Vu Meter ( Arduino )

Schematic :



Code :

int timp = 10; 

int song = 10  ;

int val  = 0 ;

void setup() {

  for (int i=2;i<=13;i++)

  {

  pinMode (i, OUTPUT);

  }

  Serial.begin(9600);

}

void loop() {

    delay(timp);

    val = analogRead(A0);

    Serial.print("Valoare audio: ");

    Serial.println(val);

  

  if ( (song *1)  < val){

    digitalWrite (13 ,HIGH);} 

  else {

    digitalWrite (13 ,LOW);}

  

  if ( (song *2)  < val) {

    digitalWrite (12 ,HIGH);} 

  else {

    digitalWrite (12 ,LOW);}

    

  if ( (song *3)  < val) {

    digitalWrite (11 ,HIGH);} 

  else {

    digitalWrite (11 ,LOW);}

    

  if ( (song *4)  < val) {

    digitalWrite (10 ,HIGH);} 

  else {

    digitalWrite (10 ,LOW);}

    

  if ( (song *5)  < val) {

    digitalWrite (9  ,HIGH);} 

  else {

    digitalWrite (9  ,LOW);}

    

  if ( (song *6)  < val) {

    digitalWrite (8  ,HIGH);} 

  else {

    digitalWrite (8  ,LOW);}

    

  if ( (song *7)  < val) {

    digitalWrite (7  ,HIGH);} 

  else {

    digitalWrite (7  ,LOW);}

    

  if ( (song *8)  < val) {

    digitalWrite (6  ,HIGH);} 

  else {

    digitalWrite (6  ,LOW);}

    

  if ( (song *9)  < val) {

    digitalWrite (5  ,HIGH);} 

  else {

    digitalWrite (5  ,LOW);}

    

  if ( (song *10) < val) {

    digitalWrite (4  ,HIGH);} 

  else {

    digitalWrite (4  ,LOW);}

    

  if ( (song *11) < val) {

    digitalWrite (3  ,HIGH);} 

  else {

    digitalWrite (3  ,LOW);}

    

  if ( (song *12) < val) {

    digitalWrite (2  ,HIGH);} 

  else {

    digitalWrite (2  ,LOW);}

  

} // end loop