Arduino SOS Program

SOS.ino

/*
  SOS
  Sends SOS in morse code on the Arduino board.
  For more information see http://en.wikipedia.org/wiki/Morse_code
 
  Copyright 2012 Justin Dearing.
 */

int dotDur = 125;
int dashDur = dotDur * 3;
int wordPause = dotDur * 7;

void setup() {                
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards:
  pinMode(13, OUTPUT);     
}

void loop() {
  dot(dotDur);
  dot(dotDur);
  dot(dashDur);
  
  dash(dotDur);
  dash(dotDur);
  dash(dashDur);
  
  dot(dotDur);
  dot(dotDur);
  dot(wordPause);
}

void dash(int pauseDur) {
  digitalWrite(13, HIGH);   // set the LED on
  delay(dashDur);
  digitalWrite(13, LOW);    // set the LED off
  delay(pauseDur);
}

void dot(int pauseDur) {
  digitalWrite(13, HIGH);   // set the LED on
  delay(dotDur);            // wait for a second
  digitalWrite(13, LOW);    // set the LED off
  delay(pauseDur);
}