Fc 51 — Ir Sensor Datasheet Hot Verified

The FC-51 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 

I noticed a lot of people searching for the FC-51 IR sensor datasheet recently (it seems to be a "hot" topic right now!). I know these generic sensors often come without documentation, so I wanted to share a reliable resource for anyone trying to wire one up. fc 51 ir sensor datasheet hot

if(obstacle) // Trigger action

• Low cost, easy to interface with microcontrollers (Arduino, ESP, Raspberry Pi).
• Adjustable sensitivity.
• Small and simple to mount.

#define SENSOR_POWER 7
#define SENSOR_OUT 2
3. Smart Drawer or Closet Lighting
Place the FC-51 inside a dark drawer or wardrobe. The moment you open it, the sensor detects the change in reflection (or your hand reaching in) and turns on an LED strip. No more fumbling for clothes in the dark. The FC-51 is a common infrared (IR) obstacle
The Mysterious Case of the Overheated IR Sensor Low cost, easy to interface with microcontrollers (Arduino,
The FC-51 IR sensor datasheet had provided him with the necessary information to get started. He noted that the sensor operated at a voltage of 3.3V to 5V, with a maximum current consumption of 20mA. The datasheet also mentioned that the sensor's infrared LED emitted light at a wavelength of 950nm, which was perfect for detecting obstacles.
4.4. Recalibrate When Hot
Do not calibrate the potentiometer at power-up. Let the sensor run idle (with IR LED active) for 15 minutes, then adjust the blue trimmer for the desired range. This “hot calibration” ensures thermal equilibrium.