IR Infrared Flame Sensor Module

Fire emits infrared light in a specific range most other light sources do not, and this sensor's photodiode is tuned to pick that signature out from normal ambient IR noise - the entire reason it can distinguish an actual flame from a bright light or sunlight reflection rather than triggering on every light source in a room. A 60 degree detection cone gives reasonable room coverage from one sensor without needing multiple units pointed in different directions.

Output is a simple digital signal, so integration is a matter of reading one pin and reacting to a state change - the sensor itself decides whether infrared in the flame-characteristic range is present, rather than the microcontroller doing raw signal analysis. Running on 3.3V to 5V means it drops onto both 3.3V and 5V boards without a level shifter.

Common uses are basic fire alarm projects, flame-triggered safety shutoffs for electronics or motors, and educational builds demonstrating simple environmental hazard detection.