// ReadAnalogAverage 

// For audio input testing

// Prints min, max, and average to the serial monitor

// Should work with a line-level or headphone-level signal

// Typically the input is biased at Vcc/2 for a reading of ~512 with no signal

// Reads input A0

​

// Global Variables

int Min;

int Max;

int Analog;

unsigned long Sum;

unsigned long Average;    //Should be equal to the bias.

void setup()

{ 

  Serial.begin(9600);

  delay(100);       //"Stabilization time".   Probably not necessary

}

//Main Loop

void loop() 

{

Min = 1023;     //Initilize/reset to limit

Max = 0;        //Initilize/reset to limit

Sum = 0;        //Initialize/reset

​

//Take 1000 readings, find min, max, and average.  This loop takes about 100ms.

for (int i = 0; i < 1000; i++)

{

  Analog = analogRead(A0); 

​

  Sum = Sum + Analog;   //Sum for averaging

  if (Analog < Min)

    Min = Analog; 

​

  if (Analog > Max)

    Max = Analog;        

}

​

Average = (Sum/1000);

// print results

Serial.print ( " Min = ");

Serial.print (Min);

​

Serial.print ( " Max = ");

Serial.print (Max);

​

Serial.print (" Average = ");

Serial.println (Average);

​

//  delay(500);    //Optional delay for readability

}  //End