Challenge 7 - Buzzer

Challenge Name: most annoying thing ever

author: kyle

credit: i reference the code off newinnovators,ca

difficulty level: 4

time to complete: 7 minutes

Challenge description: Make the buzzer buzz a sequence of high notes


























answer:
int speakerPin = 9;
int length = 15;
char notes[] = "ccggaagffeeddc ";
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
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[] = { 900, 1319, 1000, 354, 976, 836, 385, 656 };
   for (int i = 0; i < 8; i++)  
   {
     if (names[i] == note)  
     {
       playTone(tones[i], duration);
     }
   }
 }
 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);  
   }
 }