Fc 51 Ir Sensor Datasheet May 2026

Quick guide: FC-51 IR Sensor (datasheet overview + usage)

What the FC-51 is

• Type: IR obstacle/reflection sensor module (active infrared).
• Main components: IR LED (IR emitter), photodiode/phototransistor (IR receiver), potentiometer (sensitivity), comparator/OpAmp (on-module), indicator LED, output pin(s).
• Typical use: Detect nearby objects or line/edge sensing, simple proximity/obstacle detection for microcontroller projects.

The operational limits of the module heavily dictate its deployment in embedded systems:  Operating Voltage: 3.0V to 6.0V DC (Standard TTL levels) Current Consumption: ~23 mA at 3.3V | ~43 mA at 5.0V

The module consists of several key parts that handle signal transmission and processing: IR Emitter: Sends out a continuous infrared signal. IR Receiver (Photodiode): Detects the IR light reflected back from obstacles. LM393 Comparator: Fc 51 Ir Sensor Datasheet

OUT: Digital output pin that provides a signal based on detection status. Working Principle Quick guide: FC-51 IR Sensor (datasheet overview +

Conclusion