Flame Sensor Module 3 pin
🔥 3-Pin Flame Sensor Module – Infrared Fire Detection (LM393 Based)
The 3-pin flame sensor module is a reliable, low-cost infrared sensor designed to detect the presence of a flame or light source within the 760nm–1100nm wavelength range. Commonly used in fire detection systems, robotics, and safety automation projects, this module can quickly detect infrared light emitted by fire and other heat sources.
It’s based on the LM393 comparator IC, which provides both analog and digital outputs, making it compatible with Arduino, Raspberry Pi, and other microcontrollers.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Operating Voltage | 3.3V – 5V DC |
| Detection Range | 0–80 cm (depending on flame size) |
| Wavelength Sensitivity | 760nm – 1100nm (Infrared) |
| Output Modes | Digital (D0), Analog (A0) |
| Interface | 3-pin: VCC, GND, D0 |
| Sensor Angle | 60° field of view |
| Comparator Chip | LM393 |
| Adjustable Sensitivity | Yes (via onboard potentiometer) |
🛠️ Applications
Fire Detection Systems: Used in homes, schools, factories, and robotics for early flame detection
Smart Safety Devices: Add flame-detection features to smart security or alarm systems
DIY Projects: Ideal for Arduino and STEM learning kits
Gas Leakage Fire Alert Systems: When combined with gas sensors like MQ-2 or MQ-135
🔌 Wiring Guide for Arduino
VCC → 5V (Arduino) GND → GND (Arduino) D0 → Digital Pin (e.g., D2) A0 → Analog Pin (e.g., A0) – optional if analog reading is needed
Note: Some flame sensor modules only expose D0 for digital output.
📺 YouTube Tutorial: