Arduino 3-LED Button Controller

A simple Arduino project that controls 3 LEDs using 3 push buttons with toggle functionality.

🔧 Features

• Independent Control: Each button controls its own LED
• Toggle Function: Press once to turn ON, press again to turn OFF
• Debouncing: Prevents multiple triggers from button bounce
• Clean Code: Array-based structure for easy modification

🛠️ Components Required

• 1x Arduino Uno
• 3x LEDs
• 3x Push Buttons
• 3x 220Ω Resistors (for LEDs)
• 3x 10kΩ Resistors (for buttons)
• Breadboard
• Jumper wires

📋 Circuit Connections

LEDs:

LED	Arduino Pin	Resistor	Connection
LED 1	Pin 13	220Ω	Pin 13 → LED+ → LED- → 220Ω → GND
LED 2	Pin 12	220Ω	Pin 12 → LED+ → LED- → 220Ω → GND
LED 3	Pin 11	220Ω	Pin 11 → LED+ → LED- → 220Ω → GND

Buttons:

Button	Arduino Pin	Pull-down Resistor
Button 1	Pin 2	10kΩ to GND
Button 2	Pin 3	10kΩ to GND
Button 3	Pin 4	10kΩ to GND

Button Wiring: 5V → Button → Arduino Pin + 10kΩ resistor to GND

🎮 How It Works

1. Press Button 1 → LED 1 toggles ON/OFF
2. Press Button 2 → LED 2 toggles ON/OFF
3. Press Button 3 → LED 3 toggles ON/OFF
4. Each LED operates independently
5. Multiple LEDs can be ON simultaneously

📁 Files

• led_button_controller.ino - Main Arduino code
• circuit_diagram.png - Wiring diagram
• demo_video.mp4 - Working demonstration

🚀 Quick Start

1. Wire the circuit according to the diagram
2. Upload the code to your Arduino
3. Press buttons to control LEDs
4. Enjoy your LED controller!

🎥 Demo

Click to watch the working demonstration

🔄 Code Features

• Debouncing algorithm prevents button bounce
• Array-based design for easy scaling
• Toggle functionality with state memory
• Clean, commented code for learning

📖 Learning Objectives

• Digital I/O control
• Button debouncing techniques
• State management
• Array usage in Arduino
• Circuit design basics

📄 License

Open source - feel free to use and modify