Datasheet | Fc 51 Ir Sensor

The is a cheap, widely available active infrared proximity sensor used heavily in robotics and automation. It operates as a simple binary switch, outputting a LOW or HIGH digital signal depending on whether it detects reflected light from an object.

Photodiode that detects reflected infrared light.

Used in smart bins or automated faucets to detect hand proximity. Troubleshooting and Limitations

This comprehensive guide serves as an expanded technical datasheet, explaining how the FC-51 works, its electrical specifications, pinout, adjustment procedures, and integration steps. Technical Specifications Fc 51 Ir Sensor Datasheet

Digital (High/Low). It typically outputs Low (0V) when an object is detected and High (VCC) when the path is clear. Detection Angle: Approximately 35°. Physical Components (The "Pieces")

When an object enters the detection range, the light reflects back to the photodiode.

The datasheet for the FC-51 IR sensor provides the following key specifications: The is a cheap, widely available active infrared

The LM393 voltage comparator compares the voltage from the photodiode against a reference voltage set by the potentiometer.

If the reflected signal strength exceeds the threshold, the LM393 trips, turning on the onboard indicator LED and pulling the OUT pin LOW (0V) . When the path is clear, the OUT pin remains HIGH (VCC) via an internal pull-up resistor. Important Limitation: Surface Color Reflection

If your sensor is not behaving as expected, verify the following: Used in smart bins or automated faucets to

By understanding the pinout, electrical characteristics, and the crucial role of the LM393 comparator, you can integrate the FC-51 into your projects with confidence. Whether you are building a robot that navigates a maze or a simple hand sanitizer dispenser, the FC-51 offers a perfect balance of performance and simplicity.

The FC-51 module is designed for ease of integration with microcontrollers like Arduino, Raspberry Pi, and ESP8266. Specification 3.0V – 6.0V DC (Typical: 3.3V or 5V) Current Consumption ~23 mA at 3.3V; ~43 mA at 5.0V Detection Range 2 cm to 30 cm (Adjustable via potentiometer) Detection Angle Output Type Digital (HIGH/LOW logic) Active Output Level LOW when an obstacle is detected PCB Dimensions 3.1 cm (L) x 1.4 cm (W) Pinout Configuration