// Task 3: PWM using Potentiometer and LED

int potPin = A0;   // Potentiometer connected to analog pin A0
int ledPin = 6;    // LED connected to PWM pin 6
int potValue = 0;  // Variable to store analog value
int pwmValue = 0;  // Variable to store mapped PWM value

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

void loop() {
  // Step 1: Read analog value from potentiometer (0–1023)
  potValue = analogRead(potPin);
  
  // Step 2: Map potentiometer value to PWM range (0–255)
  pwmValue = map(potValue, 0, 1023, 0, 255);
  
  // Step 3: Write PWM value to LED
  analogWrite(ledPin, pwmValue);
  
  // Step 4: Calculate and print duty cycle percentage
  float dutyCycle = (pwmValue / 255.0) * 100.0;
  Serial.print("ADC Value: ");
  Serial.print(potValue);
  Serial.print(" | PWM Value: ");
  Serial.print(pwmValue);
  Serial.print(" | Duty Cycle: ");
  Serial.print(dutyCycle, 1);
  Serial.println("%");

  delay(200);  // Small delay for readability
}