Скачать или смотреть How to Make a Laser Security Alarm System at Home Using BC547 & LDR

In this video, learn how to make a Laser Security Alarm System at Home using simple components like BC547 transistor, LDR, Laser Module, Resistors, Buzzer, and a 9V Battery. This DIY laser tripwire project is perfect for home safety, science exhibitions, and fun electronics experiments.

🔧 What You'll Learn:

How a laser and LDR can detect motion or intrusion

Role of BC547 transistor in triggering the buzzer

Complete circuit explanation and live working demo

How to connect and test the circuit step by step


🎯 Components Required:

BC547 NPN Transistor

12V Buzzer

LDR (Light Dependent Resistor)

Laser Module (Red Laser Pointer)

1kΩ and 10kΩ Resistors

9V Battery and Clip

Breadboard or PCB

Wires


💡 Why You Should Try This:

Great for science fair or school projects

Simple home security system with low cost

Fun learning for beginners and hobbyists


📌 Watch the full video for detailed explanation and real testing!
👍 Like the video | 🔔 Subscribe to the channel | 💬 Comment for doubts or suggestions

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