Overview
The IR Flame Sensor Module shown in the image is a high-sensitivity electronic detection board designed to detect fire sources or light sources with wavelengths ranging from 760 nm to 1100 nm. At its core, the sensor features an infrared photodiode (the black receiver bulb) paired with an LM393 high-precision voltage comparator IC.
The module provides both Analog (AO) and Digital (DO) output signals. The analog output gives a real-time signal strength reading proportional to the light/fire intensity, while the digital output produces a binary HIGH/LOW signal triggered when the detected radiation exceeds a adjustable threshold set via the onboard potentiometer. It also features dual LED indicators for Power status (PWR-LED) and Digital Output activity (DO-LED).












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