Arduino Controlled LED Music Light Show by Mark

Materials (Pictured):

Arduino Uno

Spectrum Shield

Stackable Headers

Soldering Iron

Male to Male Pins

Headphone Cable (Audio Cable)

Materials (Not Pictured):

Breadboard

Single LED Lights

Resistors

Step 1: Solder You Spectrum Shield to Pin Headers

Because of my lack of stackable pin headers, I had to solder my Spectrum Shield onto a dud board.

Step 2: Attached the Spectrum Shield to the Uno

Step 3: Wiring

Step 4: Code

// *** Initializing the Spectrum Shield pins and the reading the frequency from SparkFun *** \\

// https://learn.sparkfun.com/tutorials/spectrum-shi...

// Mark

#define STROBE 4

#define RESET 6

#define DC_One A0

#define DC_Two A1

#define LED_LIGHT_TREBLE 9

#define LED_LIGHT_MID 8

#define LED_LIGHT_BASS 7

int LEDLights[] = {7,8,9};

int frequenciesOne[7];

int frequenciesTwo[7];

void setup() {

Serial.begin(9600);

pinMode(STROBE, OUTPUT);

pinMode(RESET, OUTPUT);

pinMode(DC_One, INPUT);

pinMode(DC_Two, INPUT);

digitalWrite(STROBE, HIGH);

digitalWrite(RESET, HIGH);

pinMode(LED_LIGHT_TREBLE, OUTPUT);

pinMode(LED_LIGHT_MID, OUTPUT);

pinMode(LED_LIGHT_BASS, OUTPUT);

digitalWrite(STROBE, LOW); delay(1);

digitalWrite(RESET, HIGH); delay(1);

digitalWrite(STROBE, HIGH); delay(1);

digitalWrite(STROBE, LOW); delay(1);

digitalWrite(RESET, LOW);

}

//this function will make the LED dim once the Parallax Sound Impact Sensor sends a 1 signal, and then return to it’s //original brightness.

void loop() {

Read_Frequencies();

Graph_Frequencies();

delay(50);

}

/*************Pull frquencies from Spectrum Shield****************/

void Read_Frequencies() {

//Read frequencies for each band

for (int freqAmp = 0; freqAmp < 7; freqAmp++) {

frequenciesOne[freqAmp] = analogRead(DC_One);

frequenciesTwo[freqAmp] = analogRead(DC_Two);

digitalWrite(STROBE, HIGH);

digitalWrite(STROBE, LOW);

}

}

void Graph_Frequencies() {

int theDelay = 20;

int bassThreshold = 150;

int midThreshold = 200;

int trebleThreshold = 200;

for(int i = 0; i < 7; i++) {

if (i == 0) {

if (frequenciesTwo[i] > bassThreshold) {

digitalWrite(LEDLights[0], HIGH);

} else if (frequenciesOne[i] > bassThreshold) {

digitalWrite(LEDLights[0], HIGH);

} else {

digitalWrite(LEDLights[0], LOW);

}

delay(theDelay);

digitalWrite(LEDLights[0], LOW);

}

if (i == 3) {

if (frequenciesTwo[i] > midThreshold) {

digitalWrite(LEDLights[1], HIGH);

} else if(frequenciesOne[i] > midThreshold) {

digitalWrite(LEDLights[1], HIGH);

} else {

digitalWrite(LEDLights[1], LOW);

}

delay(theDelay);

digitalWrite(LEDLights[1], LOW);

}

if (i == 6) {

if(frequenciesTwo[i] > trebleThreshold) {

digitalWrite(LEDLights[2], HIGH);

} else if(frequenciesOne[i] > trebleThreshold) {

digitalWrite(LEDLights[2], HIGH);

} else {

digitalWrite(LEDLights[2], LOW);

}

delay(theDelay);

digitalWrite(LEDLights[2], LOW);

}

}

}

Step 5: Add Phone and Play Music