The FC-51 IR Obstacle Avoidance Sensor Module is a highly versatile, budget-friendly electronic component designed for distance detection and proximity sensing. Featuring an onboard infrared transmitter (clear LED) and an infrared receiver (black photodiode), this module is a core building block for robotics, smart automation, and basic DIY electronics.
It works by emitting an infrared signal; when an object enters the detection range, the signal reflects back to the receiver, triggering the output pin. It is highly popular for line-following robots, smart cars, and non-contact switch applications.
Key Features:
Adjustable Sensitivity: Equipped with a built-in potentiometer (the blue dial) to easily adjust the detection distance threshold based on your project requirements.
Dual Indicator LEDs: Features a power indicator light and an onboard status output light that illuminates when an obstacle is detected.
Digital Output: Simple 3-pin configuration (VCC, GND, OUT) outputs a clean, logic-level digital signal (LOW when an obstacle is detected).
Broad Compatibility: Seamlessly interfaces with Arduino, Raspberry Pi, ESP32, PIC, and standard microcontroller boards.
Technical Specifications:
Model: FC-51
Operating Voltage: DC 3.3V to 5V
Detection Distance Range: 2cm to 30cm (Adjustable via potentiometer)
Detection Angle: 35°
Output Type: Digital Level Output (Low / High)
Dimensions: 3.2cm x 1.4cm