FC-51 IR Obstacle Avoidance Sensor is a cost-effective, versatile module designed for proximity detection in electronics projects. Whether you are building an autonomous robot or a touchless alarm system, understanding this module's technical specifications and calibration is key to successful integration. FC-51 Core Technical Specifications
The FC-51 operates on a simple principle: it emits infrared light and detects the reflection off nearby objects.
The FC-51 IR sensor, often called the "Flying Fish," is a popular digital proximity module used in robotics to detect obstacles. It works by emitting an infrared signal; if an object reflects that light back, the sensor triggers a "Low" logic output. The Technical Specs
Operating Voltage: 3.0V to 6.0V (Standard use is typically 3.3V or 5V). fc 51 ir sensor datasheet hot
Current Consumption: Approximately 23 mA at 3.3V and 43 mA at 5.0V.
Detection Range: Adjustable between 2cm and 30cm using the onboard potentiometer. Detection Angle: Approximately 35°.
Core Component: Uses an LM393 comparator for stable and accurate digital switching. Key Features for Makers FC-51 IR Obstacle Avoidance Sensor is a cost-effective,
Dual LED Indicators: One LED shows power status, while the second (usually green) lights up only when an obstacle is detected.
Adjustable Sensitivity: A small screw on the potentiometer allows you to fine-tune the range.
Plug-and-Play: Featuring a 3-pin header (VCC, GND, OUT), it easily connects to controllers like an Arduino. A Story of Utility VCC — +3
Arrange several FC-51 sensors across a hallway. When a player breaks an IR beam (by walking through), a buzzer sounds or a counter increments. It’s a family-friendly alternative to laser tag for birthday parties.
The FC-51’s simplicity makes it ideal for non-technical upgrades to your living space.