 | | Designing a bipedal robot leg
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Around a year ago I suppose I asked about curved feet - building a robot with human-like walking characteristics. I never succeeded in the feet (although it turns out some carved foam works very well.), as the robot took one complete step but could (...) (23 years ago, 19-May-02, to lugnet.robotics)
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| | Re: What is exception "StackOverflowError" in method "<clinit>"
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(...) I have tried TextLCD.print() and it really does work. Roger (23 years ago, 17-May-02, to lugnet.robotics.rcx.java)
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| | Serial cable for Dacta Interface 70909?
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I have just bought (second hand) a bunch of Lego Dacta things (9701, 9702) with the computer interface 70909. Of course the serial cable supplied was of the wrong type - Cybermaster Female-Female, this interface needs Male-Female. Does anyone know (...) (23 years ago, 18-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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The current is going through two silicon diodes though, with attendant .5 volt drop through each so consider if that will be a problem in this application. Likely its not. (...) Tom Napolitano tomnap@bersama.net (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: cygwin error
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(...) what do i change and what PATH? (23 years ago, 18-May-02, to lugnet.robotics.rcx.legos)
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| | RE: latest legOS strangeness
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(...) Interesting question. I'll try this at home with my remote and RCX loaded with standard firmware. Anyway, that could only say that the remote control knows that it has to send a OFF (brake) cmd to the RCX when fwd and rev are pressed together, (...) (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Powering motors from the mains
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(...) I'd be a little surprised at a bridge rectifier which couldn't accept DC. Many electronic appliances have them these days so that it doesn't really matter what kind of wall wart you use, so long as the voltage is in the right range. The wall (...) (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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(...) Yes. That is what I meant. I even believe sincerely that it's what I said. :-) I am not sure who exactly within LEGO first recommended it but if you dig hard enough in lugnet.robotics I believe you will find just such a recommendation.... that (...) (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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I think you misuderstood what Larry said (or I misunderstood what you said). I think Larry was saying that you should use the wall wart from the train speed regulator, which is what Lego recommends. Also, I dont see how you could burn out the diodes (...) (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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Those who can use a soldering iron, and know their anode from their cathode, could build something like what I did: (URL) black box is a 7809 9v positive voltage regulator. See the data sheet here: (URL) used a 12v wall wart to power the whole (...) (23 years ago, 18-May-02, to lugnet.robotics)
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