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I know this is 3 and a half years late, but I figured I'd throw in my two cents. Attach an NXT light sensor and an RCX light sensor facing into each other. You can communicate bi-directionally by flashing the built-in LEDs. On the RCX side, this can be accomplished by switching the sensor mode between touch sensor and light sensor to passivate or ...


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The Gyro is a tricky sensor to use, but at yesterday's FLL competition in Elk River, at least 5 teams had worked out the issues to their satisfaction. I'm revealing their answers here. It is unfair to those teams, since their research does represent a significant advantage over other teams. That said, none of their solutions were complete. Each team had ...



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