Fc 51 Ir Sensor Datasheet Hot May 2026

The blue trimmer pot is carbon-track, which changes resistance with temperature. A 10°C rise can shift the threshold by 5–10%, altering the detection range. This is why your robot might detect at 15cm when cold, but only 8cm when hot.

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. fc 51 ir sensor datasheet 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. The blue trimmer pot is carbon-track, which changes

Most sellers provide a minimal datasheet. For engineering use, you need to supplement it with: Pro tip: Download the generic “FC-51 Infrared Obstacle

Pro tip: Download the generic “FC-51 Infrared Obstacle Avoidance Sensor User Manual” from LCSC or Mouser. Then print this article and attach it as a thermal performance addendum to your lab notebook.

The FC-51 is built around the LM393 voltage comparator and an active infrared sensor pair. Below are the critical technical parameters:

Pin Configuration: