Paso 6: Hacer el flash de LEDs con sonido
Se necesita:- Cable USB
Es lo mismo que el código anterior, pero hemos añadido el LED vuelva como en la función de abrir y cerrar. Se encenderá cuando la nota se reproduce y apagado cuando se detiene la nota
// TONES ========================================== // Start by defining the relationship between // note, period, & frequency. #define C 2100 #define D 1870 #define E 1670 #define f 1580 // Does not seem to like capital F #define G 1400 // Define a special note, 'R', to represent a rest #define R 0 // SETUP ============================================ // Set up speaker on a PWM pin (digital 9, 10 or 11) int speakerOut = 9; int led = 13; // Do we want debugging on serial out? 1 for yes, 0 for no int DEBUG = 1; void setup() { pinMode(speakerOut, OUTPUT); pinMode(led, OUTPUT); if (DEBUG) { Serial.begin(9600); // Set serial out if we want debugging } } // MELODY and TIMING ======================================= // melody[] is an array of notes, accompanied by beats[], // which sets each note's relative length (higher #, longer note) int melody[] = {E, E, E,R, E, E, E,R, E, G, C, D, E, R, f, f, f,f, f, E, E,E, E, D ,D,E, D, R, G ,R, E, E, E,R, E, E, E,R, E, G, C, D, E, R, f, f, f,f, f, E, E, E, G,G, f, D, C,R }; int MAX_COUNT = sizeof(melody) / 2; // Melody length, for looping. // Set overall tempo long tempo = 10000; // Set length of pause between notes int pause = 1000; // Loop variable to increase Rest length int rest_count = 100; //<-BLETCHEROUS HACK; See NOTES // Initialize core variables int tone_ = 0; int beat = 0; long duration = 0; // PLAY TONE ============================================== // Pulse the speaker to play a tone for a particular duration void playTone() { long elapsed_time = 0; if (tone_ > 0) { // if this isn't a Rest beat, while the tone has // played less long than 'duration', pulse speaker HIGH and LOW digitalWrite(led, HIGH); while (elapsed_time < duration) { digitalWrite(speakerOut,HIGH); delayMicroseconds(tone_ / 2); // DOWN digitalWrite(speakerOut, LOW); delayMicroseconds(tone_ / 2); // Keep track of how long we pulsed elapsed_time += (tone_); } digitalWrite(led, LOW); } else { // Rest beat; loop times delay for (int j = 0; j < rest_count; j++) { // See NOTE on rest_count delayMicroseconds(duration); } } } // LET THE WILD RUMPUS BEGIN ============================= void loop() { for (int i=0; i<MAX_COUNT; i++) { tone_ = melody[i]; beat = 50; duration = beat * tempo; // Set up timing playTone(); // A pause between notes... delayMicroseconds(pause); } } 
