Fire / Flame Detection Alarm System
An early-warning fire detection system that senses flame presence and activates an alarm to alert users using an Arduino and flame sensor.
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₹4601.00
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Components
7 items
Difficulty
Intermediate
Build Time
2-3 hours
Project Details
How It Works
How It WorksThe system works by detecting infrared radiation emitted by flames. The flame sensor module contains a photodiode sensitive to wavelengths between 760-1100 nm. When flame is present, the photodiode generates a current that the module's comparator circuit converts to a digital signal (LOW when flame detected). The Arduino continuously monitors this digital input on pin D2. When a LOW signal is received (flame detected), the Arduino activates outputs: pin D8 drives the buzzer for audible alarm, and pin D9 lights the LED for visual indication. When no flame is detected (HIGH signal), both outputs are turned off.
Prerequisites
Basic understanding of Arduino programming and digital I/O operations. Familiarity with breadboard prototyping and simple circuit connections. Knowledge of how to install Arduino IDE and upload code to Arduino boards.
What You'll Learn
What You'll LearnUnderstanding how photodiodes detect flame emissions in the 760-1100 nm wavelength range
Learning to connect and read digital signals from flame sensor modules
Implementing conditional logic to trigger alarms based on sensor input
Understanding how sensor modules process analog signals into digital outputs
Building basic safety monitoring systems for fire detection applications
Key Features
Real-time detection of flame presence using infrared sensor technology
Dual alert system with buzzer sound and LED indicator for immediate notification
Ability to modify detection threshold through sensor positioning or code adjustments
Affordable implementation using readily available components
Foundation for adding wireless communication and remote monitoring capabilities
What's Included in the Kit
| Component | Qty | Price |
|---|---|---|
 | 1 | ₹767.00 |
 | 1 | ₹688.00 |
 | 1 | ₹13.00 |
 | 1 | ₹400.00 |
 | 1 | ₹3.00 |
 | 1 | ₹77.00 |
 | 10 | ₹1711.00₹171.00 × 10 |
Operating Instructions
Pin Connections
Pin Connections| MCU Pin | Connected To | Purpose | Notes |
|---|---|---|---|
| D2 | Flame Sensor Output | Digital input for flame detection signal | Sensor outputs LOW when flame is detected |
| D8 | Active Buzzer Positive | Digital output for audible alarm | Buzzer activates when flame is detected |
| D9 | LED Anode (via resistor) | Digital output for visual indicator | LED lights up when flame is detected |
| GND | Common Ground | Circuit ground reference | All components share common ground |
| 5V | Flame Sensor VCC | Power supply for sensor module | Provides 5V power to flame sensor |
Tools Required
Tools RequiredSafety Precautions
Electrical
- ⚠Ensure proper polarity when connecting components
- ⚠Avoid short circuits on breadboard
- ⚠Use current limiting resistor for LED
Handling
- ⚠Handle flame sensor with care to avoid damaging the photodiode
- ⚠Keep components away from excessive heat
Operating
- ⚠Use controlled flame for testing only
- ⚠Test in well-ventilated area
- ⚠Never leave unattended during testing
Frequently Asked Questions
Frequently Asked QuestionsQ:What is the detection range of the flame sensor?
Q:Can this system detect smoldering fires?
Q:How can I increase the sensitivity?
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