Smooth, glossy surfaces offer specular reflection, producing consistent detection. Rough, matte, or transparent objects scatter or pass light through, drastically hurting accuracy.
Interfacing the FC-51 with an Arduino UNO is incredibly straightforward because it outputs a simple digital high/low signal, removing the need for analog-to-digital conversion formulas. Wiring Diagram Arduino UNO Pin Digital Pin 2 Arduino Example Code
A small blue multi-turn potentiometer resides on the board. Turning it clockwise increases the detection range; turning it counterclockwise decreases the range. Fc 51 Ir Sensor Datasheet
If the light hits a light-colored or reflective object, a significant portion reflects backward. If it hits a matte black or dark object, the material absorbs the IR light, drastically reducing the effective detection range.
The FC-51 has a simple 3-pin interface, making it easy to connect to almost any microcontroller (MCU). Wiring Diagram Arduino UNO Pin Digital Pin 2
Performance can be inconsistent under strong ambient light or sunlight, which may require shielding or recalibration of the sensitivity potentiometer.
You can find the FC-51 IR Sensor at retailers like Art of Circuits or DIY Electronics . Detecting obstacle with IR Sensor and Arduino If it hits a matte black or dark
The is a versatile and low-cost infrared obstacle avoidance module widely used in robotics, security systems, and DIY electronics . This module, often referred to as the "Flying Fish" sensor, uses a pair of infrared emitting and receiving tubes to detect obstacles within a range of approximately 2 cm to 30 cm . FC-51 Technical Specifications
is a popular infrared (IR) obstacle avoidance sensor module commonly used in robotics for object detection and line tracking Inforbatista