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Flame Sensor Module (4-Pin)

The Flame Sensor Module is a high-sensitivity infrared (IR) detector designed to identify open flames or light sources within the 700nm to 1100nm wavelength range. It is most sensitive to the specific IR spectrum produced by fire, making it a critical component for fire alarms, safety systems, and flame-fighting robots. The module features a dual-output design—providing both a digital signal for immediate alerts and an analog signal for precise distance or intensity measurements.

Key Features

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  Dual Output Support: Equipped with both Digital (DO) and Analog (AO) pins for flexible system integration.

  
  


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  Adjustable Sensitivity: Includes an onboard potentiometer to fine-tune the detection range up to 100 cm.

  
  


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  Wide Detection Angle: Offers a sensitivity angle of approximately 60 degrees

  
  


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  Visual Feedback: Features dedicated LEDs for power status and signal detection

  
  


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  Stable Processing: Uses the LM393 comparator chip to ensure clean, reliable digital readings.

  
  

Technical Specifications

Pin Configuration

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  VCC (+): Power supply (3.3V – 5V).

  
  


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  GND (G): Ground connection.

  
  


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  DO: Digital Output—connects to a microcontroller digital input; triggers HIGH when flame is detected.

  
  


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  AO: Analog Output—provides a real-time voltage signal for measuring flame proximity.

  
  

Applications

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  Fire Safety: Early warning systems for homes, warehouses, and industrial environments.

  
  


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  Robotics: Essential for fire-fighting robots to locate and navigate toward a heat source.

  
  


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  Industrial Monitoring: Detecting ignition in gas-based systems and automatic power cut-off safety switches.

  
  


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  Education: Prototyping IR-based detection and sensor integration for engineering students.