About this course
✅ Project 01:
Title: Simple Security Alert System using Buzzer and LCD (non-I2C)
Overview:
This project uses a buzzer and an LCD to give sound and screen alerts. It's good for learning how simple security alerts work.
Parts Used:
Arduino Nano
Buzzer
16x2 LCD (non-I2C)
✅ Project 02:
Title: Simple Security Alert System using LCD, Buzzer, LEDs, and Keypad
Overview:
This project adds a keypad so you can arm or disarm the system using a passcode. Red and green LEDs show system status.
Parts Used:
Arduino Nano
Buzzer
16x2 LCD (non-I2C)
Red and Green LEDs
4x4 Keypad
📦 Main Parts Used in All Projects:
Arduino Nano
Buzzer
LEDs (Red, Green, RGB)
16x2 LCD (non-I2C)
4x4 Keypad
🏭 10 Real-Life Uses:
Home security
Office safety
Shops and stores
Warehouse alerts
School labs
Server rooms
ATMs and lockers
Hospital storage rooms
Construction sites
Smart lockers
🌟 Advantages of Learning the Conceptual Way:
💡 Better Understanding: Helps you know how and why things work, not just what to do.
🛠️ Easy Troubleshooting: If something doesn’t work, you can fix it by understanding the concept.
🧠 Stronger Memory: Concepts stay longer in your mind compared to just memorizing steps.
🧩 Creative Thinking: Encourages you to build and modify your own systems with new ideas.
🚀 Real-World Readiness: Prepares you for advanced projects and real industry problems.
📚 Foundation for Learning More: Once concepts are clear, learning sensors, IoT, and automation becomes easier.
Prerequisites
FAQ
Comments (0)
Title: Simple Security Alert System using Buzzer and LCD (non-I2C)
Overview:
This project uses a buzzer and an LCD to give sound and screen alerts. It's good for learning how simple security alerts work.
Parts Used:
Arduino Nano
Buzzer
16x2 LCD (non-I2C)
How It Works:
1. System Initialization:
On power-up, the LCD displays “Smart Alarm” for 2 seconds.
All pins are initialized: LCD, keypad, RGB, buzzer.
2. Keypad Input:
The system waits for the user to press a key on the keypad.
3. Key ‘1’ Pressed:
Turns ON the buzzer (D10)
Lights the RED LED (RGB = Red:255, Green:0, Blue:0)
LCD shows: “ALARM ON”
4. Key ‘2’ Pressed:
Turns OFF the buzzer
Turns OFF RGB LED (All values = 0)
LCD shows: “ALARM OFF”
📟 User Interface:
Keypad:
Press 1 → Alarm ON
Press 2 → Alarm OFF
LCD Display:
Shows status clearly
Acts as visual feedback to the user
RGB LED:
Red when alarm is ON
OFF when alarm is OFF
Buzzer:
Active when alarm is ON
💡 Applications:
Basic security alarm systems
Educational demonstrations for embedded systems
Prototype for home automation alarm controls
Learning about keypad interfacing, display modules, and feedback devices
✅ Learning Outcomes:
By building this project, learners will understand:
How to interface a keypad with Arduino
How to operate a 16x2 LCD (non-I2C) in 4-bit mode
How to control RGB LED colors using PWM
How to use a buzzer for audible alerts
How to write and structure Arduino programs with conditional logic
Detail Step by Step explanation of code for the above program
Please download and upload the code to Arduino IDE
