The FC-51's simplicity and low cost make it suitable for a wide range of applications across robotics, automation, and education.
Increases the reference threshold, making the sensor more sensitive and increasing the effective detection distance.
| Parameter | Value | |-----------|-------| | Response Time | ~2–10 ms | | Output Frequency | ~50–100 Hz (typical) | | Settling Time after power-up | <50 ms |
The is a cost-effective, reliable solution for proximity detection, offering adjustable ranges up to 30cm. Its simple 3-pin interface and digital output make it perfect for integrating obstacle avoidance into various automation and robotic projects.
The module typically features a 3-pin male header for easy connection to microcontrollers like Arduino or Raspberry Pi: Description Power Supply 3.3V - 5V DC input. GND Common ground connection. OUT Digital Output Goes LOW when an object reflects IR light. Working Principle Fc 51 Ir Sensor Datasheet
Allows users to manually adjust the sensitivity and detection distance. LED Indicators:
Mounted on the front or sides of wheeled robots to prevent collisions.
The FC-51 IR sensor boasts several key features that make it an attractive choice for various applications:
Clockwise rotation increases detection distance; counter-clockwise decreases it. How the FC-51 Sensor Works The FC-51's simplicity and low cost make it
2cm to 30cm (Adjustable via onboard potentiometer) Detection Angle: 35° Effective angle Operating Temperature: -10°C to +50°C Dimensions: 32mm 5mm (L x W x H) Weight: ~3 grams Pin Configuration and Layout
| Parameter | Min | Typical | Max | Unit | Conditions | | :--- | :--- | :--- | :--- | :--- | :--- | | | 3.0 | 5.0 | 5.5 | V | – | | Supply Current (Icc) | 15 | 23 | 35 | mA | No load, LED on | | Output Voltage High (VOH) | Vcc - 0.5 | Vcc - 0.2 | – | V | Iout = 0 mA | | Output Voltage Low (VOL) | – | 0.1 | 0.4 | V | Iout = 15 mA | | Output Current (Source/Sink) | – | 15 | 20 | mA | – | | Detection Range (White paper) | 2 | – | 30 | cm | Adjustable via potentiometer | | Detection Range (Black surface) | 1 | – | 8 | cm | Lower reflectivity | | Frequency of IR carrier | – | 38 | – | kHz | Modulated signal | | Operating Temperature | -10 | 25 | 70 | °C | – | | Response Time | – | 2 | 5 | ms | Depends on comparator slew rate |
Suitable for obstacle detection at low to medium speeds (e.g., small robots, conveyor belts).
Illuminates when an obstacle is detected within the set threshold. Its simple 3-pin interface and digital output make
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Based on the FC-51 IR Sensor Overview , the core technical data is as follows: 3.3V to 5V DC.
If the reflected light is strong enough to pass the threshold, the LM393 pulls the OUT pin LOW and illuminates the green "Obstacle" LED. The Impact of Color and Material
This simple sketch prints "OBSTACLE!!" to the serial monitor when an object is detected.
