int LedMerah = 3;
int Jeda = 500;
int Potensiometer = A0;
int nilai;
int tegangan;

void setup() {
  Serial.begin(9600);
  pinMode(LedMerah, OUTPUT);
  pinMode(Potensiometer, INPUT);
}

void loop() {
  nilai = analogRead(Potensiometer);
  Serial.println(tegangan);
  tegangan = (255. / 1023) * nilai;
  analogWrite(LedMerah, tegangan);
}