Drive

int ds1 = A2; //pin that indicates the existence of the CD inside the drive if HIGH and its inexistance otherwise
int d1 = A3;  //pin connected to the wire that if connected to ground ejects the CD


void setup() {
   Serial.begin(9600);
  pinMode(ds1, INPUT);
  pinMode(d1, OUTPUT);
  while((!analogRead(ds1))) //if the CD isn't inside the drive wait
  {}
}

void loop() {
                analogWrite(d1,0); //eject CD
                delay(500);
                while(!analogRead(ds1)) //if the CD isn't inside the drive wait
                {}
                delay(1000);


}