 | | Re: MOC: RCX mifig-scale wire-pulled train
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(...) That's a good idea!! This would require two wagons for balancing: one going up while the other is going down. Alas!! I will never have enough bricks to build the hill!! :o( (...) No there is no mechanism to maintain the cable tension. I tought (...) (20 years ago, 16-Jun-04, to lugnet.robotics.rcx, FTX)
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| | Re: Gameboy RCX
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(...) The biggest problems I see with this are that the boards aren't protected. The odd thing is that they're not mentioning the extra battery capacity as an improvement over the RCX. I thought it would be a big problem to drop from 3AA to 2AA in (...) (20 years ago, 15-Jun-04, to lugnet.robotics.rcx)
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| | Gameboy RCX
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These guys have a robot controller that replaces the RCX that uses the gameboy as the main processor www.charmedlabs.com I'm thinking on getting one. I called them yesterday. Very nice guys. It won't ship until the end of June though :( Andy (20 years ago, 15-Jun-04, to lugnet.robotics.rcx)
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| | Re: MOC: RCX mifig-scale wire-pulled train
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(...) Chris- What a cool project! Looks like inspiration to build a funicular (the same thing but intended to go up and down hills). Of course, to do that (I'm always thinking in LTC display mode) requires a hill to go with it. I didn't see whether (...) (20 years ago, 14-Jun-04, to lugnet.robotics.rcx, FTX)
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| | 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: 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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| | Re: lego pneumatic
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(...) Good reasearch..... Using the mindstorm motors, who's torque is a good match for the small pump, the small pump gets to a static pressure faster than a large pump using hte same kind of motor. The small pump does not keep up with the total (...) (20 years ago, 9-Jun-04, to lugnet.robotics.rcx.legos, lugnet.technic)
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| | RE: lego pneumatic
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Hi , According to the (URL) a mini-compressor (using a single small pump) is actually more efficient than using double pump. It said more efficient, but not generate higher output though, correct??? (URL) produces a more persuasive test. However, (...) (20 years ago, 9-Jun-04, to lugnet.robotics.rcx.legos, lugnet.technic)
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| | Re: lego pneumatic
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(...) Interesting project. Will your car have a pneumatic engine? Pneumatic steering? The large pump can run the engine with no externally controlled switches. Steering on the other hand would require control of two switches. Both pistons expanded (...) (20 years ago, 8-Jun-04, to lugnet.robotics.rcx.legos, lugnet.technic)
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| | RE: RCX for Kids: RIS upgrade? Robolab? Other?
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Hi, That's odd. I upgraded mine from 1.0 straight to 2.0, and I only paid for the shipping. I did not order online, but on the phone. As far as choosing between Robolab and the RIS software, it depends upon the age and motivation of the child. (...) (20 years ago, 7-Jun-04, to lugnet.robotics.rcx)
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| | RCX for Kids: RIS upgrade? Robolab? Other?
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I have a Robotics Invention System 1.5 (circa 2000) that I haven't used for a couple of years now. My 12 year old daughter is interested in playing with it. Anyway, I'm trying to get newer software for her to use. I had thought there was a way to (...) (20 years ago, 6-Jun-04, to lugnet.robotics.rcx)
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