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(...) I think using your logic you should subtract the cost of the Gameboy, because, hey, it's a gameboy. I wouldn't mind having one. Then the XRC is $269. Andy (20 years ago, 17-Jun-04, to lugnet.robotics.rcx)
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| | Re: Gameboy RCX
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(...) Oh, yes it does. Quite a bit more, actually. The original GBA still runs about $70, I believe, or the GBA SP will hit you for $100. $269 gets you both the XRC and the basic no-frills Xport that connects it to the GBA ($338 will get you the (...) (20 years ago, 16-Jun-04, to lugnet.robotics.rcx)
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| | Re: Gameboy RCX
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(...) I did a little online research and found a website that claims the "omni-wheel" has been around since 1910, and the people who built the robot were nowhere near 90 years old. It's been a few years since I saw that episode, but I think it must (...) (20 years ago, 16-Jun-04, to lugnet.robotics.rcx)
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| | Re: Gameboy RCX
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(...) I had a good look at this - it does not cost much more than the RCX (although you need other stuff and motors to use it). The non-protected boards could be got around with some good Lego construction. Since I sometimes use custom boards with (...) (20 years ago, 16-Jun-04, to lugnet.robotics.rcx)
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| | Re: Gameboy RCX
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(...) It's a kit after all... (When you build one of these, it's your responsibility to mail a royalty to these guys. ha ha) The video clip of this robot is very cool (www.charmedlabs.com...nomic.wmv) Andy (20 years ago, 16-Jun-04, to lugnet.robotics.rcx)
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| | 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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