Arduino LED and LCD Display Circuit

#include <LiquidCrystal.h>

// Initialize the LCD display with the pins connected to Arduino
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

// Define the pins for the LED and the switch
const int ledPin = 13;
const int switchPin = 8;

bool ledState = false; // Initial state of the LED is off
bool lastSwitchState = HIGH; // Assume the switch is initially open (high level)

// Debouncing function
bool readSwitch() {
  bool currentSwitchState = digitalRead(switchPin);
  if (currentSwitchState != lastSwitchState) {
    // Wait for a while to let any bouncing stabilize
    delay(50);
    currentSwitchState = digitalRead(switchPin);
  }
  return currentSwitchState;
}

void setup() {
  // Set the LED pin as output mode
  pinMode(ledPin, OUTPUT);
  // Set the switch pin as input mode
  pinMode(switchPin, INPUT_PULLUP);
  
  // Initialize the LCD display
  lcd.begin(16, 2);
  // Display initial information
  displayStatus();
}

void loop() {
  // Read the switch state with debouncing
  bool currentSwitchState = readSwitch();
  
  // Check if the switch state has changed
  if (currentSwitchState != lastSwitchState) {
    ledState = !ledState; // Toggle the LED state
    digitalWrite(ledPin, ledState); // Update the LED state
    lastSwitchState = currentSwitchState; // Update the switch state
    displayStatus(); // Display the new state
  }
}

void displayStatus() {
  // Clear the display and set the cursor position
  lcd.clear();
  lcd.setCursor(0, 0);
  // Display the switch status
  lcd.print("Switch: ");
  lcd.print(lastSwitchState == HIGH ? "OFF" : "ON");
  // Display the LED status
  lcd.setCursor(0, 1);
  lcd.print("LED: ");
  lcd.print(ledState ? "ON" : "OFF");
}