 | | RE: (furby)tizing
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You might take a look around at (URL) or (URL) There is (was? they're a few years old) a fairly active hacking community. The autopsy theme alone is worth visiting the first site for. Complete with toe tags. You'll find a complete schematic and some (...) (25 years ago, 7-Nov-00, to lugnet.robotics)
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| | (furby)tizing
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Has anyone scrapped a furby for use with an rcx? There are many components inside furbies that would make good sensor components, tilt sensors, sound sensors, swithes, ect. Does anyone have thoughts on this and has anyone succsefuly taken apart a (...) (25 years ago, 7-Nov-00, to lugnet.robotics)
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| | Re: Gear spacings.
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This may be more appropriate for lugnet.technic. There has been postings or listings of these before, but don't let that stop you. You should add the turntable gears (outside is 56t, I think) somehow. I also would rather see the vertical in mixed (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Re: Cheap motors
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"John Heins" <Johnmhiii@aol.com> wrote in message news:G3L5n1.BF9@lugnet.com... (...) If only we had them overhere... (...) ARE those gears called??? Gearballs? Duq (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Gear spacings.
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I've never seen a table of allowed spacings between gear wheels. (For example, two 40t gears will mesh nicely if spaced apart by three studs horizontally and 3 and one-third bricks vertically). I wrote a little program to compute all possible (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Re: LEGO Mindstorms Book
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"Tim Hatch" <lego-robotics@crynwr.com> wrote in message news:003301c04788$a5...nt87636... (...) Sorry there are no expanders/multiplexes. The sensors part of Extreme Mindstorms book is designed to take a person with limited electronics experience (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Re: Motorize Focus on Vision Command Camera
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"Harri 'Junkarn' Manni" <lego-robotics@crynwr.com> wrote in message news:Pine.LNX.4.10.1...vika.se... (...) Sorry for the trauma! I have nightmares about the remaining half. How can I explain its presence in my inventory? What can I do with it? (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Re: MOC: Radio Controlled Tank.
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(...) Thx. (...) I use a 1x3 plate when I want more traction. The problem is that the plates often get ripped of when driving... I prefer the low-friction solution. I am thinking that some glue from my glue gun on each tread link will do the trick. (...) (25 years ago, 6-Nov-00, to lugnet.technic, lugnet.robotics)
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| | Re: Motorize Focus on Vision Command Camera
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Hi Robert, (...) thanks for the pictures. One may call your design a bit untraditional and questionable, but on the other side it is a pragmatic and fairly compact solution. I tried to construct a drive made of a single tire meshed with the focus (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Re: Motorize Focus on Vision Command Camera
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(...) Argh.. A totaly massacred turntable! You should warn more before showing things like this on the web.. :) (Looks excelent btw.) //Harri Manni -"Do not take life too seriously.You will never get out alive." (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Re: AI in RCX
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Hi! Sorry I missed out on the discussion... hope this is not too late to be of some use. I have to agree with Andy here. This type of thing is doable- not easy, but doable. I've implemented some fairly substantial reinforcement learning algorithms (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | Cheap motors
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Toys R Us in the metro NY Area (and elsewhere I suspect from the Ebay listings) is selling Znap sets on clearance. The motorized sets are going for $9.97 - far cheaper than the cost of a motor alone. They also include a short electrical cable, one (...) (25 years ago, 6-Nov-00, to lugnet.robotics)
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| | GFLTC at the Mindstorms Mall Tour last Saturday
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Hi all, The Greater Florida LEGO Train Club had a display at the LEGO Mindstorms Mall Tour in St. Petersburg, Florida last Saturday (Nov. 4). We (KK and I) had a great time and had allot of positive feedback from the public and the LEGO people. Here (...) (25 years ago, 6-Nov-00, to lugnet.trains, lugnet.robotics, lugnet.events, lugnet.loc.us.fl) !
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| | Re: LEGO Mindstorms Book
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----- Original Message ----- (...) Does this book also cover sensor expanders/multiplexers? Thanks, Tim (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: Mindstorms RIS 2.0??
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(...) Spring... 2001 Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Mindstorms RIS 2.0??
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Anyone see any rumors about when RIS 2.0 might be hitting the shelves? (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re: AI in RCX
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chv Yes, (URL) really a good site for this kind of stuff. I had read through it some time ago already. But still want to have more advice. Yiu (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re: AI in RCX (from proposer)
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rch8 There is no need to apologize as everyone could has his own view. Of course, I understand that you do not have any bad intention. And I believe that there is no "bad" people in our Lego playing groups. Thanks anyway. Yiu (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re:AI in RCX (from proposer)
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Ok! I should NOT have said that programming neural-networks on the RCX is impossible, and that the only way is to use the PC. And to Yiu, I would like to say that I had no intention of detering you from this project. I agree completely with Andy (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re:AI in RCX (from proposer)
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Dear All (...) Yes, that's why I ask for your advice and help. (...) ultra-sonic sensors, so you would need to provide these yourself. The ultra-sonic sensors are already ready (Thanks to JB). They work similar to a light sensor, give reading from (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re: Motorize Focus on Vision Command Camera
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I works quite well! (URL) Fay rfay@we.mediaone.net The Shop (URL) Fay" <rfay@we.mediaone.net> wrote in message news:G3J75I.89A@lugnet.com... (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Motorize Focus on Vision Command Camera
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The glue is drying. Check it out at: (URL) sawed the tabs off the large half of the Big turntable and scraped the ridge from the center hole. The gear is braced and the glue has been applied. It will be driven with a micromotor and gear train. Tune (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re: AI in RCX
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I think that you should not immediately discount the idea of nueral networks in the RCX. Bert van Dam has done amazing stuff with networks on the RCX, and using no PC code. The point of the RCX is to try, learn, and invernt, not to say that it is (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re: Motorized VC cam focusing
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If you are willing to give up a half of a large turntable, you could glue the large geared half to the rubber on the camera and drive the gear with a motor on top of the camera. A 26t gear will mesh with a gear head motor on top, but it is a bit (...) (25 years ago, 5-Nov-00, to lugnet.robotics)
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| | Re: How2 'count' in NQC
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I want to thank everyone who helped with the double problem of switch de-bouncing and that loops can often count continuously while the switch is in actuation. There were good suggestions about removing delays from the code and 'counting' upon (...) (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: MOC: Radio Controlled Tank.
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Tobbe, This is a nice looking model, especially with all the functions. As to more traction, you could use alternating regular chain links and tread links and mount a 1x4 plate on each tread link, studs out. I'm not sure how realistic this would (...) (25 years ago, 4-Nov-00, to lugnet.technic, lugnet.robotics)
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| | AI in RCX
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(...) AI on RCX] I will believe it when I actually see it. Until then, it remains to me a conceptual possibility (like all projects), but a practical impossibiltiy. My primary reason for suggesting that the goal of the project be reduced was to (...) (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: AI in RCX
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Don't forget to take a look at (URL) great site for this kind of stuff. - Christophe - (...) (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: AI on RCX - oops
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I forgot to metion.. a very good, and practical book on Neural Networks is "Machine Learning" by Tom M. Mitchell (1997). Includes theory and examples. But working with Finite State Machines is a much more reasonable starting point for RCX. rama (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: AI in RCX
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You picked a challenging project. It is not possible for the RCX to do Neural Networks alone, since the RCX does not have the command set, and is not a fast enough processor to calculate the weights of the Neural Network. Also, the RCX doesn't have (...) (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: Motorized VC cam focusing
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(...) Well i havent tried anything myself but i think the most effective way would be to use a tire in contact with the lens. You've probably tried that already, but it was the first thing that came to mind. hope it helps. (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Motorized VC cam focusing
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Hi, I wonder if anybody has succeeded in building a motorized focus controller for the Vision Command cam. So far I have tried several ideas but none was very effective. I am looking for better ideas. Jan (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | AI in RCX
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I want to program AI into RCX that can avoid objects by the readings of 3 three ultra-sonic sensors. I am supposed to use Neural Network. But I difficult as the programming is limited by the RCX (even RCX 2.0 is used) Would you be kind enough to (...) (25 years ago, 4-Nov-00, to lugnet.robotics)
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| | Re: How2 'count' in NQC
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In lugnet.robotics, Jerry Kalpin writes: [SNIP] (...) There is an EDGE mode available through the firmware that only counts transitions between pressed and non-pressed (actually some raw threshold value if I remember correctly) states. This sensor (...) (25 years ago, 3-Nov-00, to lugnet.robotics)
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| | Re: How2 'count' in NQC
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I have noticed this ongoing thread about the difficulties of debouncing and counting switch closures, and I must say that it is a very real problem anywhere electromechanical switches are interfaced to electronics which is orders of magnitude (...) (25 years ago, 3-Nov-00, to lugnet.robotics)
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| | Re: How2 'count' in NQC
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Steve, this is the third time you have helped me, and this time you obviously spent a lot of time working out the alternatives. First of all, the Wait (DELAY); in my inept code was not to flash every half second. It was to prevent additional counts (...) (25 years ago, 3-Nov-00, to lugnet.robotics)
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| | Re: Radio Controlled Tank - tread lightly.
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(...) Yes, please! :) Have to check if they sell Funrise brand toys here in Sweden. //Harri Manni -"Do not take life too seriously.You will never get out alive." (25 years ago, 3-Nov-00, to lugnet.robotics)
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| | Re: MOC: Radio Controlled Tank.
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(...) Here's an idea you can try to have them slip a bit less. Do you have the ordinary chain links too? Then ones without the wide tread? If so use an ordinary chain link for every third link, say. Like this: ##=##=##=##= Perhaps this will give (...) (25 years ago, 3-Nov-00, to lugnet.technic, lugnet.robotics)
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| | Re: MOC: Radio Controlled Tank.
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(...) Thanks :) (...) Yes, they sure were. One of 'em I even managed to scare twice, first when the tank entered the room and then when it actually fired a projectile :) To bad it takes almost half a minute to set the cannon horisontally, I have to (...) (25 years ago, 3-Nov-00, to lugnet.technic, lugnet.robotics)
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| | Re: MOC: Radio Controlled Tank.
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(...) Thanks! So do I :) (...) It's from before my dark ages, mainly the 8851 Excavator and the 8660 Arctic Rescue, I also got two with the 8843 Fork Lift truck. They usually look better then they work since they tend to slip a lot, but in this case (...) (25 years ago, 3-Nov-00, to lugnet.technic, lugnet.robotics)
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