| Parameter | Value / Description | | :--- | :--- | | | FC-51 | | Comparator IC | LM393 | | Operating Voltage | 3.0V – 6.0V DC (5V typical) | | Current Consumption | ~23 mA at 3.3V / ~43 mA at 5.0V | | Detection Range | 2 cm to 30 cm (Adjustable) | | Detection Angle | 35° | | Output Type | Digital switching output (0 and 1) | | Output Logic | Active LOW (0V) when obstacle detected; inactive HIGH (5V) when clear | | PCB Dimensions | 3.1 cm (L) x 1.4 cm (W) | | Overall Dimensions | ~4.5 cm x 1.4 cm x 0.7 cm | | Mounting | 3 mm mounting holes |
FC-51 IR Sensor Datasheet: Comprehensive Guide to the Infrared Obstacle Avoidance Module
Direct sunlight or heavy incandescent lighting contains large amounts of infrared radiation. This can flood the photodiode and cause false triggers. For outdoor use, shield the sensor housing from direct sunlight. Common Applications
Turn the potentiometer clockwise to increase sensitivity. Verify that your VCC pin is supplying a stable 5V. Scenario C: Unreliable behavior under bright lighting Fc 51 Ir Sensor Datasheet
Illuminates when the module is correctly powered.
The effective detection distance varies based on the reflective properties of the target obstacle. Highly reflective, light-colored objects (like white paper) provide the maximum detection range, while dark, light-absorbing surfaces (like black rubber) drastically reduce the detection range. 3. Pin Configuration
The physical PCB board hosts several distinct elements designed to assist in calibration: distance with ir sensor fc-51 - Arduino Forum | Parameter | Value / Description | |
+-------------------+ | [FC-51 Module] | | | | [VCC] [GND] [OUT]| +----+-----+-----+--+ | | |
Counts items moving down a factory line as they interrupt the IR beam.
The FC-51 has a simple 3-pin interface, making it easy to connect to almost any microcontroller (MCU). The effective detection distance varies based on the
Used in specialized configurations to detect lines. 6. Arduino Interface Example
Unlike analog IR sensors (such as the TCRT5000-based modules), the FC-51 includes an onboard comparator circuit (typically an LM393 chip) that converts the analog signal from the phototransistor into a clean digital output. This makes it extremely easy to interface with microcontrollers like Arduino, Raspberry Pi, ESP32, or STM32.
The following technical data is derived from standard FC-51 datasheets :
The is a low-cost infrared (IR) obstacle avoidance sensor module commonly used in robotics for short-range detection. It functions by emitting an IR signal from a transmitter LED; if an object is within range, the IR light reflects back and is detected by a receiver phototransistor, triggering a digital signal . Core Technical Specifications Specification Operating Voltage 3.0V – 6.0V DC Detection Range 2cm – 30cm (Adjustable via onboard potentiometer) Detection Angle Approximately 35° Current Consumption ~23 mA at 3.3V / ~43 mA at 5.0V Output Type
Turn the potentiometer counter-clockwise until the indicator LED turns off, then test with an object.