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LEGO mobile bridge (bridge-layer). Lejos/NXT. AiTEL project 2009

(Musical score listed below) Final version of our LEGO bridge-layer. A two-component system consisting of a belt driven vehicle and the bridge itself. The bridge is equipped with two motors that folds and unfolds it while being raised/lowered from the vehicle. The vehicle is then able to drive over the bridge and pick it up again from the other side due to clever (electric) contact points fitted to the bridge and fork. The NXT is running Lejos 0.85. The lowering and pick-up of the bridge is hardcoded (could probably have been solved dynamically with the use of another NXT). Due to this, and the fact that lego is rather unpredictable, it doesn't work 100% all the time. This build has been solved by using non-standard LEGO tools, including a leatherman, a multimeter, double-sided tape, strips, aluminum-foil, copper wires, and CRC 5-56 (didn't have WD40 at hand). After working rather well for 14 days the build couldn't handle the stress anymore. Under the presentation of our project at school it broke down (some of the gears shattered). The bridge uses 16 large gears, 11 small and 4 scrolls. The vehicle uses two omni-gears (the big things at the front), a whole bunch of small gears, two gear-boxes (yellow) and a lot of strips to secure everything together - obviously to well (since the gears split). During this project we broke something around 11 gears, and twisted a lot of LEGO. Around 250 working hours has been put down to complete this project (design, build and code). The only way to make something of this size durable is probably using Tetrix. I don't think pneumatics will be able to do it better than the 5 motors we used. Pictures from development here: https://plus.google.com/photos/112271... -- Team FailBoat Since everybody keeps asking about the music: 0:00-0:29 Rob D - Clubbed To Death [Kurayamino Mix] (Known from the Matrix) 0:29-0:39 The Delfonics - Ready Or Not Here I Come (For Love) (Covered by the Fugees) 0:40-1:40 Dick Dale and his Del-Tones - Miserlou (Known from Pulp Fiction) 1:40-2:30 The Centurians - Bullwinkle (Known from Pulp Fiction)