 | | Code-only Line-tracking competition
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You can enter the WORKSHOP 3D LEGO RCX Challenge - a robot competition to be held in Seattle on October 6th - even if you don't want to travel here. There will be a "code only" line-tracking event that anyone can enter. Build a "standard robot" at (...) (24 years ago, 7-Sep-01, to lugnet.robotics, lugnet.robotics.rcx)
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| | RCX 3.0 and legOS 1.2.4
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LEGO company will release RCX 3.0 at the end of next year, it will have 6 input port and 6 output port, 20x200 dots LCD, CPU is H8/3294 with 32K ROM and 64K RAM, it has a power socket as RCX 1.0, and with a built-in speaker, you can play wav or mid (...) (24 years ago, 7-Sep-01, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: Anyone know how to build a stall sensor?
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(...) Yes. I just got a rotation sensor. Trouble is that the motors could stop for a variety of reasons (like the robot isn't moving). That isn't the real reason though (I could always handle that in software). The real reason is that ever since I (...) (24 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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| | Re: Anyone know how to build a stall sensor?
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(...) Yes. I found on article on using the battery voltage to determine the same thing, i.e. more current, less volts. To do it you need replacement firmware. I use leJOS (a Java VM), I'm one if the developers, so I could go in that way. I'm going (...) (24 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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| | Re: Anyone know how to build a stall sensor?
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(...) Hi Paul, I was interested in doing the very same thing a while ago. It sure would save on sensors if the motors had their own feedback! I know (as you are probably aware also) that the current can be monitored using the cybermaster. I saw how (...) (24 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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| | Re: Anyone know how to build a stall sensor?
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I assume you have already discarded the simple approach of using a rotation sensor and detecting that it has stopped rotating. (This gives you an odometer for free!) Or if you don't have a rotation sensor, you can use the half width six hole pulley (...) (24 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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| | Re: Anyone know how to build a stall sensor?
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(...) No. I didn't know it existed. Of itself it is interesting, but I actually want to use stalls as a means of collision detection. (...) (24 years ago, 6-Sep-01, to lugnet.robotics.rcx)
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| | Re: Anyone know how to build a stall sensor?
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(...) I suppose you've already considered using the white 24 tooth clutch (looks like a gear)to limit the torque and prevent motor stalls... Jerry (24 years ago, 5-Sep-01, to lugnet.robotics.rcx)
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| | Anyone know how to build a stall sensor?
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Hi, I'd like to be able to monitor the current being drawn by a motor using the RCX (not the CyberMaster :-( ), so that I can detect stalls and possibly spins. I can't believe that this is particularly hard but I can't find any references to one on (...) (24 years ago, 5-Sep-01, to lugnet.robotics.rcx)
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| | Re: RCX IR protocol
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Hi, Juergen has done a small mistake in his example. (...) Better it should be ~f7=~11110111=00001000=08. If you want to get a little bit of math you may add every number to its complement and you will always get ff for the result. If we take (...) (24 years ago, 4-Sep-01, to lugnet.robotics.rcx)
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