Detect fire and light sources with precision using this LM393 4-Pin IR Flame Sensor Module. Designed specifically for Arduino and microcontroller projects, this module is sensitive to flame wavelengths between 760nm and 1100nm. Whether you are building a fire alarm system, a firefighting robot, or a safety monitoring device, this sensor provides reliable detection with both digital and analog outputs.

Key Features:

• High Sensitivity: Detects flames or light sources in the 760nm–1100nm range.
• Wide Detection Angle: approximately 60 degrees, specifically tuned for flame spectra.
• Dual Output Modes:
  • DO (Digital Output): Switch signal (0 and 1) for easy logic integration.
  • AO (Analog Output): Provides real-time voltage values for higher accuracy measurement.
• Adjustable Sensitivity: On-board blue potentiometer allows you to fine-tune the detection threshold.
• Clean Signal: Uses the LM393 comparator for a stable waveform and strong driving ability (>15mA).

Technical Specifications:

• Controller: LM393 Comparator (Wide voltage)
• Working Voltage: 3.3V – 5V DC
• Detection Range: Up to 80cm (Greater distance for larger flames)
• Indicators: Power LED and Digital Output LED
• PCB Size: 3.2cm x 1.4cm
• Mounting: Fixed bolt hole for easy installation

Pinout:

1. VCC: 3.3V-5V Voltage
2. GND: Ground
3. DO: Digital Output Interface (0 and 1)
4. AO: Analog Output Interface

Note: The sensor should be kept at a safe distance from the actual flame to avoid heat damage.