Presentation for the IT-Seminar 2011 @KNORD (Copenhagen - Denmark) CC: By-Noncomercial-SA David Fernández Carlota Martel José Manuel Gómez

1. Lego-NXT
An Introduction
Presented by:
David Fernández
Carlota Martel
José Manuel Gómez

2. License
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3. Table of Contents
• Introduction to Lego Mindstorms
• Programming in a Graphical Environment:
• NXT-G
• Programming in a Textual Environment:
• NXC

4. -Introduction to
Lego Mindstorms-

5. Programmable robotics toys

6. Evolution
http://www.flickr.com/photos/55524309@N05/5377715421

7. First steps
• MIT & Lego
• Investigations on how children learn
• MIT Programmable Brick
• Symour Papert

8. First steps
• Design
• Easy for new users and powerful for the
“experts”
• Many diferent shapes
• Simplicity
• Black box
• Learn how to program
• Observe the children in the lab

9. RCX (1998)
• 8-bit microcontroller
• 32K of RAM
• IR communication
• 3 sensor input ports
• 3 motor output ports
• Display
• RCXCode / Robolab
Image: Wikimedia Commons

10. NXT (2006)
• Replaces RCX
• Firmware (OSS)
• SDK, HDK, BDK
• 4 sensors
• 3 motors
• LCD display
• NXT-G
Image: Wikimedia Commons

11. NXT 2.0 (2009)
• Same brick as 1.0
• Sound editor
• Image editor
• 1 Color Sensor RGB
• 2 Touch sensors
• 1 Ultrasonic sensor
• 3 servo motors
• Bluetooth communication

12. Hardware

13. The brick
Lego Mindstorms NXT Hardware Developer Kit

14. Sensors
Touch Ultrasound
Light Sound

15. Education
http://www.flickr.com/photos/ianus/279779053/

16. • Robotics
• Programming
• Concurrency
• AI

17. http://www.flickr.com/photos/tambako/2473970479/
VISUAL

18. Projects
http://www.flickr.com/photos/sk8geek/4636413499

19. Electric Guitar
http://www.nxtprograms.com/guitar/index.html

21. Ball Hunter
http://www.nxtprograms.com/guitar/index.html

26. Competitions

28. • Robot Game
• Acomplish missions
• Project
• Explore a real problem
• Develope an inovative solution

29. Programming
environments

30. Some of them
• Ada • BricxCC
• NXT-G • NXTGCC
• RobotC • ruby-nxt
• leJOS NXJ • Robotics.NXT
• MATLAB • ...

31. Some of them
• Ada • BricxCC
• NXT-G • NXTGCC
• RobotC • ruby-nxt
• leJOS NXJ • Robotics.NXT
• MATLAB • ...

32. Some of them
• Ada • BricxCC
• NXT-G • NXTGCC
• RobotC • ruby-nxt
• leJOS NXJ • Robotics.NXT
• MATLAB • ...

33. -Programming in a
Graphical Environment-

34. Workspace
3 2
1
6
4
9
8
7
5

35. Common Blocks

36. DEMO

37. -Programming in a
Textual Environment-
NXC

38. Bricx Command
Center

40. Bricx Command
Center

41. Bricx Command
Center

42. Bricx Command
Center
NBC

44. Variables

45. Control Elements

46. Tasks, subroutines and macros

47. Subroutines (ii)

48. Accessing to the sensors

49. Controlling the Servo motors (i)

50. Controlling the Servo motors (ii)

51. Parallelism (i)

52. Parallelism (ii)

53. Communication (i)

54. Communication (ii)

55. Making some music (i)

56. Making some music (ii)

57. Bricx Command
Center

58. NXT-G vs. NXC
Features NXT-G NXC
Language Graphic Not eXactly C
Write programs Write fast
Advantage
fast programs
Speed (loops/min) 762 4285
Memory (bytes) 10704 1428

59. Questions?

60. http://campusvirtual.uem.es
IT-Seminar
http://www.slideshare.net/davidfm http://www.flickr.com/photos/wwworks/4759535950/