#define potPin      34
#define buzzerPin   12

int AValue = 0;
int changeFlag = 0;
void setup() {
  Serial.begin(115200);
  pinMode(potPin,     INPUT);
  pinMode(buzzerPin,  OUTPUT);
  digitalWrite(buzzerPin, LOW);
  delay(1000);
}

void loop() {
  AValue = analogRead(potPin);
  Serial.print("Value:");
  Serial.println(AValue);

  if (AValue > 0) {
    changeFlag = 1;
  }
  if (changeFlag == 1) {
    digitalWrite(buzzerPin, HIGH);
  }
  //delay(500);
}