Fc 51 Ir Sensor Datasheet !exclusive! [ ORIGINAL · 2025 ]

It is common to see the FC-51 and TCRT5000 compared, as both are IR-based reflective sensors. However, they are designed for different purposes. Here is a quick comparison:

When an object comes in front of the sensor, the emitted IR light bounces off the object's surface.

If the sensor fails to detect close objects, turn the potentiometer clockwise to increase sensitivity. Verify that your power supply provides a steady 3.3V to 5V.

The compact PCB of the FC-51 is carefully populated to optimize signal integrity and ease of use: Fc 51 Ir Sensor Datasheet

Absorb IR light. A matte black object may need to be significantly closer to the sensor to trigger a detection, a characteristic often exploited in line-following robots. Arduino Interfacing Guide

The sensitivity is set too high, or the sensor is detecting its own reflection from ambient surfaces.

The changing voltage from the photodiode is sent to the LM393 voltage comparator IC. The LM393 compares this signal against a reference voltage set by the user via the onboard potentiometer. It is common to see the FC-51 and

The FC-51 IR sensor has the following features:

| Condition | Output Pin | Output LED | | :--- | :--- | :--- | | No object in front | HIGH (1) | OFF | | Object within set range | LOW (0) | ON |

2cm to 30cm (adjustable via onboard potentiometer). Detection Angle: ~35°. If the sensor fails to detect close objects,

Suitable for obstacle detection at low to medium speeds (e.g., small robots, conveyor belts).

The FC-51 is very straightforward to use with any Arduino board.