 | | Re: Straight moving with only one rotation sensor
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I tried to include the LDraw file but I had problems posting. (URL) (20 years ago, 12-Jun-04, to lugnet.robotics.rcx.nqc)
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| | Re: Control Cybermaster from RCX with feedback
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(...) I think it's theoretically possible to communicate an 8 state signal from the RCX to the Cybermaster's passive sensor port. The passive sensor port measures resistance as well as using a switch - the 3 switches in the cybermaster set have (...) (20 years ago, 11-Jun-04, to lugnet.robotics.cybermaster, lugnet.robotics.rcx)
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| | Re: Control Cybermaster from RCX with feedback
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(...) This might be old news, but I just tried it anyway... You can connect an RCX motor port to a CyberMaster sensor port and vice versa and get tri-state info. You can distinguish between the motor floating, off, and one of forward or reverse (...) (20 years ago, 11-Jun-04, to lugnet.robotics.cybermaster, lugnet.robotics.rcx)
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| | Re: Control Cybermaster from RCX with feedback
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(...) Yes, I also hoped for some ready made NQC library e.g., since I saw someone was working on that once (around 2001 in one of these newsgroups) Morten (20 years ago, 11-Jun-04, to lugnet.robotics.cybermaster, lugnet.robotics.rcx)
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| | Re: Straight moving with only one rotation sensor
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I did this in the past (since disassembled the bot) and found it to be quite reliable; except on slippery surfaces and carpet. :) The trick that I employed was to gear-up the rotation sensor. This causes the rotation sensor to detect even a slight (...) (20 years ago, 11-Jun-04, to lugnet.robotics.rcx.nqc)
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| | Re: Straight moving with only one rotation sensor
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Have you come across the adder/subtractor drive? Although it make the gear chain slightly more complex - it may mean you can leave out the sensor entirely. The drive has two inputs (A and B), and two outputs - one being A+B, and the other A-B. So if (...) (20 years ago, 10-Jun-04, to lugnet.robotics.rcx.nqc)
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| | Re: Control Cybermaster from RCX with feedback
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(...) It might be theoretically possible to use one RCX sensor port for control of the cybermaster - and using the one motor and one sensor port on the cybermaster. A few multiplexing designs I've seen use switching between passive and active sensor (...) (20 years ago, 10-Jun-04, to lugnet.robotics.cybermaster, lugnet.robotics.rcx)
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| | Control Cybermaster from RCX with feedback
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Is it possible to interface a cybermaster and an RCX without the use of a PC, also without using up all sensor and motor ports? Sincerely, Morten H Pedersen (20 years ago, 10-Jun-04, to lugnet.robotics.cybermaster, lugnet.robotics.rcx)
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| | Re: Straight moving with only one rotation sensor
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(...) Sounds good. I use a CyberMaster for the movement part of the robot because it has tachos on each internal motor. I modify the power settings for the motors to keep the robot (reasonably) straight, rather than stop and start them. If you tried (...) (20 years ago, 10-Jun-04, to lugnet.robotics.rcx.nqc)
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| | Straight moving with only one rotation sensor
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Hi I saw in the LEGO Mindstorms Web Page that many people made their robots with 2 motors go straight using one rotation sensor on each wheel and stopping the correct motor until both sensors were equal. I got Ultimate Accessory Set as a present (...) (20 years ago, 10-Jun-04, to lugnet.robotics.rcx.nqc)
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