Slides for Arduino workshop for Science Camp 2013

1. Build cool
stuff with
Arduino
William Hooi
Wendell Wong
Centre for Research & Applied Learning in
Sciences
Science Centre Singapore
Introductory
Workshop
13 Dec 2013
facebook.com/CRADLEsci

2. What are microcontrollers?
•
•
•
•
Really small computers
With limited hardware resources
Programmable
Can be used to do anything imaginable

3. Doing good for humanity
Fukushima nuclear
disaster
DIY radiation detector built by Tokyo
Hackerspace, connected live to the Internet

4. Arduino as an Interative Device

5. Terminology
• Pins
– A leg on a microcontroller with some specific
function (e.g. Power pin, ground pin, digital input
pin, analog output pin)
Digital pins
Arduino has 13 digital pins that can be used
as input or output
Arduino has 6 analog pins that can only be
used as input
Analog pins

6. Using the breadboard
Horizontal tracks
for power
vertical tracks for
components

7. Connecting circuit

8. Program structure
Arduino use a
language similar to
C++
void setup( )
{
}
void loop( )
{
}

9. Where to start
Determine your
input
Output device:
Determine your
output and device
Input device:
Choose a device
Lightdependent
resistor
(LDR)
Light
emitting
diode (LED)
Piezo
buzzer

10. Reading from serial monitor
Verify
Upload
Serial monitor

11. Activity 1: Blink an LED
longer leg
330

12. Activity 1: Blink an LED
Assign pin 13 as LED pin
Assign LED pin as output
Turn LED pin on
Wait for 0.5s
Turn Led pin off
Wait for 0.5s

13. Recap
pinMode (pin number, OUTPUT/INPUT);
digitalWrite(pin number, HIGH/LOW);
delay(milliseconds);

14. Activity 2: ..and beep a buzzer
Piezo
buzzer
330

15. Activity 2: ..and beep a buzzer
Assign pin 8 as tone pin
Play a tone on tone pin with 200 Hz and 250ms
Play a tone on tone pin with 600 Hz and 250ms

16. Use arrays for longer tunes

17. Challenge
Build a circuit and write the Arduino
sketch that will enable you to blink 4
LEDs intermittently & play a musical
tone

18. Controlling RGB

19. Activity 4: Light sensing
adafruit.com

20. Activity 4: Display light reading – Serial

21. Controlling servo motor

22. Activity 5: Controlling servo motor
GND
pin 0
+5V

23. Control servo with trimmer pot
#include <Servo.h>

24. Recap
#include <Servo.h>
Servo myservo;
myservo.attach (pin number);
myservo.write (angle);

25. Reading from serial monitor
#include <Servo.h>
create a servo object called ‘myservo’
Start serial comm at 9600bps
Assign servo to servo pin 9
Read analog pin 0, pass value to potLevel
Convert range to 180 divisions
Display something on serial monitor
Tell servo to rotate

26. Replace pot with light sensor
10k

27. 10k

28. Ideas for projects

29. Thank you
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