Fc 51 Ir Sensor Datasheet !!top!! Access
The FC-51 is a low-cost, highly efficient infrared (IR) obstacle avoidance sensor module widely used in robotics, automation, and DIY electronics. This module utilizes infrared reflection to detect objects within a specific range, making it an ideal choice for wheeled robots, security systems, and manufacturing line counters. Module Overview and Working Principle
/* FC-51 IR Sensor - Basic Obstacle Detection Assumption: Sensor outputs LOW when object detected. Adjust logic if your sensor is ACTIVE HIGH. */
The FC-51 module works on the principle of .
At roughly 3.1cm x 1.4cm, it easily fits into small robotic chassis or tight assembly line setups. Cons & Limitations
The is a popular, cost-effective module used widely in robotics for obstacle avoidance and proximity detection. Using a simple infrared "reflection" principle, it identifies objects by bouncing IR light off surfaces and measuring the return signal. FC-51 Key Technical Specifications Specification Operating Voltage 3.0V – 6.0V DC Detection Range 2cm – 30cm (Adjustable via onboard potentiometer) Detection Angle Current Consumption ~23 mA at 3.3V; ~43 mA at 5.0V Output Type Digital signal (0 or 1) Onboard IC LM393 Dual Comparator Pinout Configuration Fc 51 Ir Sensor Datasheet
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The is a workhorse of the hobby electronics world. Its datasheet reveals a simple, robust, and cost-effective solution for digital proximity and obstacle detection. With an adjustable range up to 30 cm, TTL-compatible output, and low power consumption, it is ideal for beginners and experts alike.
Detection range varies with object color and reflectivity. Black objects absorb IR and will be detected only at much closer distances (e.g., 2-5 cm), while white objects can be detected up to 30 cm.
You can find the FC-51 IR Sensor at retailers like Art of Circuits or DIY Electronics . Detecting obstacle with IR Sensor and Arduino The FC-51 is a low-cost, highly efficient infrared
Supports a flexible range from 3.0V to 6.0V , making it compatible with both 3.3V (Raspberry Pi/ESP32) and 5V (Arduino) systems.
Power LED (Red) and Obstacle Detection LED (Green/Red depending on the manufacturer) Working Principle The FC-51 operates on the principle of infrared reflection.
Connect the FC-51 sensor to an Arduino board using the following pin map: →right arrow Arduino 5V or 3.3V GND →right arrow Arduino GND OUT →right arrow Arduino Digital Pin 2 Sample Arduino Code
Place your target obstacle at the desired maximum detection distance. Adjust logic if your sensor is ACTIVE HIGH
| Parameter | Value / Range | | :--- | :--- | | | 3.3V to 5V DC | | Current Consumption | 20 mA (typical), 50 mA (peak) | | Detection Distance | 2 cm to 30 cm (0.8” to 12”) | | Adjustable Range | Via onboard potentiometer | | Output Type | Digital TTL (Active LOW – 0V when object detected) | | Output Current | 15 mA (max) | | Response Time | Approximately 10 µs to 50 µs | | Field of View (FOV) | ~35 degrees | | Operating Temperature | -25°C to +85°C | | Board Dimensions | 32 mm x 14 mm x 12 mm | | Mounting Hole Pitch | 22 mm |
The infrared receiver tube accepts the reflected signal.
For more technical resources, including the original LM393 datasheet and application notes on IR reflectance, check the reference links below.
Understanding the FC-51 IR Obstacle Avoidance Sensor: A Comprehensive Datasheet Guide
