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: Volume control
8. Links

3. Arduino Hardware Reset button 14 Digital Pins (6 PWM) Power USB
ATMega 328
6 Analog Pins

4. 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

5. MAKE: Blink Using built in LED, so no further electronics needed!
Connect Arduino
Windows driver found?
Correct port?
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. 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

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

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

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

10. 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

11. 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!

12. 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!

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