How to Make Security Alarm System with Arduino Nano and Ultrasonic sensor | Science Project |

🔔 Arduino-Based Security Alarm System | Ultrasonic Sensor Project 🔔 In this video, I have built a Security Alarm System using Arduino Nano. This project uses an ultrasonic sensor to detect motion or intrusion, and when an object comes within a set distance, a buzzer is activated as an alarm. This is a simple yet effective Arduino beginner-to-intermediate level project, ideal for: Diploma & engineering students School science projects Arduino & electronics beginners 🧰 Components Used: Arduino Nano Ultrasonic Sensor (HC-SR04) Buzzer Breadboard Jumper Wires ⚙️ Working Principle: The ultrasonic sensor continuously measures distance using ultrasonic waves. When any object comes closer than the predefined distance, the Arduino processes the signal and triggers the buzzer, alerting about a possible intrusion. 📌 Applications: Home security system Door intrusion alarm Motion detection system Smart electronics projects If you like this project, don’t forget to Like 👍, Share 📤, and Subscribe 🔔 for more Arduino and electronics projects. #Arduino #SecurityAlarm #UltrasonicSensor #ArduinoNano #ElectronicsProject #DIYArduino