IntelliVent

Smart CO Detection and Ventilation System

IntelliVent is a smart and affordable carbon monoxide (CO) detection and ventilation
system designed to prevent CO poisoning in enclosed spaces such as bathrooms,
kitchens, garages, or small rooms. It continuously monitors CO concentration in the air
and automatically activates ventilation when harmful levels are detected.

🔑 Key Features

• Real-time CO Monitoring: Uses the MQ-9 gas sensor to detect CO concentration levels.
• Smart Processing: Arduino UNO R3 acts as the central controller, converting sensor data into ppm values.
• Dynamic Alerts:
  • 🟢 Green — Safe
  • 🟡 Yellow — Caution
  • 🔴 Red + Buzzer — Danger
• Automatic Ventilation: Controls an exhaust fan via an L298N motor driver, adjusting speed based on CO concentration.
• Visual Display: GME12864 OLED shows live CO readings and air quality status.

⚙️ Working Principle

The MQ-9 gas sensor’s resistance (Rs) changes with varying CO concentration.
The Arduino reads this analog variation, calculates CO levels in ppm using a calibration formula, and triggers suitable actions such as:

• Displaying air quality on OLED display
• Activating/cycling exhaust fan
• Alerting users with LEDs and buzzer

🧩 Components Used

Component	Purpose
Arduino UNO R3	Central Controller
MQ-9 Sensor	CO Detection
L298N Motor Driver	Fan Speed Control
12V Fan	Ventilation
OLED Display	CO Display
LEDs	Status Indication
Buzzer	Danger Alert
Power Supply	System Power

📌 Applications

• Home Safety: Detects CO and LPG leaks in kitchens and bathrooms
• Industrial Areas: Monitors CO near generators or combustion sources
• General Ventilation: Improves airflow in enclosed rooms

By

Rishti R Kulkarni, Priyamvada K C, Hrushikesh R