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Microprocessors Tutorial 1: Arduino Basics

Microprocessors Tutorial 1: Arduino Basics. Agenda. 1. Arduino Hardware 2. Arduino Software 3. MAKE: Blink 4. Electronics 5. MAKE: LED control 6. Analog 7. MAKE: Volume control 8. Links. 14 Digital Pins (6 PWM). USB. Power. Arduino Hardware. Reset button. ATMega 328. 6 Analog Pins.

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Microprocessors Tutorial 1: Arduino Basics

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

  4. 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 Arduino Software • Menu bar: set device, port, find examples

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

  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!

  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

  8. MAKE: LED control • 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. +5v to pin Analog • Digital: 0-1, On/Off • LEDs, switches • digitalRead(), digitalWrite() • Analog: 0-1023 • Potentiometer, sensor, motors • AnalogRead(), analogWrite() Potentiometer: variable resistance

  10. MAKE: Volume Indicator • Hardware • Add more LEDs, each going to a different pin • Connect potentiometer, center connection to pin

  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

  12. Useful Links • Arduino Examples • http://arduino.cc/en/Tutorial/HomePage • MAKE projects • http://makezine.com/arduino/ • http://makezine.com/category/electronics/arduino/?post_type=projects • Adafruit ?

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

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