/*
  sonarToBuzz
  
  Takes distance data to from an ultrasonic sonar sensor and converts 
  it to and audible frequency through a buzzer.
  
  The circuit:
  ultrasonic sonar sensor connected to positive, negative and analog 1.
  buzzer from digital 2 to ground.
  
  
*/


int sonarPin = 1;                // Ultrasound signal pin ANALOG-1
int buzzPin = 2;                 // buzz connected to DIGITAL-2


int val = 0;                    //takes sonar value and creates an audible frequency
int ultrasoundValue = 0;        //only used for serial read


void setup() {
// Serial.begin(9600);                 // Sets the baud rate to 9600
 pinMode(buzzPin, OUTPUT);          // sets the DIGITAL-2 pin as output  
 
}

void loop() {
val = 0;

pinMode(sonarPin, INPUT); // Switch signalpin ANALOG-1 to input
val = (analogRead(sonarPin)*10) + 800; // Append signal value to val, ranged to be an audible tone.


digitalWrite(buzzPin, HIGH);   // sets the buzz on
 delayMicroseconds(val);                  // waits, proportional to the sensed value
 digitalWrite(buzzPin, LOW);    // sets the buzz off
 delayMicroseconds(val);                  // waits, proportional to the sensed value



/* Writing out values to the serial port
* -------------------------------------------------------------------


ultrasoundValue = val; // Append analog read to ultrasoundValue

Serial.print("Distance in CM= "); // Example identifier for the sensor
Serial.print(ultrasoundValue);
Serial.println();
*/


}