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Arduino Based Gas Leakage Detector Project
ARDUINO-BASED GAS LEAKAGE D
ETECTOR
• Gas leaks can pose serious dangers in homes and small
setups.
• This project uses an MQ-5 gas sensor with Arduino Uno to
detect leaks.
• It triggers a buzzer and an LED as alerts when gas is
present.
• A beginner-friendly, low-cost safety solution.
WHATYOU NEED &
HOW IT IS CONNECTED
Components:
• Arduino Uno
• MQ-5 Gas Sensor
• Buzzer, LED, 220 Resistor
Ω
• Breadboard, Jumper Wires, Power Source
Circuit Connections:
• MQ-5 A2 (Gas Input)
→
• LED A1 (Visual Alert)
→
• Buzzer A0 (Sound Alert)
→
• Power: 7.2V Battery ArduinoVin
→
HOW THE CODE WORKS
Pin Configuration:
• A2 MQ-5 Sensor
→
• A1 LED
→
• A0 Buzzer
→
Code Flow:
• Read analog value from MQ-5
• If gas detected (LOW): LED & Buzzer ON,
print alert
• Else: LED & Buzzer OFF, print normal
• Add delay to avoid false triggering
HOW ITWORKS IN REAL LIFE
Demo Steps:
• Upload code to Arduino
• Tune sensor using potentiometer
• Simulate gas using a lighter (unlit)
• Buzzer & LED activate when gas is
detected
• Alerts stop once gas clears
Tuning Tip:Adjust potentiometer until
onboard LED responds correctly.
WHERE CANYOU USE THIS
PROJECT?
• Home Kitchens – Detect LPG leaks
• Restaurants & FoodTrucks – Compact safety monitor
• Warehouses – Basic leak detection
• STEM Projects – Perfect for electronics learners
• RVs & Camping – Portable gas detection
• Labs &Workshops – Backup gas safety tool
COMMON QUESTIONS
ANSWERED
❓ Can I use other gas sensors? Yes – MQ-2, MQ-6, etc.
❓ Is it accurate? Good for general use, not industrial.
❓ Sensor lifespan? 2–5 years with proper handling.
🔧 Tip:Warm up the MQ-5 for ~24 hrs for stable readings.
WRAP-UP &
FUTURE IDEAS
✅ Learn sensor basics + Arduino control
✅ Real-time alerts improve safety
✅ Easy to replicate or expand
🚀 Next Steps:
• Add SMS alerts (GSM module)
• IoT support with ESP8266
• Display gas levels on LCD/OLED
• Build a full smart safety system
For a more in-depth tutorial, check
out this article:
https://circuitdigest.com/microcontroller-pr
ojects/gas-leakage-detector-using-arduino-c
omplete-diy-guide
www.circuitdigest.com
Arduino Projects|Raspberry Pi Projects|
ESP32 Projects | AI Projects | IoT Projects

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Arduino Based Gas Leakage Detector Project

  • 2. ARDUINO-BASED GAS LEAKAGE D ETECTOR • Gas leaks can pose serious dangers in homes and small setups. • This project uses an MQ-5 gas sensor with Arduino Uno to detect leaks. • It triggers a buzzer and an LED as alerts when gas is present. • A beginner-friendly, low-cost safety solution.
  • 3. WHATYOU NEED & HOW IT IS CONNECTED Components: • Arduino Uno • MQ-5 Gas Sensor • Buzzer, LED, 220 Resistor Ω • Breadboard, Jumper Wires, Power Source Circuit Connections: • MQ-5 A2 (Gas Input) → • LED A1 (Visual Alert) → • Buzzer A0 (Sound Alert) → • Power: 7.2V Battery ArduinoVin →
  • 4. HOW THE CODE WORKS Pin Configuration: • A2 MQ-5 Sensor → • A1 LED → • A0 Buzzer → Code Flow: • Read analog value from MQ-5 • If gas detected (LOW): LED & Buzzer ON, print alert • Else: LED & Buzzer OFF, print normal • Add delay to avoid false triggering
  • 5. HOW ITWORKS IN REAL LIFE Demo Steps: • Upload code to Arduino • Tune sensor using potentiometer • Simulate gas using a lighter (unlit) • Buzzer & LED activate when gas is detected • Alerts stop once gas clears Tuning Tip:Adjust potentiometer until onboard LED responds correctly.
  • 6. WHERE CANYOU USE THIS PROJECT? • Home Kitchens – Detect LPG leaks • Restaurants & FoodTrucks – Compact safety monitor • Warehouses – Basic leak detection • STEM Projects – Perfect for electronics learners • RVs & Camping – Portable gas detection • Labs &Workshops – Backup gas safety tool
  • 7. COMMON QUESTIONS ANSWERED ❓ Can I use other gas sensors? Yes – MQ-2, MQ-6, etc. ❓ Is it accurate? Good for general use, not industrial. ❓ Sensor lifespan? 2–5 years with proper handling. 🔧 Tip:Warm up the MQ-5 for ~24 hrs for stable readings.
  • 8. WRAP-UP & FUTURE IDEAS ✅ Learn sensor basics + Arduino control ✅ Real-time alerts improve safety ✅ Easy to replicate or expand 🚀 Next Steps: • Add SMS alerts (GSM module) • IoT support with ESP8266 • Display gas levels on LCD/OLED • Build a full smart safety system
  • 9. For a more in-depth tutorial, check out this article: https://circuitdigest.com/microcontroller-pr ojects/gas-leakage-detector-using-arduino-c omplete-diy-guide www.circuitdigest.com Arduino Projects|Raspberry Pi Projects| ESP32 Projects | AI Projects | IoT Projects