4 pin flame sensor module

The 4‑pin flame sensor module is an infrared (IR) based sensor designed to detect fire or flame sources. It is commonly used in fire alarm systems, safety devices, and robotics. The sensor responds to the infrared light emitted by flames and provides both analog and digital outputs for flexible interfacing with microcontrollers like Arduino, ESP8266, ESP32, and Raspberry Pi.

🔹 Key Specifications

• Pins:
  • VCC → Power supply (3.3V–5V DC)
  • GND → Ground
  • DO → Digital output (HIGH/LOW signal when flame detected)
  • AO → Analog output (proportional to flame intensity)
• Detection Range: Typically up to 80–100 cm (depends on flame size and module quality)
• Detection Angle: ~60° cone angle
• Wavelength Sensitivity: 760 nm – 1100 nm (infrared light from flames)
• Indicator LEDs: Power LED and output status LED
• Adjustable Sensitivity: Onboard potentiometer to set detection threshold

🔹 Features

• Dual Output: Provides both analog and digital signals.
• High Sensitivity: Detects small flame sources within range.
• Easy Integration: Compatible with 3.3V and 5V logic systems.
• Compact Design: Small PCB size for embedded projects.
• Visual Indicators: LEDs show power and detection status.

🔹 Applications

• Fire alarm and safety systems
• Flame‑detecting robots (fire‑fighting robots)
• Industrial safety monitoring
• Gas leak detection systems (combined with other sensors)
• Educational electronics projects

✅ In summary: The 4‑pin flame sensor module is a versatile, low‑cost sensor that detects infrared light from flames, offering both analog and digital outputs for easy integration into safety, robotics, and automation projects.