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I'm a beginner at nxt programming. I built a train drawbridge for my lego city. I thought, I would try and use the nxt technology to make the bridge go up and down as the train crossed over the bridge. I put a pressure switch at each end of the bridge. One to tell the bridge to go up and one to tell the bridge to go down. It seems so simple but has become so frustrating. If train comes from one direction each time no problem. But if the train comes from the other direction the commands get confused. I did two series of commands, each by themselves work just fine. If I put them together, since I'm using the same switches, the program gets confused. I hope someone can help me with my problem. -
I have always wanted to build a giant remote control arm but I never could since I only had the NXT set, But now since I have gotten the 8043 excavator I took a crack at it. After about 2-3 weeks of building and fine tuning I finished. I came up with the name ROTA (Remotely Operated Technic Arm) The programming took an additional day, shortly after I took some videos and put them together so here is the video explaining all the mechanisms: Pictures can be found here: http://nxtgeek.blogs...11/rota_12.html