If you have a LEGO ® MINDSTORMS ® NXT robotics kit, then this site provides free building instructions and downloadable programs for lots of fun projects. Projects designed for the young and young at heart! Only one NXT kit is required, no extra parts are needed. Full building instructions with color photographs.

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Scorpion This is the code for a Lego Mindstorms NXT 2.0 scorpion. Behaviour The code is very simple.

I was only interested in the sting mechanism so this is the only behaviour this program implements (it has no legs). The UltraSound sensor should be plugged into input 1 and the sting's motor into output A. At the moment, it assumes that the sting starts in the closed position (I may add a setup step that pulls the sting in first at some point).

Construction My scorpion is based on. I've ditched much of the design, in particular the legs. Unfortunately, these instructions require pieces that don't appear to come in the default NXT 2.0 kit. My kit only contains two 15-length pieces, which is less than the sting mechanism requires.

I got around this by scaling down the size of the sting by replacing 15-length pieces with 13, 13 with 11 and so on. Usage You'll need to build a suitable machine out of the Mindstorms kit. You can then connect it to your computer using a USB cable. If you haven't done so already, get set up with the following steps: • • Then, with the nbc command set up and on your path, run the following from the scorpion directory. Nbc -d scorpion.nxc This will compile the program and send it to the connected NXT device.