NXT
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. more...
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The base kit ships in two versions: The Retail Version and the Education Base Set.. These can be used to compete in FIRST Lego League competitions.
NXT Brick
The main component in the kit is a brick-shaped computer called the NXT brick. It can take input from up to four sensors and control up to three motors, via cables very similar to but incompatible with phone cords. The brick has a 100x64 pixel greyscale 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 16 kHz. Power is supplied by 6 AA batteries in the consumer version of the kit and by a rechargeable battery and charger in the educational version.
Technical specifications
32-bit ARM7 main microprocessor;
256 KB flash memory;
64 KB RAM;
8 bit Atmel AVR microcontroller @4 MHz;
4 KB flash memory;
512 Bytes RAM;
100×64 pixel LCD matrix display;
Can be programmed using Windows or Mac OS (NBC/NXC supports Linux as well);
Users create a program with new software, powered by LabVIEW from National Instruments;
A single USB 2.0 port;
Bluetooth (Class II) wireless connectivity, to transfer programs to the NXT wirelessly or offer ways to control robots remotely (through mobile phones and possibly by PDA's);
4 input ports, 6-wire cable digital platform (One port includes a IEC 61158 Fieldbus Type 4/EN 50 170 (P-NET) compliant expansion port for future use);
3 output ports, 6-wire cable digital platform;
Digital Wire Interface, allowing for third-party development of external devices;
Firmware and developer kits
Lego has released the firmware for the NXT Intelligent Brick as Open Source.
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;
Programming
Very simple programs can be written using the menu on the NXT. More complicated programs and sound files can be downloaded using a USB port or wirelessly using Bluetooth. Files can also be copied between two NXT bricks wirelessly, and some mobile phones can be used as a remote control. Up to three NXT bricks can communicate simultaneously via Bluetooth when user created programs are run.
Read more at Wikipedia.org
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