int pot_pin = A0;
int pot_val;

int led_pin = 3;

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

void loop() {
  pot_val = analogRead(pot_pin);
  Serial.print(pot_val);
  Serial.print(" - ");

  // pot sends 1023 (2^10)
  // led needs 255 (2^8)

  // 0-255
  // analogWrite(led_pin, pot_val/4);

  // 55-122
  // 0-1023 -> 55-122
  int led_val = map(pot_val, 0, 1023, 55, 122);
  analogWrite(led_pin, led_val);

  int newPot_val = constrain(pot_val, 200, 600);
  Serial.println(newPot_val);
}