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

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

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
-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
Connect LED output from Arduino to ground,
pin->220ohm -> LED+ ->GND
Connect button input from 5v to Arduino,
5v ->button ->10kohm ->GND
before res ->pin
Dont need arduino for this, but for educational purposes

9. MAKE: LED control Software Outside: declare 2 pins In setup():
Set direction using pinMode(pin, IN/OUTPUT)
In loop():
Read button state using digitalRead(pin)
If button is on, control LEDs using digitalWrite(led, HIGH/LOW)

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

11. 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

12. MAKE: Volume Indicator
Software
Add LED pin variables and set direction
Add pot pin, analog pin don't need direciton
Read pot value
Scale from (0-1024) to number of LEDs it using map(variable, origStart, origEnd, scaledStart, scaledEnd)
Turn LEDs on/off depending on value of pot. The higher the pot value the more LEDs should be on.
We will b using only 4 leds i think
Imagine replacing input to a microphone, or headphone jack!

13. Parts Links RobotShop (Canada) http://www.robotshop.com/ca/
Adafruit (NYC)
ABRA (montreal)
DigiKey (flat shipping)
We will b using only 4 leds i think
Imagine replacing input to a microphone, or headphone jack!

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