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

When you hear "FC-51 Infrared Sensor," you likely think of a line-following robot or an Arduino tutorial. However, this tiny, affordable component ($2–$5) is the unsung hero of many modern lifestyle conveniences and interactive entertainment projects. By detecting objects and movement without physical contact, the FC-51 bridges the gap between the digital and physical worlds.

Best for sharing the datasheet link quickly with relevant hashtags.

Lights up when an object is within the set detection range.

Connect four FC-51 sensors in an arc. Wave left → previous track. Wave right → next track. Wave up → volume up. Wave down → pause. It’s a magical way to control a party playlist without touching a screen.

The is a compact, active infrared module designed for obstacle avoidance and proximity detection. It operates by emitting a beam of infrared light; if an object is within its path, the light reflects back to a photodiode receiver, triggering a digital output. Core Technical Specifications