FC-51
The is a common infrared (IR) obstacle avoidance module typically used for basic proximity detection. Because it is a "hobbyist-grade" component, a single formal scholarly paper focused solely on its datasheet is rare. However, the most relevant academic research for this specific module is a very recent paper (December 2024) that analyzes its performance limitations. Featured Academic Paper
Thermal Sensitivity
: The FC-51 is an active IR sensor (it sends its own light); it does not detect heat signatures like a "hot" person or object. For heat detection, you would need a Passive Infrared (PIR) sensor or a Thermal Imager .
Concerned about the overheating issue, John consulted the datasheet again. He discovered that the FC-51 IR sensor had a maximum power dissipation rating of 100mW. He suspected that the high ambient temperature and the sensor's internal heating might be causing the excessive heat.
- VCC – 3.3V to 5V power input.
- GND – Common ground.
- OUT – Digital output (0V when obstacle is close, 5V when no obstacle).
The FC-51 IR sensor datasheet provides the following key specifications:
