Smoke Detector using MQ2

I designed and implemented a Smart Smoke Detection and Fire Safety System using an Arduino, MQ2 gas sensor, LCD display, and a servo motor to enhance safety in indoor environments.

The system continuously monitors air quality for smoke and flammable gases. When a dangerous level is detected, the Arduino processes the sensor data and automatically activates a servo motor to open a door or ventilation outlet, helping release smoke and reduce the spread of fire. Real-time system status is displayed on an LCD screen.

? What I Built

✔ Smart smoke and gas detection system

✔ Automatic door/vent control using servo motor

✔ Real-time data display on LCD

✔ Early fire hazard warning solution

✔ Embedded safety automation system

? System Overview

The MQ2 sensor detects smoke and flammable gases (LPG, propane, methane, etc.)

The Arduino reads and analyzes sensor values continuously

When smoke exceeds a predefined threshold:

The servo motor is triggered using PWM signals

The door or ventilation mechanism opens automatically

The LCD displays system status and alerts

The system resets once safe conditions are restored

? Key Features

? Early smoke and fire detection

? Automatic door/vent opening using servo motor

? Real-time LCD status display

⚙️ Precise servo control via PWM

? Reliable Arduino-based control logic

? Ideal for homes, offices, and industrial safety systems

? Use Cases

? Smart Homes

Early smoke and gas detection for residential safety

Automatic ventilation or door opening during smoke detection

Real-time visual alerts via LCD for occupants

Integration-ready for smart home automation systems

? Fire Safety Systems

Early fire and smoke hazard detection

Automatic response to reduce smoke accumulation

Enhanced evacuation safety through automatic door control

Suitable for fire prevention demonstrations and training systems

? Industrial Automation

Smoke and gas monitoring in factories and warehouses

Detection of flammable gases in industrial environments

Automatic safety actions to reduce fire risks

Can be expanded to trigger alarms, ventilation systems, or shutdown procedures