01 Digital/Analogue INPUT/OUTPUT

// 1) Coding

int led_pin = 11;
int input_value;
int brightness;

void setup(){
  pinMode(led_pin, OUTPUT);
}

void loop(){
  input_value = analogRead(A0);
  brightness = map(input_value, 0, 1023, 0, 255);
  analogWrite(led_pin, brightness);
}

// 2) Coding

int led_pin = 11;
int input_value;
int brightness;

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

void loop(){
  input_value = analogRead(A0);
  brightness = map(input_value, 0, 1023, 0, 255);
  analogWrite(led_pin, brightness);
  Serial.println("input_value : " + String(input_value) + " , brightness : " +     String(brightness));
}