Fc 51 Ir Sensor Datasheet Access

*Note: The EN (Enable) pin is rarely populated on standard breakout boards; usually, the sensor is always enabled.

There is a common confusion: the FC-51 can either be or Active HIGH depending on the manufacturer. The original design often outputs LOW when an object is detected and HIGH when no object is present . However, many clones invert this. Always test your module first. Fc 51 Ir Sensor Datasheet

The module typically features a 3-pin male header for easy connection to microcontrollers like Arduino or Raspberry Pi: Description Power Supply 3.3V - 5V DC input. GND Common ground connection. OUT Digital Output Goes LOW when an object reflects IR light. Working Principle *Note: The EN (Enable) pin is rarely populated