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Ρrogrammable robotics

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Lego Mindstorms NXT is a programmable robotics kit released by Lego in late July 2006. It replaces the first-generation Lego Mindstorms kit, which was called the Robotics Invention System. It comes with the NXT-G programming software, but a variety of unofficial languages exist, such as NXC, NBC, leJOS NXJ, and RobotC.


The main component in the kit is a brick-shaped computer called the NXT Intelligent Brick. It can take input from up to four sensors and control up to three motors, via RJ12 cables, very similar to but incompatible with RJ11 phone cords. The brick has a 100x64 pixel monochrome LCD display and four buttons that can be used to navigate a user interface using hierarchical menus. It also has a speaker and can play sound files at sampling rates up to 8 kHz. Power is supplied by 6 AA (1.5 V each) batteries in the consumer version of the kit and by a Li-Ion rechargeable battery and charger in the educational version


Lego has released the firmware for the NXT Intelligent Brick as Open Source.[4]

Several developer kits are available that contain documentation for the NXT:

  • Software Developer Kit (SDK), includes information on host USB drivers, executable file format, and bytecode reference
  • Hardware Developer Kit (HDK), includes documentation and schematics for the NXT brick and sensors
  • Bluetooth Developer Kit (BDK), documents the protocols used for Bluetooth communications