SmokeWatch - Arduino MQ-2 Smoke Detection & Alarm System

About this project

Build standalone smoke and flammable gas detection system using Arduino Uno with MQ-2 sensor for fire safety monitoring. Detect smoke, LPG, methane, and combustible gases with adjustable sensitivity threshold, trigger alarm buzzer and LED indicators, display gas concentration on LCD, implement automatic ventilation control via relay. Perfect for home fire safety, kitchen gas leak detection, garage safety monitoring, and industrial fire prevention systems. Achieves 300-10000 ppm detection range with audible and visual alarms.

What you get

• Complete, commented source code
• Full components list with quantities
• Pin-by-pin wiring guide and connection table
• Step-by-step upload and testing guide
• Project report (.docx, IEEE style)
• Presentation slides (.pptx)