• Min. age: 7 yo.
• Measurments: 380x380x110 mm.
• Weight: 2,3 kg.
• Power source: 6 AA batteries.

• 'Brick' - NXT 'Brick' with 32-bit processor,
• 3 servomotors with embedded rotation sensor,
• sound sensor,
• ultrasonic sensor,
• touch sensor,
• light sensor,
• 577 LEGO TECHNICS blocks,
• programming environment,
• manuals,
• testpad,
• cables.

NXT Brick is hearth of Mindstorms robot. Because of it, the communication with robot, programming and controlling is possible.

• 32-bit ARM7 Mikrocontroler
• 256 Kb FLASH, 64 Kb RAM
• 8-bit AVR Microcontroller
• 4 Kb FLASH, 512 B RAM
• Servomotors' ports: A, B, C
• Sensors' ports: 1, 2, 3, 4
• USB port (12 Mbit/s)
• 8 kHz speaker, 8-bit channel, sample rate 2-16 KHz
• Buttons (menu service)
• LCD display, 100 x 64 px
• Bluetooth wireless communication (Bluetooth Class II V2.0 compliant)
• 6 AA batteries

• http://mindstorms.lego.com/Overview/The_NXT.aspx

Communication with Brick is possible with:

• USB
• Bluetooth

With both methods it's possible to:

• load Brick programs
• download data (eg. data collected by robot) from Brick

• NXT Bluetooth

In each kit there are 3 servomotors:

• useful to control revs
• with revenue sensors, useful to precise tracking of propeller shaft position

• NXT Servomotors
• detailed construction and characteristic of servomotor

• microphone with possibility of sound intensity measurement
• returns sound intensity in [dB] and in [dBA]
• range to 90 dB
• percentage scale of sound intensity

• http://mindstorms.lego.com/Overview/Sound_Sensor.aspx

It can be used to:

• measure distance from barrier (cm and inches)
• detect objects
• detect movement

Range: 0-255 cm, precision +/- 3 cm.

How it works?: Distance is calculated on the basis of time of sound wave return to robot after barrier bounce. (The same rule is used by bats and submarines.)

Notices:

• If there are more then 1 ultrasonic sensor in the same room, there can exist some interferences and the sensor can work not correct.
• Curved surfaces (eg. spheres) are difficult to detect.

• http://mindstorms.lego.com/Overview/Ultrasonic_Sensor.aspx

• detects toutches with the orange button
• can differentiate 3 states of touch:
  • pressed
  • bumped
  • released
• additional: 3 buttons on NXT Brick (left, right, center) can be set as touch detectors

• http://mindstorms.lego.com/Overview/Touch_Sensor.aspx

• useful to differentiate lightness and darkness
• returns the light intensity
• measure the light intensity reflected from colorful surfaces (indirect color detection)

• http://mindstorms.lego.com/Overview/Light_Sensor.aspx

• Dimensions: 90 cm x 60 cm
• Used to test robots
• Content:
  • colorful fields to calibrate color sensor
  • area limited by black line to test robots moving inside
  • ruler to check indications of distance sensors
  • field to analise robot's rotation

• LEGO NXT Overview
• NXT at Wikipedia
• http://www.philohome.com/nxt.htm