 | | Re: Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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(...) Hi Kevin, Here is a simple circuit that also require some initialisation: (URL) didn't find the digital equivalent of the .IC (initial condition) used in analog simulations, but if you use the probe tool (arrow on the screen capture) and click (...) (22 years ago, 28-Nov-03, to lugnet.technic, lugnet.robotics)
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| | Re: Please help (Follow up to my earlier post)
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(...) My laptop is a Satellite 2455 series. Maybe laptops of this serie don't crash but produces the strange behaviour that I had with the USB Tower. I'd like to know if someone else had the same problems that I had. Anyway, it's good to know that (...) (22 years ago, 28-Nov-03, to lugnet.robotics)
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| | Re: Please help (Follow up to my earlier post)
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(...) Bricklink (...) make (...) I (...) transmit (...) an (...) brickCC). (...) 300 (...) this (...) I'd be interested in seing if your laptop was a p series (P15, P25, etc). There is another person on the lugnet.robotics.rcx.robolab who has had (...) (22 years ago, 28-Nov-03, to lugnet.robotics)
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| | Re: Opening COM port error
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(...) This probably is an issue of leaving your Port object around after you're done using it. You have a memory leak in each routine, because you call 'new RCXPort();' without ever calling 'delete port;' on the object. You should definitely call (...) (22 years ago, 28-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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(...) Philo, I downloaded the tools, and entered the base schematic for Quad242. Quad242 depends on some initial conditions where 4 of the 5 flops have a value of 1. I've read the docs and not found a way to preset the flops. Any ideas? Your choice (...) (22 years ago, 28-Nov-03, to lugnet.technic, lugnet.robotics)
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| | Re: Please help (Follow up to my earlier post)
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(...) Hi Rob, I have a Toshiba Laptop with a USB 2.0 and I bought a USB Tower at Bricklink because my Laptop doesn't have a serial output (I think that they do not make laptops with it anymore). At my first try my computer didn't lock up, but I (...) (22 years ago, 28-Nov-03, to lugnet.robotics)
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| | Opening COM port error
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Hi guys, First of all, thanx Brian, but I managed to solve the weird firmdl.bat problem by fooling around with different batteries and IR range levels. Secondly,I'm trying to send data packets to the RCX through java methods called from a C++ (...) (22 years ago, 28-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: Robolab, byte codes and assembler
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---...--->snip (...) I guess the competition asks you to run a certain distance as precisely as possible, or/and do some precise turns. We often experienced this kind of challenges in our school. The best way seemed to be to collect statistical (...) (22 years ago, 28-Nov-03, to lugnet.robotics.rcx.robolab)
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| | robotics
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hi i just found this (URL) looks like robitic bricks :) pixel (22 years ago, 28-Nov-03, to lugnet.robotics, lugnet.technic)
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| | Re: Robolab, byte codes and assembler
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(...) <snip> (...) I'm quite interested in the alternative firmware for myself. However, for this particular problem, if a correct rotation count is my "Apollo 13's needed filter", then Robolab is the "cover of the flight manual" - it's what I have (...) (22 years ago, 28-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Pneumatic Quadraped 242
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(...) Thanks Eric! (...) Sure! (...) I just ordered up 20 small pistons to make one that is faster. I should add head and tail. I wonder if a tail and a head can be articulated so I can reduce foot side. (...) Thanks Eric. (...) Very cool Eric! (...) (22 years ago, 27-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics, FTX)
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| | Re: Robolab, byte codes and assembler
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(...) It really is. I do think somebody made a mistake specific to the rotation sensor, though. I haven't decided yet whether it's the firmware, the sensor, or just the overall mechanism. I can understand how it got past quality control - sometimes (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) Unfortunately, I fear the comparison is all too true! So, is my robot going to blow up? ;) (...) I'd appreciate some specifics. So far, I have not been able to find a way to do this in Robolab. I wrote some code to test raw sensor values and (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Pneumatic Quadraped 242
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(...) Perfect! (...) Way to go! (...) (URL) Facinating! (...) Intense! (...) Can I build a Mecha Sheith for it? An outer skin? Can I can I! Question: Any entertainment for a Tail of some sort to study the effect during articulation? Nice work. e (...) (22 years ago, 27-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics, FTX)
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| | Re: multiple motors
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(...) hmm. see rule #1: (URL) my BIGGEST piece of advice for your sumo robot: make SURE it does not leave the sumo area on it's own." :) Steve (22 years ago, 27-Nov-03, to lugnet.robotics.rcx)
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| | Re: Robolab, byte codes and assembler
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OK You do something great, and all the world is looking at it, finding the finest detail one could have made much better. That's the power of internet-exchange. Don't take this personally. I only wanted to remind the great job they did at LEGO's (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) Please don't take my post as a criticism of the original firmware, I merely wanted to point out alternatives. I agree, the 3ms sample rate is more than adequate for most applications. (...) Yes, the RCX is rugged in many respects, but I think (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) We should not forget that the RCX has initially been designed for kids. So the standard firmware should be considered according to the initial aims, which were to provide a really great tool - toy for children. Therefore the firmware designers (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | External Power Supply
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Hi ! I also have already used an external power supply for my RCX, which was a battery pack of 7 cells (8,4 V) with 2Ah each. It worked quite well but from one day to the another my RCX didn't word any more. I haven't found out jet, why my RCX (...) (22 years ago, 27-Nov-03, to lugnet.robotics)
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| | Re: Robolab, byte codes and assembler
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(...) By contrast, BrickOS continuously samples each sensor at a rate of about 6.7 samples per millisecond. This is 20 times more often than the standard firmware. It's no wonder it's more accurate at higher rotation rates. Of course, it also (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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---...--->snip (...) Welcome to LEGO Mindstorms robotics: do great things in real world with imperfect tools and objects. That's what makes it so interesting. It's always the Apollo 13 challenge: "Here guys, that's what they have on bord! Come on (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) That may be another problem to be solved; haven't got there yet because simply counting rotations has been unreliable. I mean with a motor shaft connected to a rotation sensor - no wheels, no robot! Can't even count rotations correctly. (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) I tend to think that positionning errors are more a problem of slip/skid than a problem of lost counts... Philo (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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Thanks for the response. (...) It seems to me it's a design flaw in the entire method of counting rotations, which relies on the theoretical ideal of "instantaneous" voltage changes, which can't be produced. You can't go from 2V to 5V without (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) Yes, I did read your information. It was very helpful - the best stuff I found on the subject. But as you said, modifying the sensor would probably disqualify. But, that does make me think again about the recent unavailability of the part . . (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: multiple motors
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(...) Rather well... (...) ...but it was beaten by a simpler but slightly heavier 'bot! And it sometimes committed suicide too :-(( Philo (22 years ago, 27-Nov-03, to lugnet.robotics.rcx)
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| | Re: Robolab, byte codes and assembler
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"Don Stauffer" <BrainChild@Skyler.com> wrote in message news:Hoz4Gp.1zto@lugnet.com... (...) <<SNIP>> (...) The rotation sensor bad counts cannot be fixed at the byte-code level. The problem is "native" to implementation in the underlying firmware (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | !!!!!!REMOVE!!!!!!!
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Please remove this email address from all you email lists. -----Ursprungligt meddelande----- Från: Alex Jayasundara [mailto:AJayasundara@onfin.com] Skickat: den 24 november 2003 18:25 Till: Ruth; lego-robotics@crynwr.com Ämne: Re: HELP, please! USB (...) (22 years ago, 27-Nov-03, to lugnet.robotics)
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| | Re: Robolab, byte codes and assembler
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Hello Don, Did you had a look to my analysis of this problem ((URL) But unfortunately I don't think that my modification is "competition-legal"... I agree that sampling can occur at the wrong time, but this should not occur more often at low (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) I've used some of the LabView features, though it seems like they work best when used on constants, rather than variables or containers. My impression, though, is that the non-Robolab-specific LabView features aren't what I'm looking for (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: failure in communicaton between RCX & IR Tower
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(...) fine (...) (all (...) Ya, its a real pain in the arse... Rob (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) Robolab can access LASM code (Lego Assembler) which may allow you to write instructions that fit your needs. The LASM documentation is part of the Mindstorms 2.0 SDK available from (URL) not an assembler programmer so I have no idea if this (...) (22 years ago, 27-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: Robolab, byte codes and assembler
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(...) Two problems: 1. From what I've read about the problem, the speed I ran it at was right in the "sweet spot". 2. BrickOS would not qualify for the competition. I wonder if (hope?) the recent unavailability of rotation sensors at Pitsco is (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab, FTX)
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| | Updates on addresses of sites under ozBricks
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Hi everybody, Due to few changes under ozBricks server, I wanted to update everybody regarding my sites: 1. The ozBricks links sites new address is: (URL) Links might not work for a while (until the entire changes will be done). Please updates your (...) (22 years ago, 26-Nov-03, to lugnet.general, lugnet.castle, lugnet.cad, lugnet.robotics, lugnet.technic, lugnet.space, lugnet.starwars, lugnet.trains, lugnet.pirates, FTX)
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| | Re: failure in communicaton between RCX & IR Tower
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Hey, Rob, that's what I was doing last night as well.. but I was installing the w2kpro as my virtual machine (VMWare). However, I ran into some system problem and I have to do this again today. If it works with the w2kpro on your toshiba satellite (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Spybot meets M8 Mikrocotroller
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I’ve started a project to extend the spybot port via an atmel M8 mikrocontroller mini modul.The modul is appropriate together with a battery on the roof of the spy. The modul is connected with the spybot by the vll interface. The software for the M8 (...) (22 years ago, 26-Nov-03, to lugnet.robotics.spybotics)
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| | Re: Robolab, byte codes and assembler
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(...) Don't run it too quickly or too slowly. (URL) Um, that's all I know, besides using BrickOS which has code to make it more accurate. You mentioned that already. Actually, now that I think about it, BrickOS might be able to run assembly language (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab, FTX)
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| | Robolab, byte codes and assembler
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Having investigated rotations sensors thoroughly, I conclude they have some serious design flaws. Most notably, some samples taken during voltage transitions can be impossible to differentiate from samples at entirely different rotational positions. (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: multiple motors
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(...) So, how well did it work? How did the robot do? (22 years ago, 26-Nov-03, to lugnet.robotics.rcx)
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| | Re: Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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(...) To do that you have to use the simulator in analog mode, I'm not sure it would work on that kind of circuit (and if it did the simulation would be MUCH slower) Philo (22 years ago, 26-Nov-03, to lugnet.technic, lugnet.robotics)
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| | Re: Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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(...) Philo, Have you seen this? (URL) amazingly like your SR flop schematics. Kevin (...) (22 years ago, 26-Nov-03, to lugnet.technic, lugnet.robotics)
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| | Re: Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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(...) Philo, Hey! Great stuff! I've been aware of the electrical equivalence, but not mentioned it. Maybe if you put capacitors in series at the inputs of each flop, your test points might have less vertical slope. I'll probably use the simulator to (...) (22 years ago, 26-Nov-03, to lugnet.technic, lugnet.robotics)
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| | Re: multiple motors
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(...) (URL) such a mechanism I built in my latest sumobot... (sorry, bad photograph) Two gear shifts are activated at the same time, one for right wheels, the other for left wheels. The gearshift is activated by a motor controlled by RCX, gearing (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx)
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| | Re: multiple motors
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(...) Yes, thank you - you explained it very well. The day after posting the question, I realized a differential would solve the problem... but you stated the solution far more clearly than I had thought of it. Now, of course, I'm trying to think (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx)
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| | Re: External power supply ?
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(...) There was a rumour that 2.0 would have a power jack, which proved to be false when it came out. Personally I also sometimes use a stabilized 9V 1.5A supply, but as the others said, be careful with that. Jürgen (22 years ago, 26-Nov-03, to lugnet.robotics)
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| | Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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(...) Hi Kevin and all, I wanted to experiment with your sequencers without fussing too much with time consuming building, so I used simulation... I used a free electronics simulator, CircuitMaker Student ((URL) Piston + switch are equivalent to an (...) (22 years ago, 26-Nov-03, to lugnet.technic, lugnet.robotics)
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| | Re: failure in communicaton between RCX & IR Tower
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"Elizabeth Mabrey" <emabrey@storming-robots.com> wrote in message news:HoMq73.B9J@lugnet.com... (...) I (...) ceased (...) I (...) OK, I have the problem fixed. You may not like the remedy, but it worked lastnight flawlessly. Oh, and the PCMCIA USB (...) (22 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: External power supply ?
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(...) Agreed... but batteries end have the right geometry so RCX holder prevents backwards insertion. Philo (22 years ago, 26-Nov-03, to lugnet.robotics)
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| | Re: Read Receipt requested from "Chris" messages
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i'm Chris. i must apologize and yeah, i find it irritating to get back a bunch of acks or to get a 'send receipt' notice from a mailing list/newsgroup when reading. in defense, the yahoo groups(where i post alot) appear to strip out the requests so (...) (22 years ago, 25-Nov-98, to lugnet.robotics)
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| | Read Receipt requested from "Chris" messages
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Just about every time I read a message from "Chris" in this newsgroup, my browser asks if I want to send a reply indicating I received the message. I have some problems with this. First of all I don't like having e-mail trigger unexpected activity. (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: External power supply ?
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I've done something similar but used wooden dowels cut to size. No harsh chemicals to mess with. :) Jim West www.jameswest.com The box said Windows 95 or better, so I installed Linux. ---...--- Original Message ---...--- From: "Philippe Hurbain" (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | RE: External power supply ?
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<SNIP> (...) Perhaps button snaps would be a much safer alternative to sawing on a battery... (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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(...) You're right, many sellers will not ship internationally. You can click the following link to search BrickLink for a serial tower (cable sold separately) although there is only one listed for sale right now, and the seller ships in the U.S. (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: External power supply ?
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Hello Ilja, (...) Here is the method that I used in my motors tests ((URL) that require no modification to RCX: use two fake batteries assembled from the sawed ends of old alkaline batteries, maintained at the right spacing with rods of hot melting (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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(...) 100% (...) i gotta learn more about bill gates. i know of no other guy who can consistantly 'break' things and standards, and force hardware ideas that have so many problems, and still become a bulti-billion-gazillionaire... (most original (...) (22 years ago, 25-Nov-98, to lugnet.robotics)
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| | Re: External power supply ?
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(...) (URL) in french but google can understand it ;-) nanobapt (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | External power supply ?
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Hello, for work i've been building a lego crane, which is used to attract people to my company's stand at fairs/conferences. One of the problem is the batteries. It's annoying that every once in a while someone has to change them. I've heard that (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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(...) Thanks for your advice, but I am in sweden. Here it is not so easy to find parts and not all the companies sell internationally. My other concern is that if it really is my computer that doesnt work, it might not work will the seril tower (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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(...) I am at home now, tried my tower on my home pc and it works there (different computer), so I know now that the tower is ok. I have contacted the VIA support, to see what they think about the matter. I am going to install bricxCC to see if it (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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(...) I've also heard that USB and Plug-and-Play support on Windows 2000 is not 100% reliable and probably never will be no matter how many service packs you install. (...) I would agree with this. Although the serial tower requires a 9V battery and (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | RE: HELP, please! USB tower problems
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Until you try the IR tower on another computer (that is not identical to yours), you have no way of knowing if the tower is the problem is in the USB device or in the USB chipset. At this point, I'd cut my losses (and time) short and spend $25 on a (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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<<Hi, <<I am running out of options. If there are any service packs to apply pls do <<so and give it a try. I think the best option is uninstall and start from <<scratch. This doesn't sound good but I myself don't have any options. <<Wish you best. (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: multiple motors
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(...) Yes, that was the problem Brian was having. And, because the LEGO motors are so efficent, they work really well as generators. So, if you hook two together, and try to turn 1 and stop the other, you will have problems. I'm not sure I explained (...) (22 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Re: HELP, please! USB tower problems
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(...) Hello again Rob, I have my windows OS updated. (Service packs 4.0 and all the other updates.) I have been doing some research on the Internet and it seems that the problem might be on my chipset: VIA Technologies Inc VT8366/A, VT8367 Apollo (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | RE: HELP, please! USB tower problems
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Ruth, If the tower works on another computer, then at least one of the following will be true: 1) There is some sort of hardware conflict that is aggravated by accessing the IR tower 2) There is a software conflict 3) The computer has a combination (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: Weird downloading error
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Just some general ideas. If you're not using the firmdl or lejosfirmdl that came with lejos, try using one of those. Some versions of some downloaders have trouble with the lejos firmware. If you haven't tried fresh batteries in your RCX, try that. (...) (22 years ago, 25-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: multiple motors
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(...) I'm just thinking out loud here, but it seems that the problem with the two middle motors is that they are wired together. So even if the RCX is told to float the motor output, both motors will want to turn together. If one turns, it will act (...) (22 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Re: multiple motors
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(...) Well, I've never actually tried running six motors directly from the RCX. However, I have used three motors to drive a sumo robot. And I've also used four motors (two on each side) to drive six wheels (two on the right, two on the left, and (...) (22 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | Re: HELP, please! USB tower problems
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(...) night by (...) again. (...) I assume you have already done this, but I would like to ask anyway: Have you installed all the Windows updates? I do know for a fact that (for Windows XP anyway) that Service Pack 1 included updated USB drivers. I (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Weird downloading error
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Hello ppl, I have this weird problem where I can't seem to download the lejos firmware completely onto the RCX. The counter on the RCX lcd counts up to 20 as the firmware is downloaded while the LCD also shows a weird 'V' sorta symbol on the far (...) (22 years ago, 25-Nov-03, to lugnet.robotics.rcx.java)
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| | Re: HELP, please! USB tower problems
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(...) Hello Alex, I have done as you suggested. I have a game pad and seems to work without problems. I know my computer does not have any virus because it is scanned every night by our server. Any other ideas? I guess I will have to unistall (...) (22 years ago, 25-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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Hi, I would try this. 1. Using any other USB based device and test the USB port. 2. Scan the machine for viruses. Looks like you driver is getting uninstalled by an application. ( This is my own idea). Hope this helps. Alex Jayasundara ----- (...) (22 years ago, 24-Nov-03, to lugnet.robotics)
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| | Re: multiple motors
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(...) ...I love understatment. sigh... (...) OK, in trying to implement this I've come to an interesting impasse. Calculations suggest that for a 4 lb sumobot with reasonable tires would "benefit" from six motors, three on each side (differential (...) (22 years ago, 25-Nov-03, to lugnet.robotics.rcx)
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| | JCB JS220 Excavator
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I have finished the webpage for my JCB JS220 Excavator model and placed it online here :- (URL) The model is pneumatic/electric and is operated by a separate hand controller which also contains the pneumatic pump and pressure cutoff switch. Purists (...) (22 years ago, 25-Nov-03, to lugnet.announce.moc, lugnet.technic, lugnet.robotics, lugnet.build, lugnet.loc.uk, lugnet.modelteam, FTX) !!
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| | Re: HELP, please! USB tower problems
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I have check under USB Lego Tower Diagnost and it reads: The driver failed the AddDevice request (0x!F) Hope this helps. Thanks again, Ruth (...) (22 years ago, 24-Nov-03, to lugnet.robotics)
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| | Re: HELP, please! USB tower problems
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Hello Rob, thanks for your reply. I have manually installed the new driver without any success. Even worst, now my tower doesn't work with RIS 2.0 either! Same thing, works for 20 seconds and then can not find the driver anymore. Any other (...) (22 years ago, 24-Nov-03, to lugnet.robotics)
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| | Re: Trains, DCC, and pbForth
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In lugnet.trains, David Koudys wrote: <snip> (...) <snip> This weekend was exceptionally busy, but I had time to play with the layout. Took my laptop downstairs, set it up with the IR tower, and loaded up Full Throttle. Wow! Pretty nifty piece of (...) (22 years ago, 24-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | Re: HELP, please! USB tower problems
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(...) work (...) May not be of much help, but the 2.5 SDK from the Lego website has an updated USB IR tower driver. You may try using it. I think you may be able to go to the Lego website and search for "SDK" to find the download link. You will (...) (22 years ago, 24-Nov-03, to lugnet.robotics)
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| | HELP, please! USB tower problems
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Hello everybody. I hope I am posting on the right newsgroup, if not please feel free to move this thread. I have recently purchased Lego mindstorms, but for my disappointment I have not been able to do so much with it. My problem is that windows can (...) (22 years ago, 24-Nov-03, to lugnet.robotics)
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| | Re: Pneumatic Quadraped 242
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(...) Thanks Philo! So far the feedback on the sequencer paper has been positive. Now that I've learned enough to write that paper, I'm prepared to make some really complicated pneumatic circuits. The cornerstone of the sequencer design methodology (...) (22 years ago, 24-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics)
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| | Re: Pneumatic Quadraped 242
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(...) Thanks Tobbe! (...) How would turntables help the design? Right now the whole thing is studless except for the feet. To use the studly turntables would require major framework redesign (not that that is a bad thing :^) You are right it is not (...) (22 years ago, 24-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics)
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| | Re: Pneumatic Quadraped 242
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(...) Cool! Would it benefit from turntables between the feet and legs? These turntable 2 x 2: (URL) these turntable 4 x 4: (URL) like it looses alot of traction, perhaps if the foot could remain more still it would be better? (22 years ago, 24-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics)
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| | Re: Pneumatic Quadraped 242
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Thanks, Kevin, quadraped explanations are very interesting, and you sequencer paper is a "must read" !!! Philo (22 years ago, 24-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics)
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| | ERIKA 1.2 available for download...
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ERIKA 1.2 available for download! This version includes: - enhanced infrared support (single and multi-byte send!) - infrared transmission bugfix - PWM support now can be installed on timers T80/T81 depending on thefeatures (notes, IR transmission) (...) (22 years ago, 24-Nov-03, to lugnet.robotics.rcx)
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| | Re: Pneumatic Quadraped 242
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I got a new web site with plenty of room, so I've uploaded Quad242 movies. The website is (URL) As usual, my creations are listed in chronological order, so Quad242 ((URL) is at the end of the creation list. There are movies for walking forward and (...) (22 years ago, 24-Nov-03, to lugnet.technic, lugnet.build, lugnet.robotics)
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| | RE: usb problem
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I don't use Linux, right now I am using Windows XP. -----Original Message----- From: h.gokmen@btinternet.com [mailto:h.gokmen@bti...ernet.com] Sent: Thursday, November 20, 2003 4:20 AM To: rfkrakora@insightbb.com; lego-robotics@crynwr.com Subject: (...) (22 years ago, 22-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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Thanks to you all, who have commented my imaginations. The most veto comes from alex: (...) The statement does not contain the logical error you see. Ok, ok, i should have written "subroutine" (or method) instead of program. So your are right. (...) (...) (22 years ago, 22-Nov-03, to lugnet.robotics)
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| | RE: Trains, DCC, and pbForth
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(...) DOH! Of course. In the fire alarm business, we have a three state voltage out to the sensors. Usually the Vout is 24V and the device can respond when the voltage falls to 5 V. The devices have a power supply that is basically a big cap and a (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) From what I've read, most DCC layouts have a separate small programming track anyways. This way a loco can be safely programmed without having to remove all the other locos from the layout[1]. So, you could hook output A of the RCX to the (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) Yes, sounds like fun! And, that DZ123 I recently posted about would be ideal for the job. I think I'll have to order one or two more to test this out. One change to LDCC that would help facilitate this would be the ability to configure LDCC to (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | Re: Trains, DCC, and pbForth
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(...) So if I understand this correctly, my idea of inserting some kind of optoisolator or other power driver between the RCX and the track would interfere with LDCC receiving the ACK signal. Or could the sensor 1 input still be (safely) connected (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) The basic DCC ack is defined as an increase of load on the track of at least 60ma for 6ms +/- 1ms. Normally this happens on a quiet track where all you have powered is the decoder being programmed at the time. However, if you have a bunch or (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Trains, DCC, and pbForth
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(...) Cool. I think that this is the key to getting DCC into wider use. After all, there are only so many trains that will fit onto a layout unless it is truly massive. But there are a lot of potentially motorized items on a layout that could be (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | Re: Trains, DCC, and pbForth
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In lugnet.trains, Chris Phillips wrote: snip (...) I'm just going thru my mind (which is always a bad idea), and this would be, as stated, very easy-- My DCC chip has motor out, and 2 light wires out. Connect 'em to a electric plate and we're good (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | Re: Trains, DCC, and pbForth
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In lugnet.trains, Chris Phillips wrote: snip (...) snip (...) I know that I was one of those 30, Chris--sorry about not getting back to you. I d/led it but never actually used it yet :( So busy just getting a layout up and running--making buildings, (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | Re: Trains, DCC, and pbForth
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(...) I have been working on a different project toward the same end-- improved train layout automation, and I have had similar questions as to whether it is worth the effort for the small number of people who might actually benefit from it. Since (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth, FTX)
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| | RE: Trains, DCC, and pbForth
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(...) Dave, don't take ALL the fun out of driving your trains :-) How about being able to focus on just one train that you control, but automate things so the OTHER trains don't hit yours? Your description was great, except that it involves MANY (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Are there GOTO statements in NQC?
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(...) Actually, this is a common misconception. In Java, there is no guarantee that memory is _ever_ reclaimed. It is perfectly permissible by the specification (and quite common in embedded applications) that garbage collection is _never_ done. At (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Trains, DCC, and pbForth
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In lugnet.trains, Ralph Hempel wrote: <snip> (...) Now here's a thought--a truly automated layout, such as the following-- The RCX has sensors (either light or magnetic/light (as Jeff Elliot made up) to detect the trains as they pass) connected to (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Robotex2003 Winner: Lego
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Hi all! I am not in to lego robotics myself, but I want to share this: At the Robotex 2003 ((URL) ) competion, the winner was the Lego robot. I did not follow the show that much, but I did notice how efficient the Lego robot was, how fast it found (...) (22 years ago, 21-Nov-03, to lugnet.robotics, lugnet.general, lugnet.mediawatch)
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