1. Microprocessors Tutorial 1: Arduino Basics

2. Agenda 1. Arduino Hardware 2. Arduino Software 3. MAKE: Blink
4. Electronics
5. MAKE: LED control
6. Analog
7. MAKE: Servo Control
8. MAKE: Volume control
9. Links

3. Arduino Hardware Reset button 14 Digital Pins (6 PWM) USB ATMega 328
Power
USB
Voltage Regulator
ATMega 328
SDA/SCL
6 Analog Pins
Powering the board

5. Arduino Software Menu bar: set device, port, find examples Code:
setup(), set pin direction pinMode(pin, IN/OUTPUT)
loop(), set pin value with digitalWrite(led, HIGH/LOW)
Or get pin value with digitalRead(pin)
Buttons:
verify and upload code
-set device under tools> boards
-set port before uploading (in tools)
-sketches r for LATER, write your own code!
Code for BLINK uses DIGITAL methods
Connect arduino, if windows not found find driver in DEVICE MANAGER, see port, then upload

6. MAKE: Blink Using built in LED, so no further electronics needed!
Connect Arduino
Windows driver found?
Correct port?
Upload code from Example
-set device under tools> boards
-set port before uploading (in tools)
-sketches r for LATER, write your own code!
Code for BLINK uses DIGITAL methods
Connect arduino, if windows not found find driver in DEVICE MANAGER, see port, then upload

7. Electronics Breadboard: vertical connections, horizontal buses
LEDs: polarized, long == +
Resistor: Color-coded. Need one for LED
Push Button: completes circuit only while pushed. Use a pull down resistor!
LED res: ohms law 5v , 20mA
Pulldown: floating when no tpressed

8. MAKE: LED control Hardware Connect buses to bread board, 5v and GND
2. Connect LED,
pin->220ohm -> LED+ ->GND
3. Connect button,
5v ->button ->10kohm ->GND
before res ->pin
Dont need arduino for this, but for educational purposes

9. MAKE: LED control Software
Declare 2 pins outside and set direction in setup()
Read button state
If button is on, write desired output to LEDs

10. MAKE: LED control CHALLENGES: (╯°□°)╯︵ ┻━┻
Ask the user for a natural number between1-6 and then turn that LED on
Hint: you can get input via Serial.read()
LED’s should flash repeatedly after pressing the button, and should stop after the second press
Hint: Boolean
Red LEDs start ON, after holding the button for 3 seconds, the green LEDs turn on
Ask for two inputs and Make a simple adder
Hint:
Add the two numbers together
Convert the result from integer to binary
The largest number you can show with 6 LEDs in binary is = 63 in decimal

11. Analog Digital: 0-1, On/Off LEDs, switches
digitalRead(), digitalWrite()
Analog:
Potentiometer, sensor, motors
AnalogRead(), analogWrite()
to pin
+5v
Potentiometer: variable resistance

12. MAKE: Servo Controller
Connect the Servo (Don’t forget to import the servo library and make an instance of the Servo class)
Connect the Potentiometer
Read the Value from the potentiometer
Map that value to a number
between 0 to 180
Take the new range (0-180) and
use it as an input for the servo to
rotate it
Hint: use attach(), write()

13. Things to Consider:
NEVER connect a motor directly to the Arduino (Why?)
Use a switch (transistor) or a relay to control
ALWAYS refer to the datasheet of the components
When in doubt…..GOOGLE!

14. MAKE: Volume Indicator
Hardware
Add more LEDs, each going to a different pin
Connect potentiometer, center connection to pin
We will b using only 4 leds i think

15. MAKE: Volume Indicator
Software
Add LED pin variables and set direction
Add pot pin, analog pin don't need direciton
Get pot value
Scale it using
map(number, origStart, origEnd, scaledStart, scaledEnd)
If pot level is higher than LED indicator, write desired output to LED
We will b using only 4 leds i think
Imagine replacing input to a microphone, or headphone jack!

16. Useful Links Arduino Examples http://arduino.cc/en/Tutorial/HomePage
MAKE projects
Adafruit
We will b using only 4 leds i think
Imagine replacing input to a microphone, or headphone jack!

17. academics@ieee.concordia.ca ieee.concordia.ca
Questions? Comments? Suggestions?
ieee.concordia.ca