Arduino mio

//programma: theremin

//******* pin ********

//******* declare ******** 
int X=0;//declares the variable 
const int pin_altoparlante=11;//the longer leg is the positive and goes to pin, the other to GND
const int pin_trigger=9;//pin actuator ultrasuoniE
const int pin_receiver=8;//pin sensorultrasuoniR
int duration=0;//declares the variable 
int distance=0;//declares the variable

//********** setup **********  
   void setup(){ 
	
	pinMode(pin_altoparlante,OUTPUT); 
	pinMode(pin_trigger,OUTPUT); 
	pinMode(pin_receiver,INPUT); 
	 Serial.begin(9600);      // Initialize the serial  
}

//********** loop ********** 
 void loop() { 
	
	digitalWrite(pin_trigger,HIGH); // HIGH/LOW is the voltage 5V/0V)
	delay(10);//attendi 
	digitalWrite(pin_trigger,LOW); // HIGH/LOW is the voltage 5V/0V)
	duration=pulseIn(pin_receiver,HIGH);// Reads a pulse on a pin
	distanza=duration*0.1720; 
	Serial.print("_distanza_(mm)=");//writes on the serial 
	Serial.print(distanza);//writes on the serial 
	delay(100);//attendi 
	X=distance*10; 
	Serial.print("_-_-_-_frequenza=");//writes on the serial 
	Serial.println(X);//writes on the serial 
	tone(pin_altoparlante,X,100);

};//end loop

//powered by "Arduinomio" (C) 
//www.mastrohora.it

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