Datasheet — Fc 51 Ir Sensor

The table below compiles the core specifications for the FC-51 module:

To inspire your next build, here are five practical applications:

Connecting the FC-51 to an Arduino is straightforward. Below is the wiring layout and a sample script to get started. 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

However, finding a clear, consolidated datasheet for the FC-51 can be frustrating. Most sellers provide only a pinout diagram. In this post, we have compiled the essential technical specifications, pin configuration, wiring guide, and application tips you would find in a standard datasheet.

Used to adjust the detection range sensitivity. Turning it clockwise increases the detection distance.

The LM393 comparator provides a stable, clean digital output signal.

| Condition | Output Pin | Output LED | | :--- | :--- | :--- | | No object in front | HIGH (1) | OFF | | Object within set range | LOW (0) | ON |

The following sketch reads the digital state of the FC-51 sensor and prints the status to the Serial Monitor. It also illuminates the built-in Arduino LED (Pin 13) when an obstacle is detected.

// Define the sensor connection pin const int SENSOR_PIN = 2; const int ONBOARD_LED = 13; // Built-in LED for visual feedback void setup() // Initialize Serial Monitor for debugging Serial.begin(9600); // Configure the sensor pin as an input pinMode(SENSOR_PIN, INPUT); // Configure the onboard LED as an output pinMode(ONBOARD_LED, OUTPUT); Serial.println("FC-51 IR Sensor Initialized."); void loop() // Read the digital state of the sensor int sensorState = digitalRead(SENSOR_PIN); // FC-51 outputs LOW (0) when an obstacle is detected if (sensorState == LOW) digitalWrite(ONBOARD_LED, HIGH); // Turn on LED Serial.println("Obstacle Detected!"); else digitalWrite(ONBOARD_LED, LOW); // Turn off LED Serial.println("Path Clear."); // Small delay to stabilize serial printing delay(100); Use code with caution. 7. Troubleshooting and Calibration

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

Understanding the FC-51 IR Obstacle Avoidance Sensor: A Comprehensive Datasheet Guide