Plug it and Arduino can play melodies!
This is a small buzzer for the Sensor Shield. It creates different noises based on the different frequency of I/O toggling. All you need to do is to plug in the buzzer module to sensor shield, and tell the function which pin you'd like to use, the frequency you want to hear, and the duration to play that frequency.
Building interactive work is as easy as piling bricks, just plug it to our Buzzer Module with a buckled cable, and make it looks professional and neat.
Free buckled cable is included.
Example code to play melody:
int BuzzerPin = 9;
int length = 15; // the number of notes
char notes[] = "ccggaagffeeddc "; // a space represents a rest
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) <{br>
for (long i = 0; i < duration * 1000L; i += tone * 2) <{br>
digitalWrite(BuzzerPin, HIGH);
delayMicroseconds(tone);
digitalWrite(BuzzerPin, LOW);
delayMicroseconds(tone);
}
}
void playNote(char note, int duration) <{br>
char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
// play the tone corresponding to the note name
for (int i = 0; i < 8; i++) <{br>
if (names[i] == note) <{br>
playTone(tones[i], duration);
}
}
}
void setup() <{br>
pinMode(BuzzerPin, OUTPUT);
}
void loop() <{br>
for (int i = 0; i < length; i++) <{br>
if (notes[i] == ' ') <{br>
delay(beats[i] * tempo); // rest
} else <{br>
playNote(notes[i], beats[i] * tempo);
}
// pause between notes
delay(tempo / 2);
}
}
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