it vanished after they got too many "defective" units back after folks started putting adapters with the wrong voltage on their bricks. Even a wired voltage spike might kill the brick. The battery route is safer from a product (...) (26 years ago, 19-Oct-99, to lugnet.robotics)
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| | RE: Wot no RCX power connector?
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(...) Correct me if I'm wrong, but doesn't that mean that TLG have effectively been lying if they claimed that the RCX unit itself is still the RCX 1.0? It seems like it may be worthwhile complaining (does anyone know an email address for (...) (26 years ago, 19-Oct-99, to lugnet.robotics)
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