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Play twinkle twinkle little star with arduino
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/* | |
Connections For this application; | |
Use Freeduino-RichBoard made by www.EmbeddedMarket.com | |
1. Connect Digital Pin 9 to Buz pin in Section 9 on Freeduino Board | |
2. Connect USB Cable | |
*/ | |
/* Melody | |
* (cleft) 2005 D. Cuartielles for K3 | |
* | |
* This example uses a piezo speaker to play melodies. It sends | |
* a square wave of the appropriate frequency to the piezo, generating | |
* the corresponding tone. | |
* | |
* The calculation of the tones is made following the mathematical | |
* operation: | |
* | |
* timeHigh = period / 2 = 1 / (2 * toneFrequency) | |
* | |
* where the different tones are described as in the table: | |
* | |
* note frequency period timeHigh | |
* c 261 Hz 3830 1915 | |
* d 294 Hz 3400 1700 | |
* e 329 Hz 3038 1519 | |
* f 349 Hz 2864 1432 | |
* g 392 Hz 2550 1275 | |
* a 440 Hz 2272 1136 | |
* b 493 Hz 2028 1014 | |
* C 523 Hz 1912 956 | |
* | |
* http://www.arduino.cc/en/Tutorial/Melody | |
*/ | |
int speakerPin = 11; | |
int length = 15; // the number of notes | |
//twinkle twinkle little star | |
char notes[] = "ccggaag ffeeddc ggffeed ggffeed ccggaag ffeeddc "; // 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) { | |
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 }; | |
// play the tone corresponding to the note name | |
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); // rest | |
} else { | |
playNote(notes[i], beats[i] * tempo); | |
} | |
// pause between notes | |
delay(tempo / 2); | |
} | |
} | |
can u explain the code plz.. as soon as possible... and if I have to make some different tone wher I have to change..
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Awesome