👉 Don’t Touch This… It Triggers an Alarm 😳 | DIY Security System

In movies, you always see security systems protecting important things… 😳
So I decided to build a simple DIY version to protect my own stuff!

In this project, I made a smart security system using Arduino.
When an object is placed, nothing happens…
But the moment someone tries to take it — 🚨 alarm triggers instantly!

This is a simple and useful project for beginners and electronics lovers.

🔧 Components Used:
Arduino Uno
Ultrasonic Sensor (HC-SR04)
Buzzer
Red LED
Breadboard
Jumper Wires

🔌 Connection Diagram:
Ultrasonic VCC → 5V
Ultrasonic GND → GND
Ultrasonic TRIG → Pin 9
Ultrasonic ECHO → Pin 10
Buzzer (+) → Pin 8
Buzzer (–) → GND
LED (+) → Pin 13 (with resistor)
LED (–) → GND

💻 How It Works:

The ultrasonic sensor continuously measures distance.
When the object is removed, the distance changes —
and the system triggers a buzzer and LED alarm.

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Видео 👉 Don’t Touch This… It Triggers an Alarm 😳 | DIY Security System канала Proto Vision