Flame Sensor Module – 4 Pin Output (Analog + Digital)

The Flame Sensor Module is an electronic sensor designed to detect flame and infrared light sources within the approximate wavelength range of 760 nm to 1100 nm. It is ideal for Arduino, ESP32, ESP8266, and other microcontroller-based electronics projects.

This module features an onboard LM393 comparator and an adjustable potentiometer to control digital output sensitivity. With both analog and digital outputs, it allows users to monitor sensor readings and configure flame detection thresholds for DIY fire detection experiments, robotics, and educational projects.

Key Features

• Flame Detection: Detects infrared light associated with flames within the approximate 760–1100 nm wavelength range.

• 4-Pin Interface: Provides power, ground, analog output, and digital output connections.

• Analog Output (AO): Provides a varying sensor signal based on the detected infrared light intensity.

• Digital Output (DO): Provides a HIGH or LOW signal when the sensor reading crosses the adjustable threshold.

• LM393 Comparator: Helps convert the sensor signal into a digital switching output.

• Adjustable Sensitivity: Onboard potentiometer allows adjustment of the digital detection threshold.

• Fast Response: Suitable for flame-sensing experiments and light detection projects.

• Wide Detection Angle: Approximately 60° under suitable conditions.

• Compact Design: Easy to integrate into electronic circuits and robotics projects.

• Indicator LEDs: Typically includes a power indicator and a digital output status indicator.

Technical Specifications

• Product Type: Flame Sensor Module

• Output Type: Analog + Digital

• Pin Configuration: 4-pin interface

• Comparator IC: LM393

• Detection Wavelength: Approximately 760–1100 nm

• Detection Distance: Up to approximately 100 cm, depending on flame size, lighting, and environmental conditions

• Detection Angle: Approximately 60°

• Operating Voltage: 3.3V–5V, as specified for this module

• Sensitivity Adjustment: Onboard potentiometer

• Applications: Flame detection experiments, robotics, and microcontroller projects

• Compatibility: Arduino, ESP32, ESP8266, and other compatible development boards

Pin Configuration

• VCC: Power supply (check the module's specified voltage)

• GND: Ground

• AO: Analog sensor output

• DO: Digital switching output

Applications

• Arduino flame detection projects

• DIY fire detection experiments

• Robotics and obstacle-response experiments involving flame sensing

• Automatic alarm prototypes

• Science fair and educational electronics projects

• Infrared light detection experiments

• Microcontroller-based sensor monitoring

• DIY automation and IoT prototypes

Important Notes

• This module is intended for hobby and educational projects. Do not rely on it as a certified fire alarm or as the sole fire safety device.

• Detection distance depends on flame size, ambient lighting, sensor orientation, and environmental conditions.

• The digital output threshold can be adjusted using the onboard potentiometer.

• Verify the module's pin labels and voltage requirements before connecting it to a microcontroller.

• Test only in a controlled and safe environment.

Package Includes

• 1 × Flame Sensor Module (4-Pin, Analog + Digital Output)

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