int led = A3;
int pot = A2;
int buz = 4;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(buz, OUTPUT);

  Serial.begin(115200);
  pinMode(pot, INPUT);
}

void loop() {
  int val = analogRead(pot);

  int pwm = map(val, 0, 1023, 0, 225);
  int fr = pwm * 2;
  Serial.println(pwm);
  analogWrite(led, pwm);
  analogWrite(led, pwm);
  tone(buz, fr);
  
delay(200);
}