Arduino Challenge 7: Buzzer (Make Your Own Challenge)

Challenge Name: Buzzer & Light Sensor

Author: Christina He

Credit: New Innovators.com Lab 7

Time to Complete: Approximately 10 min

Difficulty Level: Level 1

Challenge Description: Make a program that the buzzer will sing "Ode To Joy".

Answer:

Code

int speakerPin = 9;
int length = 15;
char notes[] = "eefggfedccdeeddeefggfedccdedcc ";
int beats[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1 , 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1 ,1 };
int tempo = 300;
void playTone(int tone, int duration)
{
  for (long i = 0; i < duration * 1000L; i += tone * 2)
  {
    digitalWrite(speakerPin, HIGH);
    delayMicroseconds(tone);
    digitalWrite(speakerPin, LOW);
    delayMicroseconds(tone);
  }
}
void playNote(char note, int duration)
{
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
  for (int i = 0; i < 8; i++)
  {
     if (names[i] == note)
    {
      playTone(tones[i], duration);
      delay(2000);
    }
  }
}
void setup()
{
  pinMode(speakerPin, OUTPUT);
}
void loop()
{
  for (int i = 0; i < length; i++)
  {
    if (notes[i] == ' ')
    {
      delay(beats[i] * tempo);
    }
    else
    {
      playNote(notes[i], beats[i] * tempo);
     }
    delay(tempo / 2);
  }

}

Visual Answer