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Which set did you motorize?

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Even though most of the new Technic sets use the studless building style, it is sometimes hard to combine them with the NXT. Especially when the model is relatively small and you want to keep the total creation compact. There are many sets that have been motorized, but I didn't see a compact version of an 'nxtisized' Off Road Truck (LEGO #8273) yet. Therefore, I decided to give it a try. At the moment it moves aroud the room very smoothly, using the arrow keys on my keyboard and RobotC. I will implement sensors into this truck later, to allow it to move through the room autonomously.

The four wheels in the back are all driven by two differentials and they can tilt, just like the original version. To place the driving motor, I had to remove the turntable of the the little crane.

Now my question to you is, did you combine any LEGO set with the NXT? Or did you see some nice combinations on the web? Leave a comment here with a link to the robot and I'll start a new thread in the forums if there is enough interest.
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