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| (...) I don't thing tube stretch is a factor here. The pneumatic tubes do not expand very much at the normal pressures of Lego pnuematics. The tubes are relatively stiff. The volume comes from just the long length of tubing. (Think of a volume (...) (22 years ago, 6-Sep-02, to lugnet.technic)
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| | Re: dc motor blues
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| Hi All; Along the same lines, I would LOVE to control my motors so they run at constant speed under varying load. I know that it's theoretically possible to sense the RPM of a PM DC motor by tracking the drive voltage as the commutator makes and (...) (26 years ago, 4-May-98, to lugnet.robotics.handyboard)
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| | Re: Use PC's IR port instead of IR tower?
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| The basic difference between PCs/PalmPilots/WinCE IR ports and the RCX is a different physical transmission/modulation protocol. In the PC etc case the commonly used format is described by the IrDa standard (www.irda.org) where seperate IR pulses (...) (25 years ago, 12-Nov-99, to lugnet.robotics.rcx)
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| | Re: Homebrew sensors?
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| There is a single channel sound sensor on my web page: (URL) was really designed for picking up loud noises like claps. What you want would require two mics and a circuit that would take the difference between the sound levels. Better yet it should (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | Motor outputs
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| Dear all, I asked this question before but I might have used the wrong wordings. Here I try again. As you all know, the HB 's motor outputs give PVM, however, it gave me problems when I tried to amplify the power (both current and voltage.) Is there (...) (26 years ago, 2-Feb-99, to lugnet.robotics.handyboard)
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| | Robolab, byte codes and assembler
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| Having investigated rotations sensors thoroughly, I conclude they have some serious design flaws. Most notably, some samples taken during voltage transitions can be impossible to differentiate from samples at entirely different rotational positions. (...) (21 years ago, 26-Nov-03, to lugnet.robotics.rcx.robolab)
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| | Re: RCX Programming Questions and Sensor Ideas
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| I hope someone reads this reply to a reply to a very OLD message. I've been lurking for almost a month and, during a search, I found a thread I can expand. (...) [snip] (...) It is more difficult than this to recognize speech, but it can be done. (...) (25 years ago, 27-Aug-99, to lugnet.robotics)
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| | Re: Gladiator
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| (...) after it opened. After all the touble getting in (there were nine of us, only four credit cards between us and you cant get tickets to an R movie with out credit cards so we had to split it all up, etc.). After thirty minutes three people (...) (24 years ago, 14-May-00, to lugnet.off-topic.fun)
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| | Re: Using LDGLite inside LDDP
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| (...) You're right it is incorporated. I just wanted to make sure you were using the most current version instead of v1.4 with the plugin that's installed from the "Virtual Lego" book CD. LDGLite (or any other renderer for that matter) doesn't work (...) (21 years ago, 7-Apr-04, to lugnet.cad, lugnet.cad.dev)
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| | Question for the electronics experts
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| Anyone know if it is possible to hack the Power Functions remotes & receivers to operate on a different 'band'? GMLTC is working on plans for our next club layout, and we might have seven operating loops. If we are running PF trains, we'll have some (...) (10 years ago, 3-Feb-15, to lugnet.trains)
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| | A few questions
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| Hi all, I'm about to build a few handyboards, and I have a few questions. 1. I don't have convenient access to an o'scope so I'm hoping to get by without one. I am in the market for a new DMM (my birthday's coming up :->), and I've located one that (...) (27 years ago, 29-May-97, to lugnet.robotics.handyboard)
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| | IR for bots
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| Hello everyone, My thinking (albeit limited), has been that simply driving an IR LED with ac (ie:40Khz) as opposed to static dc, is enough to discriminate it from other frequencies like 60 Hz. or whatever. Then, when the detector picks up sufficient (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: A Generic Idea
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| (...) You could use an alternate firmware that can generate any tone, a custom modulation-demodulation protocol, and a condenser microphone soldered onto a sensor wire to send at reasonable bitrates for robot communication. Of course, it would take (...) (22 years ago, 5-Jan-03, to lugnet.robotics)
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| | Interest in LEGO wargaming?
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| Would anyone in the Greater Chicago area be interested in LEGO wargaming? I'm thinking BrikWars rules if there's time and interest, Minifig Death or QuikWars otherwise. I just talked to a representative of the Games Plus store in Mount Prospect, and (...) (21 years ago, 25-Mar-04, to lugnet.loc.us.il.chi)
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