// LED Brightness Control + Buzzer sound + Push Button with Arduino Uno

// Connect a potentiometer to analog pin A0
const int potPin = A0; 
const int ledPin = 9;
const int pushButtonPin = 2;
const int buzzerPin = 8;
// Set time to 1s
const int timer = 1000;

void setup() {
  pinMode(potPin, INPUT);
  pinMode(pushButtonPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // Read button state
  int buttonState = digitalRead(pushButtonPin);
  // 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);
  // Map potentiometer value to Buzzer loudness (0-500) 
  int loudness = map(potValue, 0, 1023, 0, 500);

  // If the button state is HIGH (pressed)
  if (buttonState == HIGH) {
    // Set LED brightness
    analogWrite(ledPin, brightness);
    // Set Buzzer loudness
    tone(buzzerPin, loudness, timer);
  } else {
    // If the button is not pressed, turn off LED and buzzer
    digitalWrite(ledPin, LOW);
    noTone(buzzerPin);
  }
}