 | | 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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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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| | 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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(...) 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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| | 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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| | 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: 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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| | 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: 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: 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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| | 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: 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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| | 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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(...) 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 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: 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: 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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Henry, I would have to disagree about the non-Mindstorms book part. If you could point out particular books that you liked then that would be helpful. When I was researching for ideas for my book I searched on sites like Amazon for "robot" and (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: Extreme Mindstorms Book Question
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(...) I agree that finding books on behaviour is a bit difficult.. That dives into the big world of computer programming... The robotics books I am referring to are at college now, and next time I'm on campus I'll look up their names (sorry for the (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: New Group?
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As the author of GBP I get 3 or 4 emails a week about it and there have been 9,647 hits (I just checked) or the download page since I installed the counter about a year ago. My only problem with the idea of setting up a GBP group is that it might (...) (24 years ago, 27-Mar-01, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: New Group?
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(...) Umm... That would be me. (j/k) Or is this a trick question? I bet this is one of those damn transcendentalist(sp?) questions, isn't it? =) -Gordon (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: New Group?
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(...) If that is you Gord, then I think you have got a new email address and maybe a new continent! Malcolm S Powell (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: New Group?
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Hi All, Although I started with NCQ I've used Gordon's Brick Programmer quite a bit. Its neat for putting things together quickly and I use the library import screen a lot to reuse bits from old projects. I'd like to hear about how other people use (...) (24 years ago, 27-Mar-01, to lugnet.robotics, lugnet.robotics.rcx)
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| | Solar cells and caps: lego part #s
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This whole Lego capacitor thing strikes me as somewhat intriguing. The super-caps, which are doubtless used, absolutely cannot be charged backwards, they have to have the correct polarity. And all the Lego electrical "stuff" like the RCX sensors, (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | RE: Electrical Data Link between 2 RCXs
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Hi Bernd :) I see we're working in the same subject here :) *great* If you care to browse lugnet.robotics old thread "VLL *input* for RCX/CyberMaster (in NQC) ?" or the newer one, starting with "CM-RCX" (the subject had some variations) Your (...) (24 years ago, 27-Mar-01, to lugnet.robotics.rcx.nqc, lugnet.robotics)
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| | Re: Solar cells and caps: lego part #s
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(...) The capacitor is very much polarity-sensitive. It has +/- polarity indicators on either side of the standard 2x2 9V terminal, as does the solar cell, and it will not work if the polarity is reversed. (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | AI in MindStorms
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I had done a project that integrated the Neural Network and Fuzzy Logic into the RCX for Navigation by legOS. Of course, the network models are simple due to the limited recources. I do not have time to manage the materials and upload them yet. But (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: AI in MindStorms
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My entire goal is AI with mindstorms as input sensors. I'll put up a web page as soon as I have anything. Scott (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | lego cap, polarity, etc
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(...) I don't have one, but can make some guesses. A bridge only works with an AC input - it can't correct the polarity of a DC input. So the Lego cap either has an AC input possibly through a bridge or a DC input which is the correct polarity by (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: lego cap, polarity, etc
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(...) connectors. Uh, a bridge wouldn't be very good if it didn't handle inputs that switched polarities. A bridge should work just fine with a DC input of any polarity (of course for any DC input, only half of the bridge is actually being used). (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: lego cap, polarity, etc
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(...) Right, what I was trying to say is that a bridge can't 'invert' a DC input of one polarity to make an output of another polarity - it can't "correct" anything, a diode can only conduct or not conduct. All a bridge can do is route the given DC (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | Re: lego cap, polarity, etc
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If I read correctly, it sounds as if there are + and - signs on the capacitor, which would imply that there is something that would block an incorrect polarity on the terminal. Maybe the diode and the 2 transistors on the board do this, I do not (...) (24 years ago, 27-Mar-01, to lugnet.robotics)
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| | RE: lego cap, polarity, etc
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That's right - it only needs to protect the capacitor from wrong polarity, but does not have to compensate. Maybe the instructions simply say "if it doesn't work, rotate the connector 90 degrees". Maybe the LED gives some indication if it is (...) (24 years ago, 28-Mar-01, to lugnet.robotics)
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| | (canceled)
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| | Re: lego cap, polarity, etc
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(...) The capacitor doesn't come with any instructions, at least not when purchased individually. The LED indicates when the capacitor is fully charged; when it reaches full charge, the LED begins flashing. I'm assuming at least one of the other (...) (24 years ago, 28-Mar-01, to lugnet.robotics)
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| | Internal Photos of the LEGO Capacitor
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Okay, here's top and bottom photos of the LEGO capacitor's circuit board. They're not the best, but the circuit board is only about 1" square. (URL) Regards Micah J. Mabelitini - LUGNET #918 The University of Kentucky SECC Middlesboro Academic (...) (24 years ago, 28-Mar-01, to lugnet.robotics, lugnet.dacta)
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| | Re: Internal Photos of the LEGO Capacitor
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Ok, I gotta jump in here for a minute, I have 6 Solar cells and 4 Capacitors, I am building them into the Wings of my Robot. (URL) Heres what I know about the Solar Cell and Capacitor. Solar Cell output 2.5 volts direct sunlight, Capacitor and solar (...) (24 years ago, 28-Mar-01, to lugnet.robotics, lugnet.dacta)
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| | Re: Internal Photos of the LEGO Capacitor
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(...) <snip> Their solar panel specs are wrong, or at the very least extremely conservative to the point of being incorrect. I've pulled 4 volts in direct sunlight, even more under a 2 million candlepower spotlight at 6". Assumingly the capacitor (...) (24 years ago, 28-Mar-01, to lugnet.robotics, lugnet.dacta)
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| | RE: lego cap, polarity, etc
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(...) Agreed - a bridge is not an inverter. Pardon this poor representation of the circuit: +---|<----+----|<---+ | | | | B (batt) | | | | +---|<----+----|<---+ | | +--------| |--------+ + (cap) The bridge is able to correctly 'route' the current to (...) (24 years ago, 28-Mar-01, to lugnet.robotics)
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| | Re: Electrical Data Link between 2 RCXs
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Hi Marco, it is always interesting how many other people in the world do have the same problems or are dealing with the same subject. Sometimes I had the feeling that I dealt with "exotic" problems but then I realized that other "Mindstormers" had (...) (24 years ago, 28-Mar-01, to lugnet.robotics.rcx.nqc, lugnet.robotics)
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