// 🛠 Fifth Arduino Program: Control LED Brightness using a Potentiometer
// 👉 Concepts introduced: analogRead(), analogWrite(), Pulse Width Modulation (PWM)

int ledPin = 9;   // PWM-enabled LED pin
int potPin = A0;  // Potentiometer connected to Analog Pin A0

void setup() {
  pinMode(ledPin, OUTPUT);  
  Serial.begin(9600);  // Start Serial Monitor
}

void loop() {
  int potValue = analogRead(potPin);  // 1️⃣ Read potentiometer value (0-1023)
  int brightness = map(potValue, 0, 1023, 0, 255);  // 2️⃣ Scale to 0-255

  analogWrite(ledPin, brightness);  // 3️⃣ Adjust LED brightness
  Serial.print("Brightness: ");
  Serial.println(brightness);

  delay(100);
}