Fc 51 Ir Sensor Datasheet Jun 2026

The FC-51 features a small, blue potentiometer (variable resistor) on the back of the PCB. Turning this potentiometer changes the comparator’s reference voltage, effectively adjusting the sensitivity.

The module typically features a 3-pin header for easy interfacing: Connect to 3.3V - 5V power source. GND: Connect to the circuit ground.

If the reflected signal is strong enough (meaning an object is close), the comparator pulls the Output (OUT) pin LOW . Distance Adjustment

Because the FC-51 outputs a standard digital TTL logic level signal, interfacing it with microcontrollers is highly straightforward. Interfacing with Arduino Fc 51 Ir Sensor Datasheet

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.

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.

The FC-51 is a small, digital output infrared sensor module designed for object detection. It works on the principle of . The module consists of two main parts: The FC-51 features a small, blue potentiometer (variable

Mounted on the front or sides of wheeled robots to prevent collisions.

: Helping vehicles navigate without hitting walls.

The use of an IR LED pair allows the sensor to perform well under moderate ambient light conditions. GND: Connect to the circuit ground

The FC-51 is a digital infrared proximity sensor. It detects obstacles by emitting an infrared signal and sensing the reflected light. It features low power consumption, a small form factor, and simple digital output interface. Key Applications Obstacle avoidance for smart cars and AGVs. Automation: Object counting on conveyor belts. Security: Proximity alarms and boundary detection. Smart Home: Touchless switches and faucet controllers. 2. Technical Specifications

The FC-51 module utilizes an infrared transmitter (IR LED) and an infrared receiver (Photodiode) mounted side-by-side.

void setup() pinMode(sensorPin, INPUT); // Set the sensor pin as an input pinMode(ledPin, OUTPUT); // Set the LED pin as an output Serial.begin(9600); // Start serial communication for debugging