int buzzer=13;
int potPin=A5;
int potVolt;
float buzzFreq;
void setup() {
  // put your setup code here, to run once:
  pinMode(buzzer, OUTPUT);
  pinMode(potPin, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  //Serial.println(buzzFreq);
  potVolt=analogRead(potPin);
  buzzFreq=potVolt/1023.*10000;
  //buzzFreq=map(potVolt,0, 1023,0,10000);
  digitalWrite(buzzer,HIGH);
  delayMicroseconds(buzzFreq);
  
  digitalWrite(buzzer, LOW);
  delayMicroseconds(buzzFreq);
}