 | | Re: flame sensor
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(...) Oops, I guess I was wrong, then. Thanks for the correction, John. :-) ~Mike (...) (23 years ago, 23-Dec-02, to lugnet.robotics)
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| | Re: flame sensor
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I know that the terms of use for lugnet prohibits advertising, but I assume it permits anti-advertising :) The item identified in this post will not act as a flame sensor. It is a proximity sensor which works by emitting its own IR illumination (...) (23 years ago, 23-Dec-02, to lugnet.robotics)
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| | Re: flame sensor
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(...) Vincent, I think I know of something that will fit what you want exactly. John Barnes ((URL) makes an InfraRed sensor that supposedly works over a range of 1-7 inches. Sensor info here: (URL) that helps, ~Mike (23 years ago, 23-Dec-02, to lugnet.robotics)
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| | Re: flame sensor
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I know folks use this sensor for the trinity fire fighting contest.... (URL) (23 years ago, 23-Dec-02, to lugnet.robotics)
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| | unique Identifer in RCX
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Is there a unique identifier hard coded into the RCX? I recall reading somewhere that the serial number printed on the side of the RCX could be called up using NQC or LegOS. I may be wrong I would like to use this number for data logging so I would (...) (23 years ago, 23-Dec-02, to lugnet.robotics)
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| | Re: flame sensor
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(...) Lego actually make an 'official' temperature sensor. I guess that in combination with the light sensor, you'd be able to detect a candle flame. The biggest problem may be how to get the temp sensor close enough to the flame to unambiguously (...) (23 years ago, 23-Dec-02, to lugnet.robotics)
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| | RE: flame sensor
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Look here (URL) Message----- From: news-gateway@lugnet.com [mailto:news-gateway...ugnet.com] On Behalf Of Vincent Grace Sent: Sunday, December 22, 2002 3:16 PM To: lego-robotics@crynwr.com Subject: flame sensor I am trying to build a sensor to (...) (23 years ago, 22-Dec-02, to lugnet.robotics)
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| | Re: flame sensor
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Just a quick thought, I was thinking that using both the light and temperature sensors might be the way to go. Let the robot search or seek the brightness of the flame with the light sensor. Then if the value is true, measure the heat with the temp (...) (23 years ago, 22-Dec-02, to lugnet.robotics)
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| | flame sensor
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I am trying to build a sensor to attach to the RCX that can sense a candle flame. I'll be attaching it to a robot that will use it to look for a candle, go to it and extinguish it. If any one has heard of such a sensor that's able to be interfaced (...) (23 years ago, 22-Dec-02, to lugnet.robotics)
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| | Re: Problems with the linux version
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Hi Reto! I just set it up two weeks ago, here is what I did (in general description): How to set up leJOS in Linux and use the USB Mindstorms Legotower: * get current CVS version because leJOS 2.0 does not support the USB Tower in Linux. Look at (...) (23 years ago, 22-Dec-02, to lugnet.robotics)
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| | Re: Robotics
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(...) That's exactly how I feel towards Frosty: (URL) (23 years ago, 21-Dec-02, to lugnet.robotics)
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| | Re: Robotics
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(...) Robots are "Your plastic pal who's fun to be with!" (Douglas Adams - H2G2) (...) It's all OK until their eyes glow red - then they insist on taking over the world and it all ends in tears. :-) ---...--- Steve Baker ---...--- HomeEmail: (...) (23 years ago, 21-Dec-02, to lugnet.robotics)
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| | Problems with the linux version
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Hi, I am painfully trying to set up the lejos2.0 on linux (SuSE8.0 and or Knoppix3.1) with an USB-ir-Tower. First I could not do the make as it says that the libirtower.so is missing. That is true. Instead I've found a irtower.dll file which (...) (23 years ago, 21-Dec-02, to lugnet.robotics)
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| | Re: Robotics
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Hello Scott, I'm guessing this is a grade school research project of some sort? Sounds like fun so sure I'll help: Uses of Robotics Almost everywhere - start defining what is robotics. Some good definitions can be found at: (URL) would define (...) (23 years ago, 21-Dec-02, to lugnet.robotics)
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| | Re: How can I get a Mindstorms Ultimate Accessories Kit??????
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I can get them here in Ottawa (unless someone has suddenly bought them all). Where are you? (...) (23 years ago, 21-Dec-02, to lugnet.robotics)
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| | How can I get a Mindstorms Ultimate Accessories Kit??????
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How come it's discontinued?? DAMMIT! I can't find it anywhere on bricklink or evilbay either... :-(((( That is seriously weakening my chances of wanting to buy a 2.0 RIS in january.... (23 years ago, 21-Dec-02, to lugnet.robotics)
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| | Merry XMas & Happy NY
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Merry Christmas and Happy New Year to all lugnet members let the NY2003 brings you a lots of new bricks paul pixel kleniewski ps: so early because i'll be offline during this time (23 years ago, 20-Dec-02, to lugnet.robotics, lugnet.technic)
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| | USB IR tower support in Lunix
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I have seen some past messages in this forum regarding the support for the USB IR tower in the Linux version of BrickOS. However, it seems that nothing have been added recently to the CVS tree at SourceForge. Is somebody working on this project (...) (23 years ago, 20-Dec-02, to lugnet.robotics.rcx.legos)
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| | Robot competitions at BricksWest
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In order to have enough time and space for the various robot (and RC) competitions I'm running at BricksWest, I would request that anyone who is considering entering let me know. This isn't a binding commitment that you'll bring a robot, or racer, (...) (23 years ago, 20-Dec-02, to lugnet.events.brickswest, lugnet.technic, lugnet.robotics)
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| | Announcing RCX Drag Racing Competition at BricksWest 2003
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In addition to the Off-Road RC racing competition, there will also be an RCX robot competition involving racing... drag racing. Below are the rules. -- David Schilling RCX Drag Racing Competition Official Rules ===...=== Objective: Competitors will (...) (23 years ago, 20-Dec-02, to lugnet.events.brickswest, lugnet.technic, lugnet.robotics)
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| | Announcing Off-Road RC Racing Competition at BricksWest 2003
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As promised, below are the rules for the Off-Road RC Racing competition to be held at BricksWest 2003. -- David Schilling Off-Road RC Racing Competition Official Rules ===...=== Objective: Before the competition, competitors will design and build an (...) (23 years ago, 20-Dec-02, to lugnet.events.brickswest, lugnet.technic, lugnet.robotics)
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| | Re: New Version of leJOS
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(...) (URL) (23 years ago, 20-Dec-02, to lugnet.robotics.rcx)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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I have observed a bit of sloppiness in the manufacture of the RCX's such that, in some cases, the IR diodes aren't mounted perfectly horizontally, they may be at an angle which will affect the apparent range. Opening the case and re-aligning the (...) (23 years ago, 20-Dec-02, to lugnet.robotics)
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| | Robotics
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For a paper I would like to talk about the uses and the pros and cons of robotics in the world. Any info would be helpful. Thanks in advance, Scott (23 years ago, 19-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) If you download the SDK you will also get some demo programs. They will run with VC++ and show how to get a video stream to a window and how to use the motion detection feature of the camera driver. The demos don't help much for Kylix/Linux (...) (23 years ago, 19-Dec-02, to lugnet.robotics)
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| | Looking for Robotic Discovery Set (#9735)
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Hello, I am looking for 2 sets of brand new Lego Robotic Dicovery Set (#9735) Please make me an offer if you have ONE or TWO sets. Email: huip@hkstar.com Thanks. Patrick (23 years ago, 19-Dec-02, to lugnet.robotics)
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| | Re: Contact-Me 2003
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Great shot Eric, just one thing, AOL??? I mean, AOL???? The mechs are awesome, but A.O.L? You're not selling out I hope. Of course, I suppose a mech that automatically installed AOL on any computer it got near would be the most fearsome mech in the (...) (23 years ago, 19-Dec-02, to lugnet.build.mecha, lugnet.people, lugnet.org.us.gardenslug, lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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Sorry for the late reply ... consumer still cameras (even cheap ones) have auto-focus capability, so the technology has to be within reach of the RCX. I did a search on Google and found the following definitions: Active auto-focus is where the (...) (23 years ago, 19-Dec-02, to lugnet.robotics)
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| | Contact-Me 2003
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I got your Giant Robots right here! (URL) me 2003 mylegomaster@AOL.com www.mylegomaster.com Legomaster (23 years ago, 19-Dec-02, to lugnet.build.mecha, lugnet.people, lugnet.org.us.gardenslug, lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) That would sure help make the image processing faster, but techniques do exist for image registration (e.g. (URL) This is often required for MRI or electron microsope images since the movement of the apparatus affects the image scale, skew and (...) (23 years ago, 19-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) from one end to another taking pictures as you go, and selecting the best parts of each, you'd end up with better-than-perfect focussing. I guess you'd want to be careful to mount the camera very rigidly so it doesn't wobble as you drive the (...) (23 years ago, 19-Dec-02, to lugnet.robotics)
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| | Something unusual(?)
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Dear all, Here is some light entertainment: (URL) aware that the video file linked by the image is a 6 mb Divx 4 AVI) I'll post some notes on how I made it soon - for now enjoy the movie! (23 years ago, 18-Dec-02, to lugnet.animation, lugnet.space, lugnet.technic, lugnet.robotics, lugnet.build, lugnet.starwars, lugnet.cad)
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| | Re: Working motorized focus for Vision Command
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But how to I "weave" the SDK and the algorithms IN VC++? I am only wondering if this idea of an autofocusing lego cam is feasible. One day I may learn enough VC++ to be able to acomplish this project :-) I'm glad to know there is hope! Timothy (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) Timothy, One source of inspiration for the focusing algorithm is to look at codes that expand the depth of focus by stitching together the in-focus portions of multiple images. This is used in microscopy quite a bit. The software has to be (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) No problem. The VC camera is a repacked Logitech. You can get a free quickcam SDK from the Logitech homepage. With that, you can program the camera under Windows. If you want to use Linux, things get a bit more complicated. You could use (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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I have no idea how to access the camera from a programming language, nor do I have any experience in raw vision proccessing. Do you know how to do any of these previously meantioned? Timothy (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) Yes - that'll also make the algorithm run faster. (...) I'm sure it's possible. What I'm not sure about is whether the kind of naive algorithm that I could come up with after just a few minutes thought would be effective. It might take some (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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I have not performed any tests, but if you go in configuration panel, you will see that the USB tower can't be put in long range mode if it is placed behind a passive (non powered) USB hub. That may also be the case for low power laptop usb ports. (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Lego® 9V Technic Motors compared characteristics
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Hi Gaurav, (...) ;o) (...) I don't own these motors... but I have a friend who has this set, if I can get him to extract the motors from the car I'll post an update... Philo www.philohome.com (23 years ago, 18-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: Working motorized focus for Vision Command
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Thanks for replying! I was thinking of the same procedure. But to help with the varried depth problem, a small part of the viewed area could be selected to be the focusing point. So overall, it must be possible, right? Timothy (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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|
I have one of each RCX (1.0, 1.5 , 2.0) and have tested the signals using a palm app called IRMonitor with little or no difference between the three. This is by no means a "labratory test". Haveyou noticed this with more than one brick? For the (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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(...) Well, I'm not an expert - but I imagine it should be possible to produce a measure of how sharp the image is. For example by adding up all the differences between one pixel and it's neighbours. In a sharp image, you'd expect a lot of nice high (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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(...) Actually I've noticed that the 2.0 brick's IR capabilities don't seem to be as strong as the 1.0/1.5 bricks. I don't know why this would be, if something got changed in the hardware? It isn't an issue for most things, but if you want bricks (...) (23 years ago, 18-Dec-02, to lugnet.robotics)
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| | Re: USB IR Tower Linux
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(...) There's a driver project at (URL) also P C Chan did a patch for BrickOS to support it (URL) (I havent tried either of these) Regards ROSCO (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | USB IR Tower Linux
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Anyone got the USB IR tower shipped in 2.0 to connect to a linux box? If not, are there any specs available so that I can write one? Thanks, Brian Palmer (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | RE: 8472
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Take at look at (URL) (If you didn't already) Greetings, Bram Nauta [bram.nauta@home.nl] -----Oorspronkelijk bericht----- Van: Laszlo Meszaros (ETH) [mailto:Laszlo.Mesza...icsson.se] Verzonden: dinsdag 17 december 2002 21:47 Aan: (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Re: Lego® 9V Technic Motors compared characteristics
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(...) This is very informative indeed and excellently designed; I learned quite a bit from the article. thanks and great work. BTW do you happen to know how the new 8475 motors compare here? (from what I have heard, they are more powerful than (...) (23 years ago, 17-Dec-02, to lugnet.robotics, lugnet.technic)
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| |
| | Re: Last Call For BricksWest 2003 Presenters/Sessions
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Is anyone presenting brickOS at BricksWest? Their last call states that they are heavy on Mindstorms but the Brickwest website, last updated in October?, seems to only indicate several talks on RoboLab. It would be great to have someone present. Or (...) (23 years ago, 17-Dec-02, to lugnet.robotics, lugnet.events.brickswest)
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| | Re: linker segmentation fault
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(...) Workaround attached. Brickos maintainers: Any comments? Maybe put something vaguely like it into CVS? Max. (23 years ago, 17-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Autonomous RCX Racing - formerly Nascar style racing
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These are exellent ideas, I was originally trying to support 20+ teams like a tournament. only a few (eight is plenty)cars would be on the track at one time. Now I realize that would be better handeled by a database. I like the idea of the vision (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Re: Autonomous RCX Racing - formerly Nascar style racing
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(...) Random thoughts: The way I read it, you can only notify of position down to 9th place. I guess you could treat 9th place as "9th or worse place". Also, you can only send a count of up to 9 laps, limiting either the race length or the error (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | RE: Autonomous RCX Racing - formerly Nascar style racing
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|
<SNIP> (...) Perhaps 2 bits for race status, 3 bits for car #, and 3 bits for position. That gives 8 cars and 8 positions plus allows the ability to tell a car "finished", "keep racing", or "caution": MSB 7 6 5 4 3 2 1 0 LSB s s c c c p p p Message (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Re: Working motorized focus for Vision Command
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|
anyone?? (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | linker segmentation fault
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|
I'm running Red Hat Linux 8.0 (gcc 3.2 and binutils 2.13). Whe I try to compile the demos that come with brickOS 0.2.6.09, using binutils 2.12.91 for the cross-linker and gcc 3.2.1 as cross-compiler, the linker crashes. Here is the output of the (...) (23 years ago, 17-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Autonomous RCX Racing - formerly Nascar style racing
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(...) Here is a link to Gus Janson's SteerBot ((URL) which I think you will find has great maneuverability as well as a tight turning radius (~6"). I have replicated it several times in the past 2 months for my group's line following event. After (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Re: Autonomous RCX Racing - formerly Nascar style racing
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(...) What about 5?! (...) What message would the 11th place car get? Right off the bat, I'd say 23 cars is too many. It won't leave any room to move around, so they'll spend all their time bumping each other. I'd guess 4 or 6 would be about right. (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Re: Lego® 9V Technic Motors compared characteristics
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(...) Someday I'm going to update my links page and you're going to be in it! Best regards, /Tobbe (URL) SPAM when e-mailing) (23 years ago, 17-Dec-02, to lugnet.robotics, lugnet.technic)
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| |
| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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(...) The only difference is that the 1.0 brick has an external power connector so you can save batteries while testing by plugging in an external mains adaptor. In all other respects, the three bricks are identical. (...) Yes. My 1.0 brick runs 2.0 (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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To add to Stephane question: Are there any hardware differences between between the 2.0, 1.5, and 1.0 versions of the RCX brick? Has anyone noticed any performance differences? Are all programmable with the included RIS 2.0 software? Roy Nelson (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Autonomous RCX Racing - formerly Nascar style racing
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|
After some intense fiddeling around I have created a couple working vehicles or autonimous racers based on the discussions a previous post. The vehicles handle like traditional race cars without the ackerman style steering by having a motor powering (...) (23 years ago, 17-Dec-02, to lugnet.robotics)
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| | Vision Command
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Hello, For anyone interested... I have two spare Vision Command Constructopedias and CD's (English). If anyone is willing to part with the software/documentation from the Steven Spielberg Movie Studio set, please email me. Also, I'd like to expand (...) (23 years ago, 16-Dec-02, to lugnet.robotics)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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|
(...) Dunno - but the overriding thing that should determine which one you'd want is that the 1.5 RIS comes with a SERIAL PORT (RS-232) interface to the infra-red tower - the 2.0 set has a more modern USB interface. The USB version is better - but (...) (23 years ago, 16-Dec-02, to lugnet.robotics)
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| | RE: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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|
The major differences between RIS 1.5 and 2.0 are the RIS software and the IR Tower. The software upgrade from RIS 1.5 to 2.0 is $19.99 (#3805) from LEGO's website. A USB IR Tower can be purchased from pldstore.com (W979783) for $29.00. There was no (...) (23 years ago, 16-Dec-02, to lugnet.robotics)
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| | Re: BrickOS Threading...
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|
(...) To tell you the truth, I'm not exactly sure how the BrickOS PWM works, but I do know the standard RCX PWM simply switches the motors between ON and FLOAT, which will not slow the motor down, when it switches from a high power, to a lower (...) (23 years ago, 16-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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(...) Almost identical... parts differences: RIS 2.0 has an USB infrared tower, RIS 1.5 a serial one. RIS 2.0 also has an "optic fiber" used to program Micro Scout. (...) No, but RIS 2.0 has instructions for 6 more constructions on CD. Philo (...) (23 years ago, 16-Dec-02, to lugnet.robotics)
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| | Tempted in buying my first Mindstorms invention kit - 1.5 vs 2.0 ?
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|
Currently debating in my head whether of these versions is the best to buy. I've checked the inventory with Peeron, all RIS kits appear more or less identical in their supply of parts. Does 1.5 come with ANYTHING that isn't included in 2.0 ? I would (...) (23 years ago, 16-Dec-02, to lugnet.robotics)
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| | Re: sys_time (long post)
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|
Only a suggestion, In any processor architecture (with or without disabling or recursive interrupts) when I need to read timers with more than 1 single instruction I do the following: Read the timer (both low and high value) until I get 2 times the (...) (23 years ago, 16-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Working motorized focus for Vision Command
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|
This may be a stupid question, but could the vision command be made to "autofocus" given special code? Timothy (...) (23 years ago, 15-Dec-02, to lugnet.robotics)
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| | Re: Lego® 9V Technic Motors compared characteristics
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|
Nice page, Philippe! Thanks for all the work. Mark "Philippe Hurbain" <philohome@free.fr> wrote in message news:H765Fr.ME9@lugnet.com... (...) (23 years ago, 15-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: Lego® 9V Technic Motors compared characteristics
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|
Just corrected a cut and paste error in speed/torque table of 43362, and (...) (23 years ago, 15-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: Lego® 9V Technic Motors compared characteristics
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UR great Philo!!! (23 years ago, 15-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: LegoX Technic Motor (43362) internals
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(...) It's 6.11125 meters. (...) Yes - it's hard to tell because the difference in speeds will depend on the load on the motors - loading them either more or less would alter their characteristics relative to each other. (...) Yes - I think so. (...) (23 years ago, 15-Dec-02, to lugnet.robotics)
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| | Lego® 9V Technic Motors compared characteristics
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|
Hi everybody, I have completed a 9V technic motors comparison page. See it at (URL) ! Philo www.philohome.com (23 years ago, 15-Dec-02, to lugnet.announce, lugnet.robotics, lugnet.technic) !!
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| | Re: Demo of Lego Studio?
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(...) Yes, it's possible. At least it WAS possible 6 months ago in the U.S. I had similar idea and called Lego consumer service. They sent informatin back, telling that you can order Lego studios sofrware, it costs approx. $30.00 Try to contact your (...) (23 years ago, 15-Dec-02, to lugnet.robotics.vc)
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| | Re: Lego® Technic Motor (43362) internals
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(...) Ah! (...) My friend wont bother much since the boxes are for education at hiw workplace. I conducted a quick test with one 71427-002 and one 43362 (with new internals), put them back to back with a 8462 wheel on each axel and a 9V small (...) (23 years ago, 15-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Re: Lego® Technic Motor (43362) internals
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Hi Tobbe, My guess is that your friend actually got one 43362 and one 71427, the latter beeing enclosed in a 43362 case. If you look at 43362 enclosure photo ((URL) you see that there are 4 plastic pins in corners that are used to secure 71427 core (...) (23 years ago, 15-Dec-02, to lugnet.robotics, lugnet.technic)
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| | RE: Shuffle bot
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From watching the son of whyachi and looking at the specs page i think: 1. the concept that you are looking at is different from the actual locomotion of SOW 2. it isn't going ot be easy to reproduce this in Lego 3. I found something else to work on (...) (23 years ago, 14-Dec-02, to lugnet.robotics)
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| | Re: Lego® Technic Motor (43362) internals
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(...) and it contains two 43362 motors. These are not the same: (URL) one without the "backholes" spins like the older geared motor, for aprox six seconds given a twist on the shaft, the other one for but one second... The mystery deepens... (...) (23 years ago, 14-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Pre-Announcing Off-Road RC Racing Competition at BricksWest 2003
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I am going to be holding an Off-Road RC racing competition at BricksWest 2003. It will still take me a few days to get the rules together, but I thought that with the $99 8475's available at Amazon, (see (URL) I'd give people the heads up, so that (...) (23 years ago, 14-Dec-02, to lugnet.events.brickswest, lugnet.technic, lugnet.robotics)
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| | Re: Shufflebot Concept
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The problem with that is you'd have to put the mechanisms together by putting axles over the first setup, which begins looking ugly. This is how I achieved the first walking part: 1. Geared down motor going to two output axles. 2. Put two pulleys on (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: Shufflebot Concept
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(...) Well, if you can do one, how about if you put two of these right next to each other? I'm sure you'd want one to be a mirror of the other, to put them closer together... I don't know if three would work as well. Maybe you could have one that's (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: sys_time (long post)
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(...) I went back and read... I was missing something apparently... Note to self... do not skim. -Kekoa (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: sys_time (long post)
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Does the H8 let an interrupt interrupt an interrupt? (Or at least the interrupts that matter in this case?) You two might want to check on that. It would seem the code is safe if the answer to the first question is no... ? Maybe I'm missing (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Shufflebot Concept
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Is there any way to make a shuffling (stompbot) drive where three shufflers are used on each side. When one goes up, the other two go down, and when those two go up the other one goes down. This is used to provide locomotion. The best example of (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | RE: Firmware download troubles
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The size of the firmware isn't going past the 0xcc00 boundary, is it? The firmware in the RCX only does a sum on the bytes up to 0xCBFF in the downloaded firmware, as far as I recall... Cheers, Ralph (23 years ago, 13-Dec-02, to lugnet.robotics.rcx)
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| | Re: BrickOS Threading...
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Joe, (...) Maybe a special kernel build for testing purposes that increments the lower sys_time word by 0x4000 instead of 1. This will greatly increase the opportunity for this glitch to occur (from once every 65 seconds to once every 4ms.) You (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Hammer Help
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Thanks for the response. I've decided to stay away from string on the robot as string can get easily entangled, especially if battling another robot. I took a break from trying a design using gears and differentials - I was getting really (...) (23 years ago, 13-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: Hammer Help
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In the prototype I used string and winch to set the hammer. I've decided not to use it on the robot - string can too easily get caught and entangled in stuff, especially if it goes up agianst another robot. On the prototype it works surprisingly (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: Firmware download troubles
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(...) The problem he's describing, if it's the same one I have, is independant of the position, direction, and power level of the tower. It seems to have something to do with BrixCC itself. The only thing I find puzzling is that Matt (the other Matt (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx)
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| | Re: BrickOS Threading...
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Steve, I checked in some changes this morning (into cvs) to put the motor controller back at the 1 ms interval. However, I want to complete the get_sys_time() updates that Mark Riley has proposed; so that can be tested as well. I am not sure when (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Firmware download troubles
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(...) It's funny that you should bring this up - I've had exactly the same problems with several RCX's and downloading firmware from BrixCC. The only solution I've been able to find is to download the firmware using the RIS2.0 software and then (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx)
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| | Re: sys_time (long post)
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(...) It turns out that the nature of the glitch depends on the order you read the upper and lower 16-bits of sys_time. If the compiler generates code that reads the high word first (which it seems to do), then your example will work. However, if (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Fw: [handyboard] xmas songs
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----- Original Message ----- From: <x01101001@yahoo.com> To: <handyboard@yahoogroups.com> Sent: Friday, December 13, 2002 8:19 PM Subject: [handyboard] xmas songs (...) (23 years ago, 13-Dec-02, to lugnet.robotics.handyboard)
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| | Re: Working motorized focus for Vision Command
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I was wondering if anybody would improve the power focus for the Lego camera. You have accomplished this very well. I especially like your tilt drive. Sticking that 40 tooth gear without glue is super. Congratulations! Bob Fay (URL) Haye" (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: BrickOS Threading...
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(...) In trying to balance an RCX on two wheels, every little bit makes a difference. I didn't think it would matter quite that much, but my robot really shakes more with the new version. Thanks for the work, Steve (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Hammer Help
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winding and unwinding string seems to be to slow if i understand it good so my idea is here: use two wheels (pulleys) especiali as big as you can put into your design they should be with flat surface so it meand they should be from old sets like: (...) (23 years ago, 13-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Hammer Help
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Roy I thought about designing such a thing a while ago. My decision was that I'd make something like a Roman ballista. I'd wind up a string on a winch to cock the hammer then unwind the string all the way back again. The catch would be released by (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | setjmp/longjmp for brickOS
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Hi all, I am currently attending to a lecture in real time system on my university and we were assigned the homework to do exception handling in C on the RCX using setjmp and longjmp. Of course those are not available in brickOS so that task (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: BrickOS Threading...
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(...) <snip> (...) Steve, Yes, infact I had tested a couple different applications with the motor controller being called every 1 ms and the same ones with a 2 ms interval. I didn't see a difference with those applications, but did recognize the (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: BrickOS Threading...
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(...) ... (...) This change seem to improve things. Can I change it back to the way it was before? Thanks Steve (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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