// LED Brightness Control for Arduino Uno

// Connect a potentiometer to analog pin A0
const int potPin = A0; 
const int ledPin = 9;

void setup() {
  pinMode(potPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Read potentiometer value (0-1023)
  int potValue = analogRead(potPin);
  // Map potentiometer value to LED brightness (0-255)   
  int brightness = map(potValue, 0, 1023, 0, 255); 
  
   // Set LED brightness
  analogWrite(ledPin, brightness);
}