 | | 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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| | Re: About Stop and Float mode
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(...) Yes - that's it - it might not be an open contact though - but a high resistance of some kind. (...) This seems a dangerous thing to do (for the health of the RCX). ---...--- Steve Baker ---...--- HomeEmail: <sjbaker1@airmail.net> WorkEmail: (...) (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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I have seen IR-to-RF converters for sale. They are been used for remote control of any TV/VCR units without having the line of sight from the TV/VCR-remote controller to the unit. It is working like this; the remote controller sends a IR signal to (...) (23 years ago, 20-Oct-02, to lugnet.robotics)
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| | About Stop and Float mode
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When I set the output to STOP mode, motor have a brake against moving, when I set output on FLOAT motor can "coast". Ok, until now, But, electrically, how what is the difference ? i mean, if I set in STOP it seems that the motor is connected (...) (23 years ago, 20-Oct-02, to lugnet.robotics)
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| | Re: LNP
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How's this? (...) (23 years ago, 20-Oct-02, to lugnet.robotics.rcx.legos)
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| | Re: LEGO MindStroms 2.0: Alternative transmission techniques
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(...) Or forbid tables etc. and communicate by reflection on the ceiling. (...) Right. Some markings on the floor can make it easier. (...) I can't imagine you never heard of leJOS ((URL) definitely runs Java on the RCX. (...) I'd also suggest to (...) (23 years ago, 20-Oct-02, to lugnet.robotics)
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