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Open source hardware
Fostering creativity
The work presented in this document/ workshop is supported by the
European Commi...
Scientix 2 | Dr. Francisco Pérez García
24/11/2015 | Barcelona
Scientix webinar: Open source hardware
2
Webinar contents
1...
Scientix 2 | Dr. Francisco Pérez García
24/11/2015 | Barcelona
Scientix webinar: Open source hardware
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Coding to prepare ...
Scientix 2 | Dr. Francisco Pérez García
24/11/2015 | Barcelona
Scientix webinar: Open source hardware
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Internet
Zettabyte...
Scientix 2 | Dr. Francisco Pérez García
24/11/2015 | Barcelona
Scientix webinar: Open source hardware
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Nature Physics 11,...
Scientix 2 | Dr. Francisco Pérez García
24/11/2015 | Barcelona
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PASSIVE TECHNOLOGY...
Scientix 2 | Dr. Francisco Pérez García
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CREATIVE STUDENTS
Scientix 2 | Dr. Francisco Pérez García
24/11/2015 | Barcelona
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USING OLD HARDWARE...
Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Prototyping
Actua...
Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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What is open sour...
Scientix 2 | Dr. Francisco Pérez García
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What is open sour...
Scientix 2 | Dr. Francisco Pérez García
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What is open sour...
Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Open source hardw...
Scientix 2 | Dr. Francisco Pérez García
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Open source hardw...
Scientix 2 | Dr. Francisco Pérez García
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How? Some example...
Scientix 2 | Dr. Francisco Pérez García
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Genuino 101 (avai...
Scientix 2 | Dr. Francisco Pérez García
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Raspberry Pi 2
Scientix 2 | Dr. Francisco Pérez García
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Intel Edison
Scientix 2 | Dr. Francisco Pérez García
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Arduino Uno Genui...
Scientix 2 | Dr. Francisco Pérez García
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BEAGLEBONE BLACK ...
Scientix 2 | Dr. Francisco Pérez García
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OTHER HARDWARE
AL...
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Open Source Hardw...
Scientix 2 | Dr. Francisco Pérez García
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Arduino Uno
Scientix 2 | Dr. Francisco Pérez García
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ESPLORA
SOME ARDU...
Scientix 2 | Dr. Francisco Pérez García
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Build your Arduin...
Scientix 2 | Dr. Francisco Pérez García
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ATMEGA328P-PU Mic...
Scientix 2 | Dr. Francisco Pérez García
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Arduino on breadb...
Scientix 2 | Dr. Francisco Pérez García
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http://www.arduin...
Scientix 2 | Dr. Francisco Pérez García
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Arduino Language
...
Scientix 2 | Dr. Francisco Pérez García
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/*
Blink
Turns on...
Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Materials for LDR...
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Pulse width modul...
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RGB LED BLINKING
Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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SOURCE CODE: RGB-...
Scientix 2 | Dr. Francisco Pérez García
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void loop() {
val...
Scientix 2 | Dr. Francisco Pérez García
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else if((valueLDR...
Scientix 2 | Dr. Francisco Pérez García
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else if((valueLDR...
Scientix 2 | Dr. Francisco Pérez García
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Scientix webinar: Open source hardware
46http://www.tecnolo...
Scientix 2 | Dr. Francisco Pérez García
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+
EMPOWERING ARDU...
Scientix 2 | Dr. Francisco Pérez García
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Augmented reality...
Scientix 2 | Dr. Francisco Pérez García
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ARDUINO: FACE REC...
Scientix 2 | Dr. Francisco Pérez García
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ARDUINO: AUGMENTE...
Scientix 2 | Dr. Francisco Pérez García
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ARDUINO: POLLUTAN...
Scientix 2 | Dr. Francisco Pérez García
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ARDUINO & POLLUTA...
Scientix 2 | Dr. Francisco Pérez García
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http://www.tecnol...
Scientix 2 | Dr. Francisco Pérez García
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POLLUTANT MEASURE...
Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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Scientix 2 | Dr. Francisco Pérez García
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PROGRAMMING SMART...
Scientix 2 | Dr. Francisco Pérez García
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Scientix webinar: Open source hardware
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Erasmus + project...
Scientix 2 | Dr. Francisco Pérez García
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Approximate prici...
Scientix 2 | Dr. Francisco Pérez García
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Resources
www.ard...
Scientix 2 | Dr. Francisco Pérez García
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Thank you very mu...
Scientix 2 | Dr. Francisco Pérez García
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Scientix webinar: Open source hardware
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Teacher of Techno...
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Open source hardware

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Open source hardware

  1. 1. Open source hardware Fostering creativity The work presented in this document/ workshop is supported by the European Commission’s FP7 programme – project Scientix 2 (Grant agreement N. 337250), coordinated by European Schoolnet (EUN). The content of this document/workshop is the sole responsibility of the organizer and it does not represent the opinion of the European Commission, and the Commission is not responsible for any use that might be made of information contained herein. Dr. Francisco Pérez García 24/11/2015
  2. 2. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 2 Webinar contents 1. Passive students or creative students? 2. What is open source hardware? 3. Types of open source hardware 4. Arduino: from a blinking LED to a project with LDR (analog input) controlling RGB-LED (analog output) 5. Creating open source hardware (Arduino type) 6. Fostering creativity: Empowering Arduino with Processing libraries (computer vision, augmented reality, text to speech, voice recognition, etc)
  3. 3. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 3 Coding to prepare students for the future
  4. 4. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 4 Internet Zettabyte Find problems Different solutions Skills and competences Teachers Students Politicians
  5. 5. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 5 Nature Physics 11, 369–373 (2015)
  6. 6. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 6 PASSIVE TECHNOLOGY USERS
  7. 7. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 7 CREATIVE STUDENTS
  8. 8. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 8 USING OLD HARDWARE TO PROGRAM NEW OPEN HARDWARE DEVICES
  9. 9. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 9
  10. 10. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 10 Prototyping Actually there is not a manual on how to do things but a reference collection of samples that people can modify and combine with other examples to learn about the logic of the programme and the board. It’s a “hands on” way of working in which even junk becomes a source for learning and building prototypes. The reuse of material from other fields is an other big knowledge and material source. Learning how to do things by looking how other things work and can be hacked. Circuit bending and patching are two key words in this learning school.
  11. 11. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 11
  12. 12. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 12 What is open source hardware?
  13. 13. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 13 What is open source hardware? Open source is a development model promoting universal access via a free license to a product's design or blueprint, and universal redistribution of that design or blueprint, including subsequent improvements to it by anyone. Open-source hardware (OSH) consists of physical artifacts of technology designed and offered by the open design movement. FOSH (free and open source hardware) can be use with free and open- source software (FOSS) in education
  14. 14. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 14 What is open source hardware?
  15. 15. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 15
  16. 16. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 16 Open source hardware in the classroom The Hacker Attitude for our students Five things taken from Eric S. Raymond’s How To Become a Hacker: 1. The world is full of fascinating problems waiting to be solved. 2. No problem should ever have to be solved twice. 3. Boredom and drudgery are evil. 4. Freedom is good. 5. Attitude is no substitute for competence.
  17. 17. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 17 Open source hardware in the classroom “Computer science is no more about computers than astronomy is about telescopes”. Edsger Dijkstra “The computer revolution hasn’t happened yet”. Allan Kay “Debugging is the essence of intellectual activity”. Seymour Pappert
  18. 18. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 18 How? Some examples of available open source hardware for the classroom
  19. 19. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 19 Genuino 101 (available in 2016)
  20. 20. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 20 Raspberry Pi 2
  21. 21. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 21 Intel Edison
  22. 22. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 22 Arduino Uno Genuino 101 Raspberry Pi 2 Intel Edison + Arduino Chip 8 bits 16 MHz 0.02 Mb 32 bits 32 MHz 0.20 Mb 32 bits 700 MHz 1 Gb 32 bits, intel, 500 MHz 500 Mb GPIO Inputs and outputs 14 6 analog inputs 6 PWM outputs 14 40 40 Extras No (available shields) Accelerometer Bluetooth Ethernet HDMI, SD Wi-fi, bluetooth Programming languages Arduino Processing C Arduino Processing Python IDLE Scratch Processing 3.0.1+ (Nov. 2015) Arduino Intel XDK Price 20 € Aprox. 30€ (2016) 49 € 90 €
  23. 23. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 23 BEAGLEBONE BLACK SHARKS COVE (MICROSOFT) MINNOWBOARD MAX (MICROSOFT) GROVE PI + SENSORS OTHER HARDWARE ALTERNATIVES
  24. 24. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 24 OTHER HARDWARE ALTERNATIVES
  25. 25. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 25 Open Source Hardware, you can make your own board, or buy one. Cheap, easily available. Open Source Software. Very widespread, many projects openly available. Extra HW (shields) available. ARDUINO UNO
  26. 26. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 26 Arduino Uno
  27. 27. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 27 ESPLORA SOME ARDUINO BOARDS ETHERNET
  28. 28. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 28 Build your Arduino board
  29. 29. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 29 ATMEGA328P-PU Microcontrolle​r With ARDUINO UNO R3 Bootloader VIDEO BUILD YOUR ARDUINO: https://www.youtube.com/watch?v=sNIMCdVOHOM Solderless Prototype Breadboard 170 Tie- points Arduino Shield 16MHz 16.000MHz, HZ HC-49S Inline Feet Passive Crystal Oscillator Resistors and capacitors
  30. 30. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 30 Arduino on breadboard
  31. 31. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 31 http://www.arduino.cc
  32. 32. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 32 Arduino Language C like syntax, but simplified Abstracts the pin naming to numbers Trades efficience for ease of use Easy to learn, yet powerful Lots of example code Easy to reuse C-code from other projects Libraries can be written in C++ Lots of libraries available
  33. 33. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 33 /* Blink Turns on an LED on for one second, then off for one second, repeatedly. This example code is based on example code that is in the public domain. */ void setup() { // initialize the digital pin as an output. // Pin 13 has an LED connected on most Arduino boards: pinMode(13, OUTPUT); } void loop() { digitalWrite(13, HIGH); // set the LED on delay(1000); // wait for a second digitalWrite(13, LOW); // set the LED offdelay(1000); // wait for a second }
  34. 34. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 34
  35. 35. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 35 Materials for LDR and RGB-LED using Arduino - 4 resistor 220 Ω - 1 LDR sensor - 1 RGB LED - 1 potenciometer - 1 Arduino Uno - Wires, USB wire and breadboard
  36. 36. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 36
  37. 37. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 37 Pulse width modulation
  38. 38. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 38 RGB LED BLINKING
  39. 39. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 39
  40. 40. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 40
  41. 41. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 41
  42. 42. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 42 SOURCE CODE: RGB-LED colour change depending on light level int valueLDR = 1; int ledRed = 9; int ledGreen=10; int ledBlue=11; int pinLDR = 1; //3 outputs for each RGB colour: red, green and blue void setup(){ pinMode(ledRed, OUTPUT); pinMode(ledGreen, OUTPUT); pinMode(ledBlue, OUTPUT); analogReference(EXTERNAL); } /*First we define the variable name as integer and it is assigned a value*/ /*The setup function comes before the loop function, and everything happens inside the curly backets*/ /*Outputs are declared in setup, this is done by usingthe pinMode function, in this particular example we declare numbers 9, 10 and 11 as OUTPUT (in capital letters)*/ // or /*Comment*/ can be anywhere, do not affect code, help others
  43. 43. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 43 void loop() { valueLDR = analogRead(pinLDR); if(valueLDR >= 1023){ digitalWrite(ledRed, 128); digitalWrite(ledGreen, 0); digitalWrite(ledBlue, 0); // digitalWrite to obtain different colours } else if((valueLDR >= 959) & (valueLDR < 1023)){ digitalWrite(ledRed, 255); digitalWrite(ledGreen, 0); digitalWrite(ledBlue, 0); } The “void” in the header is what the function will return (or spit out) when it happens, in this case it returns nothing so it is void
  44. 44. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 44 else if((valueLDR >= 895) & (valueLDR < 959)){ digitalWrite(ledRed, 255); digitalWrite(ledGreen, 128); digitalWrite(ledBlue, 0);} else if((valueLDR >= 831) & (valueLDR < 895)){ digitalWrite(ledRed, 255); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 0);} else if((valueLDR >= 767) & (valueLDR < 831)){ digitalWrite(ledRed, 255); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 128);} else if((valueLDR >= 703) & (valueLDR < 767)){ digitalWrite(ledRed, 128); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 255); } else if((valueLDR >= 639) & (valueLDR < 703)){ digitalWrite(ledRed, 128); digitalWrite(ledGreen, 128); digitalWrite(ledBlue, 255);} else if((valueLDR >= 575) & (valueLDR < 639)){ digitalWrite(ledRed, 0); digitalWrite(ledGreen, 128); digitalWrite(ledBlue, 255);} else if((valueLDR >= 511) & (valueLDR < 575)){ digitalWrite(ledRed, 0); digitalWrite(ledGreen, 0); digitalWrite(ledBlue, 255);} else if((valueLDR >= 447) & (valueLDR < 511)){ digitalWrite(ledRed, 0); digitalWrite(ledGreen, 0); digitalWrite(ledBlue, 128); } else if((valueLDR >= 383) & (valueLDR < 447)){ digitalWrite(ledRed, 0); digitalWrite(ledGreen, 128); digitalWrite(ledBlue, 0);} else if((valueLDR >= 319) & (valueLDR < 383)){ digitalWrite(ledRed, 0); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 0);} else if((valueLDR >= 255) & (valueLDR < 319)){ digitalWrite(ledRed, 128); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 0);} else if((valueLDR >= 191) & (valueLDR < 255)){ digitalWrite(ledRed, 0); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 128); }
  45. 45. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 45 else if((valueLDR >= 127) & (valueLDR < 191)) { digitalWrite(ledRed, 128); digitalWrite(ledGreen, 255); digitalWrite(ledBlue, 128);} else if((valueLDR >= 63) & (valueLDR < 127)) { digitalWrite(ledRed, 128); digitalWrite(ledGreen, 128); digitalWrite(ledBlue, 128);} else if((valueLDR >=0) & (valueLDR < 63)){ digitalWrite(ledRed, 55); digitalWrite(ledGreen, 55); digitalWrite(ledBlue, 55); } else { digitalWrite(ledRed, 0); digitalWrite(ledGreen, 0); digitalWrite(ledBlue, 0); } } void color(int red, int green, int blue) { analogWrite(ledRed, 255-red); analogWrite(ledGreen, 255-green); analogWrite(ledBlue, 255-blue); // PWM for every colour
  46. 46. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 46http://www.tecnologies.net/?page_id=190
  47. 47. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 47 + EMPOWERING ARDUINO WITH PROCESSING LIBRARIES http://www.processing.org http://www.arduino.cc
  48. 48. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 48 Augmented reality (NyAR4psg library) Computer vision (OpenCV library) Loading 3D objects (OBJLoader library) QR codes (QR library) Database communication (SMS, SQL libraries) Machine learning (Gnet library) Arduino library Games (pBox2D library) Lego robots (NTXcomm library)
  49. 49. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 49 ARDUINO: FACE RECOGNITION http://www.tecnologies.net/?page_id=565
  50. 50. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 50 ARDUINO: AUGMENTED REALITY http://www.tecnologies.net/?page_id=641
  51. 51. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 51 ARDUINO: POLLUTANTS http://www.tecnologies.net/?page_id=639
  52. 52. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 52 ARDUINO & POLLUTANTS
  53. 53. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 53 http://www.tecnologies.net/?page_id=639
  54. 54. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 54 POLLUTANT MEASUREMENT USING ARDUINO (PETROL vs DIESEL, OLD CARS vs NEW CARS and at different rpm)
  55. 55. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 55
  56. 56. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 56
  57. 57. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 57
  58. 58. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 58 PROGRAMMING SMART DRONES
  59. 59. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 59 Erasmus + project: ARt (2015-2017): Arduino technology and art http://arteducation.eu
  60. 60. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 60 Approximate pricing Arduino Uno......................................... 25€ Arduino Uno clone (or from components) 5€ Raspberry Pi 2........................................49€ Resistors, LEDs, LDR...................around 5€ Breadboard.............................................10€ MQ sensors (CO, CH4, etc)..............5€ each MG811 (CO2 sensor)..............................50€ Arduino for Android.................................50€ Sometimes very high import taxes from China!
  61. 61. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 61 Resources www.arduino.cc www.processing.org www.tecnologies.net
  62. 62. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 62 Thank you very much for your attention Questions? Dr. Francisco Pérez García - Institut Pompeu Fabra
  63. 63. Scientix 2 | Dr. Francisco Pérez García 24/11/2015 | Barcelona Scientix webinar: Open source hardware 63 Teacher of Technology // Institut Pompeu Fabra University Professor // Universitat de Barcelona Scientix Deputy Ambassador (Spain) // European Schoolnet Dr. Francisco Pérez García (perez@ub.edu) http://www.tecnologies.net More information

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