Fc 51 Ir Sensor Datasheet -

The FC-51 is a highly popular, low-cost infrared (IR) obstacle avoidance sensor widely used in robotics, automation, and Arduino projects. It provides a simple digital output whenever an object enters its detection range.

The onboard potentiometer enables users to set the sensitivity or the distance at which an object is detected (2cm to 30cm).

Based on the FC-51 IR Sensor Overview , the core technical data is as follows: 3.3V to 5V DC. Fc 51 Ir Sensor Datasheet

Direct sunlight or heavy incandescent lighting contains massive amounts of natural IR radiation. This can flood the photodiode, causing false positives or forcing the output to stay permanently LOW. Use physical shrouds or blinders around the sensor in bright rooms.

The IR receiver (black photodiode) captures the reflected light and converts it into an electrical signal. The FC-51 is a highly popular, low-cost infrared

Here are the standard ways to wire it to popular development boards:

Connecting the FC-51 to an Arduino requires only three jumper wires. Because the module outputs a simple digital high/low signal, it can be read using any standard digital input pin. Wiring Diagram Arduino Uno Pin Digital Pin 2 Arduino Source Code Based on the FC-51 IR Sensor Overview ,

The following sketch reads the digital state of the FC-51 sensor and prints the status to the Serial Monitor. It also illuminates the built-in Arduino LED (Pin 13) when an obstacle is detected.

Integrating the FC-51 with an Arduino UNO is straightforward due to its digital interface. Wiring Diagram →right arrow Arduino 5V FC-51 GND →right arrow Arduino GND FC-51 OUT →right arrow Arduino Digital Pin 2 Sample Arduino Sketch

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void loop() int irSensorValue = digitalRead(irSensorPin); if (irSensorValue == HIGH) Serial.println("Obstacle detected!"); else Serial.println("No obstacle detected.");