 | | Re: Extreme Mindstorms Book Question
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it will be good to see novelty. (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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Gordon, That is a good question. And I agree, there isn't much out there in this regard. In my book I talk about very simple (1D) robot navigation - remembering a place that you went to and going back to it. As far as more complex navigation goes (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: Solar cells and caps: lego part #s
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(...) The solar cell is part no. 32339, and the capacitor is part no. 32342. (...) Ok I unscrewed the capacitor's housing to get a better look. The main capacitor is a "Gold Cap" brand electrolytic, 2.5V, 1F (!). It's soldered to a small circuit (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: Solar Cell Output in Direct Sunlight
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(...) That sounds about the right number. Whether it's enough to cover the cost of driving it depends on the nature of the vehicle. If it's something that only goes in straight lines then in can adjust the panel one time - and then only have to make (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: Solar Cell Output in Direct Sunlight
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(...) was delayed by over 24 hours from crynwr.com to LUGNET, and Steve emailed me a copy of the reply as well, I assumed it was private correspondence and replied in kind. Here's most of what was said: Steve Baker wrote: (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: Solar Cell Output in Direct Sunlight
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(...) The experts say that such a scheme can increase total power collected by up to 40%, though I'm not sure if this includes the power required to drive the steering mechanism. See: (URL) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Solar cells and caps: lego part #s
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(...) Do you have the Lego part numbers for these? Is the capacitor like the commercial MaxCaps or SuperCaps? If so, we use these for NVRAM backup and could use them or might make them available to interested people. Thanks Bruce Boyes ------- (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | RE: RCX & Cybermaster (VLL comms and MicroScout)
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I think that a pBrick like RCX or CM isn't fast enough to detect PWM cycles. Don't know the speed of a legOS program. On top of that, I think that the sensors detect resistance, not voltage. You can do this test yourself, using two RCX's or one RCX (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | RE: Need for chat server?
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Yes, I also like the static facilities of message-boards, newsgroups and mailing-lists, because it becomes a searchable info resource. To me, the use of a LUGnet IRC server (or simply a #LUGnet channel in any other ircnet), would be useful to simply (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: Solar Cell Output in Direct Sunlight
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(...) I agree - and another factor is the angle of the panel to the incident light. The amount of light varies as the cosine of the angle of the sun to a line thats perpendicular to the panel. Building some kind of a mechanism that tilts the panel (...) (24 years ago, 25-Mar-01, to lugnet.robotics)
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| | Re: New Group?
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(...) Well, sometimes there's only one way to find out -- build it and see if they come. If we create a group/list for it and it turns out DOA then we can either delete it or ignore it. If there's a user-base for GBP, and you've got (...) (24 years ago, 26-Mar-01, to lugnet.robotics, lugnet.robotics.rcx)
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| | Mounting non LEGO parts using M6 metric screw
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Hi, you can mount mechanical components to LEGO bricks by using a M6 metric screw. The meassurement of the tubes inside of LEGO bricks is ideal for this size of screws. See (URL) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: The Making of "Creative Projects with LEGO Mindstorms"
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I have your book on order already from booksamillion.com. Alan Alan Carmack Pflugerville, TX "To Russia with Lego": (URL) lugnet member page: (URL) (24 years ago, 26-Mar-01, to lugnet.books, lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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(...) Agreed. I think that is a long way though. If you look at a lot of the current research, it is about tiny systems. I don't want information on large and complex systems, but clever systems. I am really keen to have my robots learn for (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | New Group?
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Hey Todd (and others), I was thinking it was time for a sub-group for those of us using 'Gordon's Brick Programmer". Maybe lugnet.robotics.rcx.gbp ? _I_ could sure use some group support... Are there enough of us out there to make it worthwhile? (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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This may have to do with the (debatable) fact that the Lego Mindstorms RIS is _not_ an "advanced robotic platform" It was engineered so that the average 12+ year old could play around with robotics concepts. It was never meant to to be the be-all of (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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(...) Ben, My point was, if I already know a lot about the sort of things you have listed, where do I go now to take it to the next level. I haven't found that the available books on Mindstorms do this. For example, some ideas on robot navigation (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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Henry, Thats what I've found as well. My last post might have sounded a bit strong, but I get really annoyed when I go out and buy a book ($50-$100 in Australia), and read it from cover to cover in a couple of hours, and get nothing from it. This (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: The Making of "Creative Projects with LEGO Mindstorms"
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Cool site, Ben. Looking forward to your book! -- Bob Fay rfay@we.mediaone.net (URL) Erwin" <ben@alum.mit.edu> wrote in message news:GAsADu.56u@lugnet.com... (...) itself (...) (24 years ago, 26-Mar-01, to lugnet.books, lugnet.robotics, lugnet.robotics.rcx)
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| | Re: Extreme Mindstorms Book Question
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(...) Perhaps this is because many of the authors have had Mindstorms webpages up before they published any books. True, if one is willing to spend a few hours researching on the web, one can find more info on Mindstorms than any one book can cover. (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | The Making of "Creative Projects with LEGO Mindstorms"
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(URL) week I had the opportunity to watch my book get printed. The book itself is about the process of making a robot -- so here is a website about the process of making the book -- which itself is very robotic! -Ben (24 years ago, 26-Mar-01, to lugnet.books, lugnet.robotics, lugnet.robotics.rcx)
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| | Re: Extreme Mindstorms Book Question
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(...) Some of the "advanced" (according to Gordon's definition) engineering, physics, and math topics covered in "Creative Projects with LEGO Mindstorms": Engineering Aside: Feedback Engineering Aside: Top-Down and Bottom-Up Design Engineering (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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I have to disagree here. I have looked at all the current Mindstorms books and NONE of them are much use to the advanced user. I have only been into Minstorms for 4 months, but everything in these books, I had either figured out for myself, or found (...) (24 years ago, 26-Mar-01, to lugnet.robotics)
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| | Re: Lego Remote Control - Here's The Scoop
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John Barnes <barnes@sensors.com> wrote in message news:4.2.0.58.200103...lserver... [Snip] Thanks for the info, John. Just going to check out Australian remote control stuff.... (...) control (...) multiple (...) It can be done using LegOS - but it (...) (24 years ago, 26-Mar-01, to lugnet.technic, lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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For an advanced user, you will enjoy this book. I brings together some of the best of people. Michael Gasperi's part four in the book gets into passive and powered sensors. There include, the coin detector, Stick in ring switch, Thermistor temp (...) (24 years ago, 25-Mar-01, to lugnet.robotics)
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| | Extreme Mindstorms Book Question
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Hi all, I am looking at buying the book - Extreme Mindstorms. Any comments welcome. I am an advanced user, and am looking for some ideas. For those who have it, what customized sensors do they provide instructions to build? Dave (24 years ago, 25-Mar-01, to lugnet.robotics)
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| | Re: Solar Cell Output in Direct Sunlight
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(...) Well, I could certainly create an artificial environment which would increase the solar cell's output without the need for scheduling another test on the summer solstice, if you were merely curious as to its maximum output based on the cell's (...) (24 years ago, 25-Mar-01, to lugnet.robotics, lugnet.dacta)
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| | Re: Solar Cell Output in Direct Sunlight
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(...) I'd suggest that you try this again mid-summer. The solar radiation angle is still fairly low at this time of year with much of the energy being scattered by the atmosphere as well as being spread over a larger surface area of the earth. I (...) (24 years ago, 25-Mar-01, to lugnet.robotics, lugnet.dacta)
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| | Re: Curved Feet
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What kind of ankle joint? A motorized one, or passive one? If it is the first type I think the leg will be too heavy to be moved quickly. That is critical since the robot falls onto itself. Looking closer at the design, I think that you only need to (...) (24 years ago, 25-Mar-01, to lugnet.robotics)
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| | Re: Curved Feet
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Is this set still available? If so, does anyone know where it may be purchased? (URL) (24 years ago, 24-Mar-01, to lugnet.robotics)
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| | Re: Curved Feet
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After viewing the walder movie, I wonder if it would work with flat feet, and an ankle joint? Gravity would keep the flat foot pointed down when the leg was lifted. - pete. (...) -- Pete Sevcik sevcik@flash.net Techno-stuff Robotics (URL) for FUN ! (24 years ago, 24-Mar-01, to lugnet.robotics)
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| | Solar Cell Output in Direct Sunlight
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Well, it finally got sunny here. In direct sunlight, the solar cell seems to put out about 4V, 135mA (24 years ago, 23-Mar-01, to lugnet.robotics, lugnet.dacta)
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| | Lego Remote Control - Here's The Scoop
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Hi ! As some of you have noticed, Ms. Jennifer Clark showed off her beautiful new truck model at the Cheshire Legofest recently. The truck was equipped with a prototype radio control system which she has been kind enough to test for me. The (...) (24 years ago, 23-Mar-01, to lugnet.technic, lugnet.robotics)
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| | Re: Curved Feet
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(...) Many Znap set have smooth curve part. They can be connected to Technic parts. (24 years ago, 23-Mar-01, to lugnet.robotics)
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| | Re: Cheshire LEGOFest pictures
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(...) Great! If there's anything I'd like to be able to have instructions to it's probably your models. (and perhaps the MIBO dog will go on the same list...) - David (24 years ago, 23-Mar-01, to lugnet.loc.uk, lugnet.technic, lugnet.robotics)
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| | Re: More juice out of the standard motors.
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Yes, I tried it. I don't know how the internals of the RCX work; all I know is I put 12V in, and got 9V out. -- Mark Haye, mhaye(at)tivoli(dot)com "Matthias Jetleb" <jetleb@netcom.ca> wrote in message news:3ab97dfc.301576...net.com... (...) (24 years ago, 23-Mar-01, to lugnet.robotics)
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| | Re: Curved Feet
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Well, if you read the page, you will find that they did papers on this principle. Try looking one directory back. Anyway, in the paper A 3-D passive-dynamic walking robot with two legs and knees, they described how they built the robot. Since thier (...) (24 years ago, 23-Mar-01, to lugnet.robotics)
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| | Re: Curved Feet
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(...) How about curved railway track? IIRC that gives you pieces about 16 studs long (little less for inner rail, more for outer) with an angle of 1/16th full circle (22.5 degrees). You can then call the beast "big foot" :-) Jürgen (24 years ago, 23-Mar-01, to lugnet.robotics)
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| | Re: Cheshire LEGOFest pictures
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(...) A flurry of activity! The r/c unit is indeed John's baby so you'd be best writing to him about it. It is an excellent unit which took a lot of work to source parts, design and build, so I think he has every right to receive a mometary reward (...) (24 years ago, 23-Mar-01, to lugnet.loc.uk, lugnet.technic, lugnet.robotics)
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| | Re: 3 Robot Project - ALL DONE ALMOST
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Sorry about getting to this so late. This message got lost. (...) I suggest replacing the wheels on your caster with medium pulleys (the ones similar to 24t gears), WITHOUT putting the "O-ring" tires on them. I have found this to be an excellent (...) (24 years ago, 23-Mar-01, to lugnet.robotics)
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