 | | Re: I am an Idiot (was Pneumatics Are Back!)
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The $59.99 price is a newer, discouted price on the Droid DK; it originally sold for $99.99, just like the Darkside DK. "Jeffrey Hazen" <jeffrey.hazen@northmill.net> wrote in message news:01C01A73.0EA01F...thmill1... (...) for (...) (25 years ago, 9-Sep-00, to lugnet.robotics)
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| | Re: I am an Idiot (was Pneumatics Are Back!)
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(...) What about the new Silver Champion (#8458) with 1,412 pieces at $169.99 compared to the Super Street Sensation (#8448) with 1,408 parts at $129.99? It cost them $40 for four extra elements..? I'm a twenty-five year old LEGO fan. I've spent (...) (25 years ago, 9-Sep-00, to lugnet.robotics)
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| | RE: I am an Idiot (was Pneumatics Are Back!)
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What I found interesting in the new S@H catalog is the price difference between the (now older) Droid Developer Kit ( US$ 59.99 @ 652 pieces) and the newer Darkside Developer Kit ( US$ 99.99 @ 578 pieces). Same micro scout, different color, fewer (...) (25 years ago, 9-Sep-00, to lugnet.robotics)
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| | Is this a pneu idea?
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I have decided to give my mobile robot some serious alerting power by modifying a truck air horn for use with the lego pneumatics. I have a picture of the modified horn here: (...) compressor and a tank, and it's sure to clear my bot a path. Now I (...) (25 years ago, 9-Sep-00, to lugnet.robotics)
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| | Re: I am an Idiot (was Pneumatics Are Back!)
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I was wondering about this... Now that I see the parts pack, I can't help but think that this is NOT a pneumatics parts kit. This is a collection of parts that happens to have some pneumatics in it. This is a far cry from bulk pneumatic parts, Brad. (...) (25 years ago, 9-Sep-00, to lugnet.robotics)
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| | Re: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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(...) Now we are talking the BULK discussions. They did this in the train area... About Train windows and whatnot... Goto to the lugnet.legodirect (or something like that) and put in your word. But with our luck they would sell two air tanks for $30 (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | Re: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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(...) Buy one of them new packs. That's got 1 of everything. Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | RE: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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Some more thoughts on this... I recently talked to Lego customer service in Germany about single parts ordering and they said they´d do it for special purposes. But you have to pay a premium of about .25 to .5 $ per piece for the manual handling. As (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | RE: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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But what if I don't want or need pumps and blue tanks this month? And how many months will I wait till my favourite parts are featured? Why not if all people in this group go and think of what they want and make a wish list? For instance, I can make (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | RE: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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All this is a very good idea! Yesterday I wanted to stock up on all single pumps and pistons that I knew a store in the city had on stock, well, had is the key word... :( (...) Another small bit: They would not have to spend much on package design (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | Re: 1:10 Gear motors cheap(er)
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(...) I bought several sets - just for the motors - they also have a strange gearbox part that might come in useful for mounting motors in unusual places. ZNAPS can be found in rather battered boxes in just about every Toy'R'Us outlet in the (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | 1:10 Gear motors cheap(er)
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I was just in my local Toys'r'us and they have the Lego Znap #3552 set marked down to $9.97. It has: 1 1:10 mindstorms motor - #5225 (Pitsco $16.25) 1 small battery box - #???? 1 short wire They also have a larger Znap set marked down to $14.97 (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | RE: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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Here are some ideas (inspired by a model railroad club I know about but am not a member of). Some of the ones toward the end are more brainstorms than a thought-through plan. Take 'em for what they're worth. Acronyms used: AFOL = Adult Fan(s) of (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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>The problem is that they 'salt' the kits with parts that you'll ever only >need one or two of. Take the Hand Air pump. How many of them are you going >to need? My point exactly! But when I suggested that an organization like lugnet take on the (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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(...) The problem wouldn't be so bad if I had to buy $20 worth of Air Tanks. Hell, I'd buy 5 sets tomorrow. The problem is that they 'salt' the kits with parts that you'll ever only need one or two of. Take the Hand Air pump. How many of them are (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | Re: I am an Idiot (was Pneumatics Are Back!)
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(...) I agree there. When Lego discontinued the pneumatics I ran out and bought up as many of the large pistons as I could... Now, of course, I'm short about 20 of the valves with no cheap way to get more. heh. At $45 CDN it's **VERY** costly. But (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | Re: I am an Idiot (was Pneumatics Are Back!)
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(...) Actually, I'm tackling that particular problem right now. I don't claim it's elegant, but I'm using the pneumatic valves interconnected with a robot arm in such a way that each time the arm goes up, valve A changes position. Then when it goes (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | RE: Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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Great ideas. Maybe the LUGNET collective is someplace to begin. You can clearly see the marketing behind the pieces in the Star Wars set minifigs. Want Princess Leia or C-3PO? Buy the Millennium Falcon for $100 ... Want Padme? Buy the giant Pod Race (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Lego bulk (was :I am an Idiot (was Pneumatics Are Back!) )
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I suspect that their idea of bulk and ours is very different. They need to grab some mimimum $$$ per purchase to even make it worthwhile answering the phone. I suspect that figure is in the area of $20. So selling individual pieces between $1 - $4 (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | RE: I am an Idiot (was Pneumatics Are Back!)
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I agree on both points--the bulk and the pneumatics set availability--but this is still progress over a year ago. There were frantic messages posted not long ago that pneumatics might be going away for good ... so it's nice to see them making a (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: I am an Idiot (was Pneumatics Are Back!)
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(...) It's very nice that we can now get the air tanks. But it's bittering that we must now pay a fortune for the entire 'kit' if we only want a few bits... LEGO's idea of BULK seems grossly different from others. Dean -- Coin-Op's For Sale!: (URL) (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | RE: I am an Idiot (was Pneumatics Are Back!)
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I did wonder if this was the case Thanks Jarec (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: I am an Idiot (was Pneumatics Are Back!)
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The air hoses shipped with the set are long--and can be cut to whatever (and/or quantity) size the user desires. The catalog/image doesn't specify how long they are, though--but the pneumatics I've seen in sets are shipped the same way, and you cut (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | RE: I am an Idiot (was Pneumatics Are Back!)
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Is it my eyes or does the picture of the robot arm built with the Lego pneumatics set use more air pipes than the set actually includes. The three shown on the components list seems a bit lacking. Jarec (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | I am an Idiot (was Pneumatics Are Back!)
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As I was putting up the rest of the scans from the new Technic "Power Packs," guess which one I inadvertently deleted--of course--the pneumatics set. The images are now up at (URL) . Doug Wilcox Senior Web Developer iMcKesson Provider Solutions (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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(...) LEGO (...) Hi Ben It seems that the Lego IR sensor is like a sport car: when you think about power you never have enough. Me and Giulio Ferrari made somethin gworking using a lot (28+6) of led to obtain results. When you think you have enough (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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(...) I tried to build something like this. I was just trying to make a film canister into a beacon (even if the LEDs had to be external). I was using high-output IR LEDs powered by small lithium watch/camera batteries. What I discovered was that no (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: How good is 'toy grade' Lego?
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(...) We´re using Lego Basics sets here in the lab (as moulds for ceramic slip casting in case anyone is interested... ;) ), the cheapest way to get parts here that I know and we get about 1 or 2 10ths of a milimeter variaton in lengths of our (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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Are those PURPLE pieces in the 5222??? You mean I won't have to use MegaBlocks or spray paint??? (quickly putting on flameproof suit) Way to go LEGO... now how 'bout something bigger than the 1x2 plates :) Dave (...) (25 years ago, 7-Sep-00, to lugnet.robotics)
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| | Re: How good is 'toy grade' Lego?
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(...) If I remember correctly the big blue tubs do not have the same quantity of black as with other colours. I think black and green share what each of the other colours have... The Bulk on S@H isn't very bulk... It would cost a fortune to buy from (...) (25 years ago, 8-Sep-00, to lugnet.robotics)
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| | Re: How good is 'toy grade' Lego?
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(...) They're all the same great quality as long as you stick to real Lego. (This isn't just prejudice against the clone brands -- they really don't measure up.) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | How good is 'toy grade' Lego?
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I am about to buy some bulk packages of black bricks. But for less money I could go to Toys-R-Us or elsewhere and get a bucket of *all kinds* of bricks. So my question is: Are those in the 'bucket' as good a quality, or will my robots fall apart due (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: ping-pong popper
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(...) If you have one of those Klutz LEGO Creations books handy, they show a working ping-pong popper in the second half of the book. That should give you some ideas; I wouldn't lift the entire design for risk of plagiarism. You'll definitely need (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | RE: Serial-IR Tower Cable
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Oooops.....add to that pin 7 to pin 8, and pin 8 to pin 7 (thanks JB) Jeffrey Hazen North Mill Technology jeffrey.hazen@northmill.net -----Original Message----- From: Jeffrey Hazen [SMTP:jeffrey.hazen@...hmill.net] Sent: Wednesday, September 06, (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | RE: Serial-IR Tower Cable
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Just happened to be playing with my DVM at work...... 9 pin female to 9 pin female 2.........3 3.........2 4.........4 5.........5 none of the other pins seem to be connected. Jeff Jeffrey Hazen North Mill Technology jeffrey.hazen@northmill.net (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Mind Control source code available
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Remember Mind Control from the good old days, way before the turn of the century? (If you don't: it's a Visual Basic program which interprets (most) RCX code and sends it to the RCX; along with some real-time control functions). Since NQC and other (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Serial-IR Tower Cable
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Is the cable that connects the IR tower to the PC just a standard 9-pin to 9-pin serial, or is it a nullmodem? (I have two towers but only one cable after a recent Lego collection acquisition, and would like to get a second one--but I already have (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | CD changer in a dutch magazine
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A dutch magazine called "Computer Idee" had a seperate booklet with this months issue. It had building instructions (photographs) to build a CD changer for changing CD-Rs when making multiple copies of a disc. It didn't look like it was done in (...) (25 years ago, 6-Sep-00, to lugnet.robotics, lugnet.technic)
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| | RE: Pneumatics Are Back!
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No, nothing is marked as "limited availability." Doug Wilcox Senior Web Developer iMcKesson Provider Solutions Group-Needham 160 Gould Street, Suite 130 Needham, MA 02494-2308 Phone: 781.453.2900 x 237 Fax: 781.455.7990 e-mail: (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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(...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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I've finished updating the images of the 2-page spread of Technic accessory packs. (URL) Wilcox Senior Web Developer iMcKesson Provider Solutions Group-Needham 160 Gould Street, Suite 130 Needham, MA 02494-2308 Phone: 781.453.2900 x 237 Fax: (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | ping-pong popper
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Hi all I am in a class that uses Legos (mindstorms and others) to build robots. I have to build a ping pong popper. Has anyone done this before? Mine needs to have 4 simple machines in it., Any help would be great. Thanks Tina (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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Doug, thanks for a good job. (...) (chassis, pneumatic) are significantly higher than those of regular models (with the same parts) sold by Lego in old good times (say some five years ago, when Technic was really Technic, not Slizers or similar (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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Speaking of pneumatics, does anyone know how to get those parts in Germany? I know where I can pick up some leftover parts sets with the pistons only but I haven´t been able to find the tanks anywhere... (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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(...) Ok. My concern was that they were dropping those in favor of the new packs. I don't have the newest catalog yet, but the last one I have has "All Accessories Limited Quantities! Order Now!" on the page where that's listed. So they have that (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | RE: Pneumatics Are Back!
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You can order the 2" piston separately, #5108, $2.99 for ONE. Doug Wilcox Senior Web Developer iMcKesson Provider Solutions Group-Needham 160 Gould Street, Suite 130 Needham, MA 02494-2308 Phone: 781.453.2900 x 237 Fax: 781.455.7990 e-mail: (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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(...) cylinders? (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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I've posted scans of the more interesting "Power Packs" in the Technic line. (URL) Wilcox Senior Web Developer iMcKesson Provider Solutions Group-Needham 160 Gould Street, Suite 130 Needham, MA 02494-2308 Phone: 781.453.2900 x 237 Fax: 781.455.7990 (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Ultimate Lego Robotics Storage Case
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Since bringing my robots to the office (See the Lego Breaks thread), my one lament was that it wasn't very easy to transport robots and pieces back and forth to work (in my RIS, Code Pilot, and Research Sub boxes), which meant that I couldn't very (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: Pneumatics Are Back!
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(...) Glad to see this one survived. (...) Sure. Hopefully my catalog will come soon, but y'know... :) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Pneumatics Are Back!
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I just got the new US Explore New Worlds (Shop@Home Lego catalog) in the mail today. The service packs have partly gone away, but there are a slew of useful, cool Technics parts packs, including: 5129 Wheel Pack (Chrome hubs & rubber treads, (...) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) Perhaps because rechargeables have a faster initial voltage drop than other types and they feel that could make it seem like the RCX has poor performance or isn't working right. Perhaps. (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | RE: External supply for RCX (off topic)
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(...) safe though... All manufacturers seem to say that... its obviously a conspiracy from the multinational disposable battery cartel. Bastards, they probably killed all Nixons too ... actually will this now get flaged by Echelon... "Wow someone (...) (25 years ago, 5-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) If that is the case with rechargeable batteries, then I stand corrected. I do wonder why LEGO would caution the use of rechargeables if they are safe though... Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (25 years ago, 6-Sep-00, to lugnet.robotics)
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| | (canceled)
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| | Re: External supply for RCX
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The motor driver circuits in the RCX are current limited to somewhere around 500 mA if I remember correctly. The driver chips also have a temperature cutoff, so they will not overheat. You can short the motor with no damage. - pete. (...) (...) (25 years ago, 5-Sep-00, to lugnet.robotics)
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| | Re: New Lego fall sets
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(...) Well, what we have now is (URL), which is the test phase for what you're describing. However, I'm not too optimistic that this will lend itself well to technic. (25 years ago, 5-Sep-00, to lugnet.robotics)
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| | Re: New Lego fall sets
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(...) I called Lego Germany recently because we wanted some parts for uni (we use them in the lab... ;) ) and they said that at least in Germany they´ll soon (early September) have something like shop@home in Germany where you can order single parts (...) (25 years ago, 5-Sep-00, to lugnet.robotics)
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| | Re: New Lego fall sets
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(...) This seems to be redirected to (URL). Do you have any more information? It doesn't sound like those are very good replacements for the service packs. :( (25 years ago, 5-Sep-00, to lugnet.robotics)
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| | RE: IR Ball (was Soccer-Playing Robots)
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>>That wouldn't look as great as a free rolling ball - and the >>robots would perhaps have trouble finding it while it's in >>motion....but 28 LEDs is a heck of a lot! (...) Maybe experimenting with a lens type system to spread the light further... (...) (25 years ago, 4-Sep-00, to lugnet.robotics)
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| | New Lego fall sets
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Hello all, Today I got my hands on a new (Belgian) Lego catalog of september. In it, I find a lot of new models (for Belgium and The Netherlands), such as the DSDK, those two huge Star Wars models and a lot of racing creatures. Now I want to ask a (...) (25 years ago, 4-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) The only issue with the standard rechargeable ones is if the motor(s) short the resulting current drain could damage something. I'm sure we've all shorted a rechargeable and had the rubber wire casings melt off from the 'heated exchange'.. (...) (25 years ago, 5-Sep-00, to lugnet.robotics)
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| | RE: RCX IR-Tower and Vision Command
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This has been noticed before. I would guess that it is the result of an engineering change on the PC board, well after the molds for the tower plastic parts had been machined. They (TLG) probably tried it out, found it worked anyway, and didn't (...) (25 years ago, 4-Sep-00, to lugnet.robotics)
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| | Re: Limited slip differential
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(...) How about this for a thought - I remember reading somewhere about using the differential to keep a tracked vehicle on a straight path using one rotation sensor: (URL) using another differential in this capacity, it should be possible to detect (...) (25 years ago, 4-Sep-00, to lugnet.robotics)
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| | Re: Limited slip differential
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(...) Nice :-) (...) Time for the pedant to strike again - I think you are right in saying that this part serves a similar purpose to a synchro in a real car, but the real one gradually sychronises the speeds of the axle and the "idler" gear so that (...) (25 years ago, 4-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) quite a (...) compared (...) I regularely run my RCXs on NiMH Sanyo rechargable batteries and they works very well. Voltage is lower, but they're much more current capable then the alkaline technology ones. Ciao Mario (25 years ago, 4-Sep-00, to lugnet.robotics)
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| | Re: Vision Command
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the color sensing software works great recognizing greens, blues & reds. It has a hard time recognizing black. which kind of hinders my project of making a self recognizing robot. (it has a hard time recognizing the lens section) lighting - (...) (25 years ago, 3-Sep-00, to lugnet.robotics)
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| | Re: Limited slip differential
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Now I see it. I found the gear you were talking about on the Technica site. This if very serendipitous, as I have recently been pondering how to make a locking diff with Lego. Thanks for the intel! - Greg Simon Bogaert wrote: <snip> (...) (25 years ago, 2-Sep-00, to lugnet.robotics)
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| | RCX Sound Volume
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I built a 'communications trailer'. A truck moves it into position and stops. A mast with an antenna on the end erects. A 'satelite uplink' is establishe (plays a tune). The mast returns to the park position and the truck hauls it off. Great demo. (...) (25 years ago, 2-Sep-00, to lugnet.robotics)
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| | Re: IR to FM
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Hi, Here is a link on ebay for the exact item I was talking about: (URL) Original Message ----- From: "Simon Bogaert" <lego-robotics@crynwr.com> To: <lugnet.robotics@lugnet.com> Sent: Thursday, August 31, 2000 6:12 PM Subject: Re: IR to FM (...) (...) (25 years ago, 2-Sep-00, to lugnet.robotics)
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| | RCX IR-Tower and Vision Command
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Hello, Today I was some trying with the Vision Command. I knew camera's are able to see IR-light. When I point the camera at the IR-Tower I see some realy strange. The IR-LEDS aren't behind the "plastic lens" . Where is that lens for? With kind (...) (25 years ago, 2-Sep-00, to lugnet.robotics)
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| | Re: Limited slip differential
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I've been trying to look for a compact limited slip differential design, and the most compact design I could come up with is one in which a small pulley piece is put inside of the differential. To do this, first put together the differential with (...) (25 years ago, 2-Sep-00, to lugnet.robotics)
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| | Re: Info request
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Chris Rogers (ROBOLAB) and his graduate students built this exact thing. You might want to contact them. crogers@tufts.edu -Ben (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: Info request
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(...) Well, as I imagined the device, it just translates the IR into RF and back. This way you can't only use it between tower and RCX but also in comms between two RCX'es, which is exactly what I want to do. I don't have any experience in (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: Limited slip differential
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(...) Thanks for the compliment. :-) (...) automatic? (...) I don't know if you own a Space Shuttle or the 8880 Supercar, but I use the same system as is used in their gear boxes. I use the same piece: a block with two cross-axle holes placed (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: Info request
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(...) Thanks! You're doing a great job for the entire Lego(Mindstorms) community, providing us with almost all the electronic schematics we could possibly wish for! Don't stop constructing and don't loose courage when fighting RCX hardware... Simon (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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Wilcox, Doug writes: > I need a schematic (or--in reality--at least a resistor value, whether the > LEDs are parallel or in series, and the battery voltage used) to wire the > LEDs without burning them out, but my biggest challenge will be finding a (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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(...) Just wanted to share some other informations that are currently being discussed by email: I used a Philips IR LED intended to be used for TV remote control, it works well with 1-1,2 V and in this range absorbs about 8-10 mAh. I used a battery (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: Vision Command
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(...) The camera is compatible with the VFW and can be used as a general purpose camera with anything that uses VFW. Vision Command on the other hand, does not use VFW and therefore is not compatible with other cameras. Later, Guy (25 years ago, 1-Sep-00, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: External supply for RCX
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(...) No one has answered your Question fully so here goes. The RCX with the power Adapter port is the 'old' one. It's power port can take the following: AC or DC (It doesn't matter what direction) AC is a little easier on the RCX as it uses both (...) (25 years ago, 2-Sep-00, to lugnet.robotics)
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| | Re: Info request
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Take a look at the original reverse engineering of the RCX at (URL) best site for the internals of the RCX with pictures.... Ram PS: You could probably just use wireless serial radio modems for this! It works as follows: PC--->serial (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Vision Command in Nederland
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Is Vision Command te koop in Nederland? Zo ja, waar? Does anybody know whether Vision Command is sold in the Netherlands? If yes, where? Harrie de Leeuw Eindhoven The Netherlands (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Info request
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Ok, enough's enough! I'm going to take a crack at the IR - RF link thing for the RCX. I'm not promising it's going to be pretty (or cheap) though! But I'll try. First of all, a question - Does anybody know if the schematics for the RCX and more (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) Yes - but alkaline batteries drop gradually in voltage throughout their lives - by the time they run out, their volts are below 1.2. NiCd's on the other hand stay at 1.2 volts and dry up much more suddenly...over just seconds sometimes. Dunno (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) I've been using rechargable Eveready Renewals in one of my RCX's for quite a few months without any problems... I think it is the lower 1.2 volt compared to the 1.5V of a standard battery that they are concerned with. Dave (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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(...) That is right. It's not only a mere problem of area covering, but the main objective is to have the robot locate the ball quite quickly without a significative error. We tried at first with the same ball and less LEDs and it was working, but (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | RE: IR Ball (was Soccer-Playing Robots)
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Thanks! I _do_ get into toy stores fairly often ... but generally ignore stuff at the register and normally go straight to the Lego aisle. :) Doug Wilcox Senior Web Developer iMcKesson Provider Solutions Group-Needham 160 Gould Street, Suite 130 (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | RE: IR Ball (was Soccer-Playing Robots)
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I suspect (but am trying to confirm) that the high number of LEDs was not just to increase the area covered, but the luminosity as well. (Can one use the term _luminosity_ for IR if it's outside our visible spectrum?) The "brighter" the ball in IR (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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>That wouldn't look as great as a free rolling ball - and the >robots would perhaps have trouble finding it while it's in >motion....but 28 LEDs is a heck of a lot! Seems like a lot to me. The wider angle IR LEDs have a 60 degree cone. I think you (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: IR Ball (was Soccer-Playing Robots)
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(...) Wander into any toy store and you'll find small figures (Pokemon's etc) packed into plastic spheres that split conveniently around the equator. You should have no problem finding one of an appropriate size there were LOTS to choose from at our (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | IR Ball (was Soccer-Playing Robots)
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The Lego light sensors are particularly sensitive to infra-red (one of those gems of information that I've picked up from the robotic mailing list), so the standard Lego light sensors can be used to "see" a ball that's throwing off lots of IR, like (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) Speaking of batteries, the manual advises against using rechargeable ones. Does anyone have experience with that? Why not use them? (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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(...) Actually, the 'new' one is the one without the adapter socket. Lego stopped putting them in, apparently to save a few cents on the cost of each RCX. :-( You can get 'official' Lego adapters from (URL) the link to the item (appologies for the (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: External supply for RCX
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It's the 'older' RCX. The connector actually requires AC voltage at (I recall) 12V - I forget the amperage. (I've been using an old Panasonic answering machine psu that's 13v @ 500mA for 10months now with no problems.) -Simon "Jan Nouza" (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Vision Command and Linux?
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Does anybody know whether the Vision Command Camera works with Linux? Jürgen (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | External supply for RCX
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Hi, recently I purchased a LEGO Dacta Robotics set containing a RCX. To my surprise, the RCX was different from that I purchased with RIS 1.5 a month ago. The 'new' one has a socket for an external voltage supply (as I can guess from the '9-12 V' (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: Limited slip differential
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I thought you were a native English speaker :) One question I have: how to you engage and disenage the lock? Is this automatic? Is the mechanism more mechanical or more electronic? -Brian (...) (25 years ago, 1-Sep-00, to lugnet.robotics)
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| | Re: IR to FM
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<snapped an excellent technical description> (...) kinds (...) I wasn't exactly thinking of the RCX doing the smart job of the FM communication. I imagined more of the RCX just outputting IR signals to an apparatus that translates them to FM. These (...) (25 years ago, 31-Aug-00, to lugnet.robotics)
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| | Re: IR to FM
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(...) I'm interested, as I tried to build it a while ago and it never worked. Maybe just soldering components to a PCB will get me a better result. I already got a John Barnes style Servo commander, But I haven't used it yet due to a lack of time. (...) (25 years ago, 31-Aug-00, to lugnet.robotics)
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| | Re: Limited slip differential
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(...) Thank's! > I can think of a lot of applications for your (...) thereby (...) Applications are endless - in another e-mail to the mailing list I explained some. Do mention the differential used in the adder/subtractor and as an output selector (...) (25 years ago, 31-Aug-00, to lugnet.robotics)
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