Teach, Learn and Make with Raspberry Pi - Estonia seminar

Exploring teaching computing and informatics through physical computing with the Raspberry Pi

Transcript

1. Teach, Learn and Make
   with Raspberry Pi
   Ben Nuttall
   Raspberry Pi Foundation
   UK Charity 1129409
   

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2. Raspberry Pi Foundation
   ●
   Registered UK charity 1129409
   ●
   Founded in 2009 to aid computing education
   ●
   On general sale since 2012, available to all worldwide
   – Sold to education, industry and hobbyists
   – Sold 6 million to date
   ●
   Free learning resources for makers and educators
   ●
   Free teacher training - Picademy (currently UK, soon USA)
   

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3. Ben Nuttall
   ●
   Education Developer Advocate
   at the Raspberry Pi Foundation
   – Software & project development
   – Learning resources & teacher
   training
   – Outreach
   ●
   Hobbyist turned employee
   ●
   Based in Cambridge, UK
   ●
   @ben_nuttall on Twitter
   

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4. Raspberry Pi
   ●
   Sonic Pi
   ●
   Python
   ●
   Physical computing
   ●
   Minecraft: Pi Edition
   ●
   Picamera
   ●
   Astro Pi
   

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5. Sonic Pi
   ●
   Sound synthesiser for creating
   music
   ●
   Audible computing
   ●
   Uses simple syntax text-based
   programming language Ruby
   ●
   Used for compositions and live
   coding performances
   ●
   Introduce computing concepts
   through music
   ●
   Created especially for education
   

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6. Python
   ●
   Powerful extensible
   programming language
   ●
   Easy to read and write
   ●
   Make software, games, GUIs,
   websites, robots and more
   ●
   Ideal for physical computing
   ●
   Extensive library of additional
   modules for Raspberry Pi
   hardware
   ●
   Recommended for education
   

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7. Physical computing
   ●
   Flashy lights
   ●
   Motors & robots
   ●
   Photo & video
   ●
   Sensors
   ●
   Internet of Things
   ●
   Engaging and empowering
   

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8. 3V3 = always on
   

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9. GPIO = user controllable
   

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10. Flash LED with Python
    from RPi import GPIO
    from time import sleep
    GPIO.setmode(GPIO.BCM)
    led = 2
    GPIO.setup(led, GPIO.OUT)
    while True:
    GPIO.output(led, True)
    sleep(1)
    GPIO.output(led, False)
    sleep(1)
    

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11. Traffic Lights
    from RPi import GPIO
    from time import sleep
    GPIO.setmode(GPIO.BCM)
    red = 9
    yellow = 10
    green = 11
    leds = [red, yellow, green]
    for led in leds:
    GPIO.setup(led, GPIO.OUT)
    GPIO.output(green, True)
    GPIO.output(yellow, False)
    GPIO.output(red, False)
    

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12. Traffic Lights
    while True:
    sleep(10)
    GPIO.output(green, False)
    GPIO.output(yellow, True)
    sleep(1)
    GPIO.output(yellow, False)
    GPIO.output(red, True)
    sleep(10)
    GPIO.output(yellow, True)
    sleep(1)
    GPIO.output(green, True)
    GPIO.output(yellow, False)
    GPIO.output(red, False)
    

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13. An alternative approach
    class LED(object):
    def __init__(self, pin):
    self.pin = pin
    GPIO.setup(pin, GPIO.OUT)
    def on(self):
    GPIO.output(self.pin, True)
    def off(self):
    GPIO.output(self.pin, False)
    red = LED(9)
    yellow = LED(10)
    green = LED(11)
    

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14. An alternative approach
    green.on()
    yellow.off()
    red.off()
    while True:
    sleep(10)
    green.off()
    yellow.on()
    sleep(1)
    yellow.off()
    red.on()
    sleep(10)
    yellow.on()
    sleep(1)
    green.on()
    yellow.off()
    red.off()
    

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15. Traffic Lights
    green.on()
    yellow.off()
    red.off()
    sleep(10)
    

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16. Traffic Lights
    green.off()
    yellow.on()
    sleep(1)
    

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17. Traffic Lights
    yellow.off()
    red.on()
    sleep(10)
    

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18. Traffic Lights
    yellow.on()
    sleep(1)
    

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19. Traffic Lights
    green.on()
    yellow.off()
    red.off()
    

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20. Minecraft: Pi Edition
    ●
    Free version of Minecraft on
    Raspberry Pi
    ●
    Python programming
    interface
    ●
    Learn Python by building
    things and making games in
    Minecraft
    ●
    Creative computing
    

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21. Flowers
    from mcpi.minecraft import Minecraft
    from time import sleep
    mc = Minecraft.create()
    flower = 38
    while True:
    x, y, z = mc.player.getPos()
    mc.setBlock(x, y, z, flower)
    sleep(0.1)
    

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22. Planting flowers
    grass = 2
    flower = 38
    while True:
    x, y, z = mc.player.getPos() # player position (x, y, z)
    block_beneath = mc.getBlock(x, y­1, z) # block ID
    if block_beneath == grass:
    mc.setBlock(x, y, z, flower)
    else:
    mc.setBlock(x, y­1, z, grass)
    sleep(0.1)
    

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23. Picamera
    ●
    Official Raspberry Pi camera
    module
    ●
    Command line interface for
    basic use
    ●
    Python programming
    interface for projects
    ●
    Still pictures, video, time-
    lapse
    

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24. Camera preview
    ●
    Open Terminal window
    ●
    raspistill -k
    

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25. Python – take a selfie
    from picamera import PiCamera
    from time import sleep
    with picamera.PiCamera() as camera:
    camera.start_preview()
    sleep(5)
    camera.capture('/home/pi/image.jpg')
    camera.stop_preview()
    

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26. Python – stop motion
    with picamera.PiCamera() as camera:
    camera.start_preview()
    frame = 1
    while True:
    next = input('Press Enter to continue...')
    camera.capture('/home/pi/animation/frame%03d.jpg' % frame)
    frame += 1
    

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27. Astro Pi
    

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28. Sense HAT
    ●
    8x8 RGB LED matrix
    ●
    Mini joystick
    ●
    Gyroscope
    ●
    Accelerometer
    ●
    Magnetometer
    ●
    Temperature sensor
    ●
    Barometric pressure sensor
    ●
    Humidity sensor
    

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29. Sense HAT - Python
    from sense_hat import SenseHat
    sense = SenseHat()
    sense.show_message('Hello world!')
    

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30. More examples
    https://github.com/RPi­Distro/python­sense­
    hat/tree/master/examples
    https://github.com/bennuttall/sense­hat­examples
    

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31. Resources
    https://www.raspberrypi.org/resources/
    

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32. Teach, Learn and Make
    with Raspberry Pi
    Ben Nuttall
    Raspberry Pi Foundation
    UK Charity 1129409
    

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