Integrating the FC-51 with an Arduino UNO is straightforward due to its digital interface. Wiring Diagram →right arrow Arduino 5V FC-51 GND →right arrow Arduino GND FC-51 OUT →right arrow Arduino Digital Pin 2 Sample Arduino Sketch
One power LED (always on) and one signal LED (lights up when an object is detected). Pin Configuration Fc 51 Ir Sensor Datasheet
The FC-51 typically features a 3-pin interface for easy connectivity with microcontrollers like Arduino or Raspberry Pi: Connects to the positive power supply (3.3V–5V). Connects to the ground/negative power supply. The digital output pin. It outputs a signal when an object is detected and a signal when the path is clear. Working Principle The IR LED continuously emits infrared light. Integrating the FC-51 with an Arduino UNO is
The FC-51 is an ideal component for applications that require basic, close-range detection. While it is not the right tool for precise distance measurement, it provides a simple and proven method for detecting the presence or absence of an object. Connects to the ground/negative power supply
The module features an onboard IR transmitter (a clear IR LED) that continuously emits a beam of infrared light.
The is an affordable, highly efficient electronic module widely used in robotics, automation, and smart home projects. Utilizing infrared (IR) light, this active sensor detects objects within its line of sight, making it a staple for autonomous navigation and proximity sensing.
| Pin Name | Description | |----------|-------------| | | Power supply (3.3–5V) | | GND | Ground | | OUT | Digital output (0V when obstacle present, Vcc when no obstacle) | | EN | Enable pin (leave floating or pull HIGH to enable; LOW may disable) – not always present on all clones |