Flame Sensor Module 4-pin
The 4-Pin Flame Sensor Module is an infrared (IR) flame detection module designed to detect flames and fire sources by sensing infrared light in the 760–1100nm wavelength range. It features both analog (AO) and digital (DO) outputs, making it ideal for Arduino, ESP32, Raspberry Pi, robotics, and fire alarm projects. The onboard LM393 comparator and adjustable potentiometer allow easy sensitivity adjustment.
⚙️ Key Features
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Detects flames using infrared light
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Operating voltage: 3.3V – 5V DC
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Dual outputs: Analog (AO) and Digital (DO)
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Adjustable sensitivity via onboard potentiometer
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Built-in LM393 comparator
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Fast response time
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Power and detection status LEDs
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Easy interface with Arduino and other microcontrollers
📦 Technical Specifications
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| Operating Voltage | 3.3V – 5V DC |
| Operating Current | < 7mA |
| Detection Wavelength | 760 – 1100nm |
| Detection Distance | Up to 100 cm (depends on flame size) |
| Detection Angle | Approximately 60° |
| Output Type | Analog (AO) & Digital (DO) |
| Comparator | LM393 |
| Dimensions | Approx. 32 × 14 mm |
📌 Pin Configuration
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| VCC | 3.3V – 5V Power Supply |
| GND | Ground |
| DO | Digital Output |
| AO | Analog Output |
