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(URL) confess not looking closely at this when it was first publicised. It's amazing. (see also : (URL) ) There is mention at the end of the page of the use of an RCX but not much additional detail... John K. if you're on the list (or anyone else), (...) (23 years ago, 21-Oct-02, to lugnet.org.ca.nalug, lugnet.modelteam, lugnet.technic, lugnet.robotics.rcx)
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| | Re: Project WIRRL Update
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Replying to myself... I dismissed commercial solutions (proper radio modems) because they all looked too expensive. But I've found a beauty: (URL) RS232 @ 38.4Kb full duplex, 15Kbit rf, integral antenna, just under £30 (~$50) each for single units. (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Anyone for Chess?
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Andy: (...) Yep, many years ago I wanted a "new" chess board. It did what your RCX robot does. It was called Phantom Chess -- 6100 by Milton Bradly. Even then it was very expensive. (about $1200 CAN) a link is here: (URL) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Project WIRRL Update
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I'm looking for an RF solution for PC-RCX communication as well, been thinking along very much the same lines as Rob seems to have so far, I too was pondering how to deal with TX/RX switching (though I've not got as far as building a circuit, and (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: LEGO MindStroms 2.0: Alternative transmission techniques
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(...) Hi! Basically I think that for communication a Cybermaster would be better, but it lacks a bit of "programmability" as far as I know. And we also want to attach individual sensors and do more than just navigation. The IR to RFand RF to IR (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Project WIRRL Update
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Hello everyone, WIRRL stands for "Wireless Infra-Red Radio Link". Creating each leg of the RF link independantly isn't really a problem (once you have a reliable 38kHz IR carrier wave). The problem is eliminating link feedback by controlling the (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: LEGO Mindstroms 2.0: Alternative transmission techniques
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(...) Andreas, IR struggles to keep contact in one room, so you need an RF wireless solution. It is possible to include a PDA with Bluetooth or WiFi support as part of your robot, and communicate between the PC and the PDA over the RF protocol, and (...) (23 years ago, 20-Oct-02, to lugnet.robotics.rcx.java)
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| | Re: Anyone for Chess?
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(...) I remember seeing one about 10 years ago, but I don't think it was very popular because of the speed and accracy. I beleive it used a touch sensor grid to detect moves, rather than scanning the board for changes. To move pieces out of the way, (...) (23 years ago, 20-Oct-02, to lugnet.robotics)
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| | AW: LEGO MindStroms 2.0: Alternative transmission techniques
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I have read the book "Core Lego Mindstorms Programming" and this book also discusses navigation. Since this is also my first project with the RCX I don't have much practical experience with navigation. I'm close to testing my dead reckoning system. (...) (23 years ago, 20-Oct-02, to lugnet.robotics)
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| | Re: LEGO MindStroms 2.0: Alternative transmission techniques
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(...) You don't discuss how the robot (or PC) knows where it is. That's the hard part - there has yet to be anything remotely like a solution reported here. We've discussed placing landmarks (like marks on the ground, flashing lights, etc) around (...) (23 years ago, 20-Oct-02, to lugnet.robotics)
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