Fc 51 Ir Sensor Datasheet Jun 2026

Illuminates only when an object reflects enough IR light to trigger the output threshold. If this LED is on, the OUT pin is driving a LOW signal. Working Principle and Physics

The FC-51 is designed to interface directly with common microcontrollers. Below are practical code examples for both Arduino and Raspberry Pi Pico.

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 Fc 51 Ir Sensor Datasheet

The effective detection range of the FC-51 depends on the reflectivity and color of the target object. Black objects absorb IR light (reducing range), while white objects reflect it efficiently (increasing range). Step-by-Step Tuning Power up the module with a 5V source.

Lights up immediately when the module receives stable VCC and GND. Illuminates only when an object reflects enough IR

If no obstacle is present, the light radiates outward and dissipates. When an object passes in front of the sensor, the IR light bounces off the object's surface.

Add a decoupling capacitor (e.g., 0.1µF) across VCC and GND close to the sensor. Below are practical code examples for both Arduino

2cm to 30cm (adjustable via onboard potentiometer). Detection Angle: ~35°.

Detection range is highly dependent on the object's reflectivity. It excels with white or light-colored surfaces but may fail to detect black or IR-absorbent materials.