Fc 51 Ir Sensor Datasheet !!top!! Online

There is a common confusion: the FC-51 can either be or Active HIGH depending on the manufacturer. The original design often outputs LOW when an object is detected and HIGH when no object is present . However, many clones invert this. Always test your module first.

Used to adjust the detection range sensitivity. Turning it clockwise increases the detection distance. Fc 51 Ir Sensor Datasheet

This code prints "OBSTACLE!!" to the serial monitor when an object is detected. There is a common confusion: the FC-51 can

| Symbol | Parameter | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | VCC | Supply Voltage | 3.0 | 5.0 | 5.5 | V | | ICC | Supply Current | 5 | 15 | 25 | mA | | VOL | Output Low Voltage (sink) | 0 | 0.2 | 0.4 | V | | VOH | Output High Voltage (source) | 4.5 | 4.8 | 5.0 | V | | IOL | Output Low Current (max sink) | - | 10 | 15 | mA | | IOH | Output High Current (max source) | - | 5 | 10 | mA | | Tdet | Detection response time | - | 1.5 | 2.0 | ms | Always test your module first

Because the FC-51 outputs a simple digital high/low signal, it connects easily to any GPIO pin on an Arduino, ESP32, or Raspberry Pi. Wiring Diagram →right arrow Arduino 5V FC-51 GND →right arrow Arduino GND FC-51 OUT →right arrow Arduino Digital Pin 2 Sample Arduino Code

The FC-51 relies on basic optical reflection principles. The transparent IR LED constantly emits infrared light at a specific wavelength (typically around 950nm), which is invisible to the human eye. IR light propagates forward in a 35-degree cone.