#define POTENTIOMETER_PIN 35
#define LED_PIN 26
void setup(){
  Serial.begin(9600);
  pinMode(LED_PIN, OUTPUT);
}
void loop(){
  int analogValue = analogRead(POTENTIOMETER_PIN);
  int brightness = map(analogValue, 0, 4095, 0, 255);
  analogWrite(LED_PIN, brightness);
  Serial.print("Analog value = ");
  Serial.print(analogValue);
  Serial.print(" => brightness =");
  Serial.print(brightness);
  delay(100);
}