Thursday, June 13, 2013

Lego Mindstorms NXT 2.0

Lego Mindstorms NXT 2.0 is the second set from LEGO's Lego Mindstorms series, launched on August 5, 2009 at the Lego Shop in the U.S. The set contains 619 pieces, including a new sensor that can detect colors. Its consist of NXT Intelligent Brick, Sensor, and Actuator.

NXT Intelligent Brick

  • 32-bit Atmel AT91SAM7S256 main microcontroller (256 KB flash memory, 64 KB RAM)
  • 8-bit Atmel ATmega48 microcontroller @ 4 MHz (4 KB flash memory, 512 Bytes RAM)
  • 100x64 pixel LCD Screen
  • four 6-pin input ports (ports 1-4)
  • three 6-pin output ports (ports A-C)
  • USB Port
  • Bluetooth Class II V2.0
  • Loudspeaker - 8 kHz sound quality, 8-bit resolution, 2-16 kHz sample rate
  • Four Push Buttons
Orange button: On/Enter
Light grey arrows: moving left and right in the NXT menu
Dark grey button: Clear/Go back
  • Powered by six AA batteries or the NXT Rechargeable DC Battery


Parts can be ordered separately. In the original kit, the sensors included are the Color, 2 Touch, and an Ultrasonic.
  • Color Sensor (9694), for detecting 6 different colors: blue, green, red, yellow, white, black
  • Light Sensor (9844), for detecting levels of light. (Included in first version, but in 2.0, replaced by Color Sensor.)
  • Touch Sensor (9843), a simple button that senses if something collided with it.
  • Ultrasonic Sensor (9846), for measuring distances using inaudible sound waves.
  • Sound Sensor (9845), for basic "hearing". Capable of measuring volume, but cannot record actual sounds.
  • Compass Sensor (MS1034), for detecting direction. Has a built-in calibrator to reduce interference from other magnetic items. (Not included in basic kit, for advanced users.)
  • Accelerometer Sensor (MS1040), for sensing which general direction it's moving in. Also can measure G-force. (Not included in basic kit, for advanced users.)
  • RF-ID Sensor, for communication between multiple robots. (Not included in basic kit, for VERY advanced users.)
  • Rotation Sensor (Built into Servo Motors), for measuring how far it has turned. This is unique, because it measures based on the turn of the gears inside, rather than the motor itself. Useful for robots that will coast and act based on distance rolled.
  • Bluetooth communication (Built into "Intelligent brick"), for communication with other devices. Can be used mid-program, or for downloading new programs and data.


  • Servo Motor (9842)
  • It can shine light in red, green, or blue. (Normally it senses color by using the lamp in a setting and reading the reflected light levels. It uses the same lamp here for other uses.)

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