#define OUT 11
bool trigger;
int input3 = digitalRead(A3);

void setup() {
 pinMode(OUT, OUTPUT);
 Serial.begin(9600);

}

void loop() {
Serial.println(input3);

if(input3) {
  Serial.println("trigger");
  tone(OUT, 550);
  }

else {
  noTone(OUT);
  Serial.println("no");
  }
  delay(1000);
}