Day 1: (Aug 27) Welcome and Arduino Introduction

Notes for 2018-08-27. See also the Fall 2018 Calendar.

Agenda

1. Welcome.
   • What is IDeATe?
   • What is Physical Computing?
   • Why did the course change name?
   • Project focus: Pittsburgh Children’s Museum
   • Unspoken prerequisites.
2. Administrative
   • Enrollment and waitlist.
     • Course site: https://courses.ideate.cmu.edu/16-223
     • Weekend trips and child clearances.
     • 16-223-F18 Canvas.
     • Name tags and photos.
     • Attendance and tardiness policies.
   • Resources.
     • Card access.
     • Physical Computing Lab use and abuse.
     • We are sharing the room with four other classes (see IDeATe PhysComp Lab Calendar).
     • Office hours: tentatively Wed 11:30-1:30 in the lab.
     • IDeATe Computing Virtual Cluster.
3. Assignments
   • If needed: due 8/29: Fire Extinguisher Use, Part 1
   • If needed: sign up ASAP for Fire Extinguisher Use, Part 2
   • PA child clearances. See Child Clearances.
4. In-class
   1. Brief introduction to the Arduino (in 16-223 slides Drive folder)
   2. Each person pick up an Arduino, USB cable, cluster laptop, breadboard, speaker, IRF540, and a few jumper wires.
   3. Crash course in Arduino basics.
   4. Write an Arduino sketch to play tones in sequence to create a siren. For now, it is easiest to use tone() and delay() inside loop().
   5. Related exercises: Exercise: Arduino Introduction, Exercise: Coding, Compiling, Deploying, Exercise: Unipolar Drivers
   6. If time permits: rewrite your sketch without using delay(), then add a simultaneous fast-blink on the LED. For ideas, see Exercise: Event-Loop Programming
   7. At the end of class, please return the Arduinos and other components.

Lecture code samples

// generate tones on a speaker on pin 5
void setup()
{
  tone(5, 440);
}
void loop()
{
  delay(1000);
  noTone(5);

  delay(1000);
  tone(5, 660);

  delay(1000);
  tone(5, 440);
}

void setup()
{ 
  pinMode(5, OUTPUT);
}
void loop()
{
  long now = micros();
  bool square1 = (now % 2274) < 1136;
  bool square2 = (now % 1516) < 758;
  digitalWrite(5, square1 ^ square2);
}