how to make simple laser security alarm | thief detection alarm | Laser security alarm using ESP8266

Описание: 🔰 Introduction

In this video, I have designed and implemented an advanced laser-based security system using NodeMCU (ESP8266), LDR sensor, laser module, and mirrors.
The laser beam is reflected using three mirrors to form a square protective field around a valuable object.
If anyone tries to touch or cross this laser-protected area, the system instantly detects the intrusion and sends a real-time mobile alert using Blynk IoT.

This project demonstrates how IoT + optics + sensors can be combined to build a smart and reliable security solution.

🔍 Project Explanation

A laser module continuously emits a beam.
Using two mirrors, the laser is reflected to travel in a Triangle path.
The laser finally hits an LDR sensor, completing the laser loop.
A valuable object is placed at the center of the laser triangle.
When the laser path is interrupted:
LDR value changes
NodeMCU detects the intrusion
Red LED turns ON
Mobile notification is sent via Blynk
When the laser path is uninterrupted:
System remains in SAFE mode
Blue LED stays ON
This creates a 360-degree invisible laser fence around the object.

🔧 Components List

NodeMCU ESP8266
LDR Sensor Module
Laser Light Module
2 Mirrors
Red LED
Blue LED
220Ω Resistors
Breadboard
Jumper Wires
Power Supply / USB Cable

💻 Source Code

📌 GitHub Repository:
👉https://github.com/iothubtelugu/IOT-H...

(Replace this link with your actual GitHub repo link)

🎓 What Will You Learn in This Video?

How to use NodeMCU ESP8266 for IoT projects

Working of LDR sensors (analog output)

Creating a laser security system using mirrors

Reading analog sensor values using analogRead()

Setting thresholds for intrusion detection

Sending real-time mobile alerts using Blynk IoT

Designing a smart object protection system

🚀 Applications

Home security systems

Jewellery and locker protection

Museum artifact security

Smart home automation

IoT-based intrusion detection

🙌 Support

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