Make LEDs blink in rhythm with music code

Question

Hello fellow Arduino users,

I have a code that plays the Popcorn song, feel free to use it or change it for yourself:

#include "pitches.h"

//The Pin for 8ohm speaker is 8....

int melody[] = {

NOTE_C6, NOTE_AS5, NOTE_C6, NOTE_G5, NOTE_DS5, NOTE_G5, NOTE_C5, 0,

NOTE_C6, NOTE_D6, NOTE_DS6, NOTE_D6, NOTE_DS6, NOTE_C6, NOTE_D6, NOTE_C6,

NOTE_D6, NOTE_AS5, NOTE_C6, NOTE_AS5, NOTE_C6, NOTE_G5, NOTE_C6, 0,

NOTE_C6, NOTE_AS5, NOTE_C6, NOTE_G5, NOTE_DS5, NOTE_G5, NOTE_C5, 0,

NOTE_C6, NOTE_D6, NOTE_DS6, NOTE_D6, NOTE_DS6, NOTE_C6, NOTE_D6, NOTE_C6,

NOTE_D6, NOTE_AS5, NOTE_C6, NOTE_AS5, NOTE_C6, NOTE_G5, NOTE_C6,

};

// note durations: 4 = quarter note, 8 = eighth note, etc.:

int noteDurations[] = {

4,4,4,4,4,4,4,4,

4,4,4,

4,4,4,4,4,4,4,4,

4,4,4,4,4,4

};

void setup() {

for (int thisNote = 0; thisNote < 64; thisNote++) {

int noteDuration = 900/noteDurations[thisNote];

tone(8, melody[thisNote],noteDuration);

int pauseBetweenNotes = noteDuration * 1;

delay(pauseBetweenNotes);

noTone(8);

}

void loop() {

}

I want to make the LEDs blink in rhythm with the beeps of my tiny Arduino "player"

I have an Arduino Mega 2560 R3

What can I add to my code to make one or more LEDs blink in rhythm with the music?

windsr · Answer

Have you seen this? http://www.jeremyblum.com/2011/12/25/tutorial-14-for-arduino-holiday-lights-and-sounds/ It's one of the tutorials sponsored by Element14.

billabott · Answer

Yes. Maybe. I don't know. Check this out and decide for yourself. http://dkc1.digikey.com/us/en/mkt/pulse.html the video demonstration is here: http://www.youtube.com/user/digikey?v=mLHws8nW3xc&feature=pyv&ad=6342218129&kw=led%20project

ntewinkel · Answer

Could you not just add a few functions to handle the lights simultaneously to the sounds?

I'm thinking like this, which turns on the LED whenever a sound is being made:

tone(8, melody[thisNote]); // don't specify duration here

light(13); // this is the built-in LED

delay(noteDuration);

noTone(8);

noLight(13);

int pauseBetweenNotes = noteDuration * 1;

delay(pauseBetweenNotes);

and then the funtion named light would just set the pin high to turn on the LED and noLight does the opposite:

void light(int led) {

digitalWrite(led, HIGH);

}

void noLight(int led) {

digitalWrite(led, LOW);

}

In setup you would also need to set the LED pins as output, maybe like this:

void setup() {

initLight(13); // initialize the LED to be ready for use

}

and then add the function for init:

void initLight(int led) {

pinMode(led, OUTPUT);

}

Hope that helps!

Cheers,

-Nico

donnacarter0103 · Answer

See this: https://forum.processing.org/two/discussion/3474/need-help-getting-leds-to-flash-to-music It gives you the solution for blinking LEDs in rhythm. I have also make a blog on making LEDs Flash to music using Arduino UNO board. If you need more information visit my article .

Make LEDs blink in rhythm with music code

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