 | | Re: RIS 1.5 kit
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Something worth checking may be "Dick Smith Electronics" down here in little old New Zealand (please remove the line wrap): (URL) if they ship offshore, but they're doing RIS1.5 for NZ$399. Our crap currency only buys US$0.40, so that works out at (...) (25 years ago, 19-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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(...) Oh, and I forgot to mention, you won't get rotation out of a PS/2 interface. It does (primarily) +x, +y, and however many button events. (25 years ago, 19-Nov-00, to lugnet.robotics)
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| | Re: web-legOS back online
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Shawn: What are the technical limitations associated with doing this with legOS 0.2.x? I'd love to put something similar (but more up to date) on the legOS.sourceforge.net site (or, more likely, tieguy.org/legos due to quotas at sourceforge) but I'm (...) (25 years ago, 19-Nov-00, to lugnet.robotics)
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| | web-legOS back online
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Due to a server rebuild, the web-legOS compiler at dwarfrune.com has been unavailable for some time now. I'm happy to announce that it's finally back on line. Thanks to all of you for your patience. <A HREF="(2 URLs) -SMQ Shawn Menninga (...) (25 years ago, 19-Nov-00, to lugnet.robotics)
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| | RE: AI in RCX
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This is the first time I have posted and I don't look at my mail very often so I may be late in the conversation, however: Andy, thank you for reminding all of us that there is nothing impossible! Road blocks do not exist in my world nor should they (...) (25 years ago, 19-Nov-00, to lugnet.robotics)
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| | RIS 1.5 kit
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I am looking for the lowest priced RIS 1.5 kit. I was wondering if anyone knew of someplace online that is selling it for cheaper than $200. I have heard that it sells for around $150 or $160 at some site, but do not know where. Any help is (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | RE: FW: Another DIY sensor
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Steve I would hope that better mice would have better encoders, but I don't know, I have a Logitech track ball I think I will take it apart and look at it to see how much difference there is.... The guy who suggested duct taping a mouse to the (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | Re: any idea if radar can be used with the rcx?
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Radar tends to overkill for most Lego applications. (Large and expensive) I have a couple of infra-red based detectors on the web page below, that are built into a standard 2x4 bump brick. Maximum range is about two feet. (URL) - pete. (...) -- Pete (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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I forgot to mention that two optical mice are needed for accurate navigation. With only one sensor you cannot track if the robot turns. I think it’s a good idea to buy a optical mouse because I haven’t seen any suppliers carrying the HD2000 chip. If (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | Re: any idea if radar can be used with the rcx?
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(URL) Too see the store is 100 times more expanse as the web site. Happy surfing... Fred (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | Tracks.
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Just a swift note: The 5934 "Track Master" from the adventurers' range has some nice *small* rubber tracks. They are about half the width and 2/3rds the length of the RIS tracks...which I found was very useful for making a *small* tracked robot. (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | FW: Another DIY sensor
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I was throwing a mouse away the other day and instead took it apart to see what makes it tick, well, it's a perfect rotation sensor. I think it will be almost twice as accurate as the lego rotation sensor, more as this project develops. I think it (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | Re: any idea if radar can be used with the rcx?
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I work at a Mercedes-Benz dealership and checked into the pricing of the radar in the new 2000 S-Class... Retail, $4300!! Just for the control unit, all the other gizmos needed total to about $1500. Guess that puts radar cost into perspective. Might (...) (25 years ago, 18-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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(...) All optical mice use the HDNS-2000 (short: HD 2000) chip from Agilent Technologies. There are two output modes: the rs232 output and the quadrature output mode. The quadrature output gives the Delta X and Delta Y values (how much the x,y (...) (25 years ago, 17-Nov-00, to lugnet.robotics)
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| | Re: Sets with worm gear box?
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I just tried to send this reply directly to pavogel@pacbell.net and my message is returned as undeliverable. Is this some kind of "special" email address? So here is my answer, to the more general audience, please forgive; The two odd pieces, in (...) (25 years ago, 17-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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(...) Those cameras have a small, low-resolution CCD in them, and they take snapshots of the mousing surface and compare them to detect the quantity of motion. If you were going to use one of those mice your best bet would be to put together a (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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(...) Did you consider buying a $5 computer mouse and gutting it? That will give you not one but TWO slotted disks and TWO dual optical detectors. It's hard to imagine another solution for $2.50 per sensor! IIRC, most cheap mice are ~200 clicks per (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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The optical mice are still $50. I bought one and ended up taking it back, didn't work so well. But it definitely looked cool. Would probably make a good sensor though I don't know what kind of values it sends out... (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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(...) How about (URL) you filter out the marketing-speak it would appear that the optical sensor is a combination digital camera and signal processor. Dunno what the chances are of getting any sort of intelligle output other than +/- x and y is. (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | A technic elevator
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I have updated my Lego page with my new own creation : a Lego elevator. (URL) Klein A Mindstorms fan. (25 years ago, 17-Nov-00, to lugnet.robotics, lugnet.technic)
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| | Re: Clarification of access control
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(...) I forgot to show that resources get released, the functionality is more like this: try { grabResource(X); ...body... releaseResource(X); } catch (ResourceLostException e) { } Dave (25 years ago, 17-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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Does the ratio of the disk track diameter and the seperation between the interuptors allow you get 90 degrees (optical) seperation ? IE could you get quadrature off of it ? BTW, Please post pictures : ) Thanks, -JSM (25 years ago, 17-Nov-00, to lugnet.robotics)
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| | BrickBots.Com is launched - New Robotics Contest with Prize
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I have received so much good information by lurking in the LUGNET community, I am finally giving something back. I am pleased to announce both the launch of BrickBots.Com ( (URL) ) and the start of our first contest, the Aluminum Can Stacking (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: any idea if radar can be used with the rcx?
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You can get pretty good proximity detection using the built in IR port to send (arbitrary) messages out and simultaneously sampling with the stock light sensor to pick up IR returns. Proximity detection out to about 10 inches is possible. Search the (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Clarification of access control
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If a task loses its resources (due to an equal or higher priority task acquiring them), then control leaves the body of the acquire statement. If there is a "catch" block following the acquire, then the catch block is executed, otherwise control (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: any idea if radar can be used with the rcx?
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(...) The RCX doesn't support radar, but the Handy Board with Expansion Board supports the Polaroid Sonar unit... here is a thread on a recent discussion here on it... (URL) Handy Board is essentially the RCX+++, but it does not come in a Lego (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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Umm. (...) No I didn't! My laptop has a glide point thingy so I don't have box full of dead mice! . But I should investigate! Thanks for the idea. (...) That reminds me. A while ago now, someone here suggested trying out the guts of one of those (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: The Giant Wheelbot (aka 'sphere rat')
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(...) Who was it that built the 'sewer rat' ( a robot that fitted in a pipe, with 4 sets of wheels contacting the walls of the pipe)? It shouldn't be insanely hard to modify into a 'sphere rat'! Did the original sewer rat use synchro drives or fixed (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: The Giant Wheelbot
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(...) Who was it that built the 'sewer rat' ( a robot that fitted in a pipe, with 4 sets of wheels contacting the walls of the pipe)? It shouldn't be insanely hard to modify into a 'sphere rat'! Did the original sewer rat use synchro drives or fixed (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: The Giant Wheelbot
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(...) Stick it in one of those "hamster balls". They make bigger ones for rats and ferrets. --- J Austin David austindavid.com austin@gtf.org Life is hard. It's harder if you use NT. (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Another DIY sensor
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(...) Then: (...) Now you tell me!!!! Just after I finished implementing a set of cheap and cheerful nqc fixed point transcendental functions based on 100 RCX degrees per rev! JB (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: The Giant Wheelbot
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This reminds me of something I was considering building about a year ago, though not out of Lego. (I consider building a lot of things, but nothing ever gets built) I had the idea to build a remote controlled robot completely contained in a sphere. (...) (25 years ago, 16-Nov-00, to lugnet.technic, lugnet.robotics)
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| | Re: Another DIY sensor
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(...) Use RAW mode. Then you get 2500 to 0 (I think it was) Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: any idea if radar can be used with the rcx?
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(...) Not "radar," but you can couple lights to the drive motors, aim them out front, and use the light-sensor. It will see the reflected light near an object, and react accordingly. On a scout, I make it "avoid light." The thing will get ~ 4 inches (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Clarification of access control
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I'm curently reading Extreme Mindstorms. In listing 4.2 (see below) the seek task acquires the user defined resource and then enters an inner infinite loop looking for a target. It appears to me that if the seek task losing ownership of the user (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | any idea if radar can be used with the rcx?
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hi all Any one has used radar with the rcx to sense objects in front ?? does any one have an idea where i can get small radar sensing devices? in the Mercedees benz S class it uses radar to sense an car or ostacle in front , Dr Patel (25 years ago, 17-Nov-00, to lugnet.robotics)
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| | Another DIY sensor
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My continuing journey into the world of DIY RCX sensors has lead me to a home made rotation sensor which may be of interest. Since the RCX light sensor reports values in the range 0 - 100 and my compass sensors are thus constrained to report 0 - 360 (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Turning a robot 90 degrees
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Hi all, we build a synchrodrive (without turntables) that has a freedom of about 100 degree. We used it in an orthogonal labyrint and it worked well. I'll post a message when our new hompage is available. There will be a detailed howto on this page (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Another Technic Creation
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(...) Easily - in fact my lego collection is very modest, and positively diminutive compared with some of the pictures and lists of other's collections online. The crane was built mainly from the 8480 Space Shuttle, the 8448 Supercar, and the 8266 (...) (25 years ago, 16-Nov-00, to lugnet.robotics)
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| | Re: Any one has 2 rcx's?? can a irda prot in a window based machine help in corol of the RCX?
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(...) No, IRDA is incompatible with the RCX. As another possibility for communication you might want to look at the LNP protocol of Legos. Jürgen (25 years ago, 16-Nov-00, to lugnet.robotics)
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