Fc 51 Ir Sensor Datasheet !!better!! [2K • 1080p]

is a popular infrared (IR) obstacle avoidance sensor module commonly used in robotics for proximity detection and line tracking. It functions by emitting an IR signal and measuring the reflected light to identify objects within its field of view. Technical Specifications

The following data reflects standard ratings for the FC-51 module:

The FC-51 is a popular infrared (IR) obstacle avoidance sensor module commonly used in Arduino and robotics projects. It uses an IR transmitter (LED) and receiver (phototransistor) to detect objects within a specific range by measuring the reflection of infrared light. Technical Specifications

Based on the FC-51 IR Sensor Overview, the core technical data is as follows: Operating Voltage: 3.3V to 5V DC.

Detection Range: Adjustable from 2cm to 30cm (some variants reach up to 80cm). Detection Angle: Approximately 35°.

Output Signal: Digital signal (LOW when an obstacle is detected, HIGH when the path is clear).

Comparator Chip: Typically utilizes an LM393 voltage comparator for stable digital switching.

Potentiometer: Includes an onboard "blue trim pot" used to adjust the sensor's sensitivity/range. Pin Configuration

The module typically features a 3-pin header for easy interfacing: VCC: Connect to 3.3V - 5V power source. GND: Connect to the circuit ground.

OUT: Digital output pin to be connected to an Arduino digital I/O. Working Principle Emission: The IR LED constantly emits infrared light.

Reflection: When an object enters the detection range, the IR light reflects back.

Detection: The phototransistor receives the reflected light, and the onboard comparator compares this signal against the threshold set by the potentiometer.

Action: If the reflected intensity is high enough, the OUT pin goes LOW and the onboard "Status LED" lights up. Infrared Sensors Specs, Operation, Types and Applications

The FC-51 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 Fc 51 Ir Sensor Datasheet

Digital signal (LOW when obstacle detected, HIGH when clear) Dimensions PCB: 3.1 cm x 1.4 cm; Overall: 4.5 cm x 1.4 cm x 0.7 cm Interface and Components Pinout: VCC: Power input (3.3V - 5V). GND: Ground connection. OUT: Digital output pin. Onboard Indicators: Power LED: Remains lit while the module is powered.

Obstacle LED: Lights up only when an object is detected within the set range.

Adjustment: A multi-turn potentiometer (blue trim pot) is used to increase (clockwise) or decrease (counter-clockwise) the sensitivity and detection distance. Operational Notes

Key Features:

Infrared Detection: The FC-51 IR sensor uses infrared radiation to detect objects or obstacles.
Adjustable Sensitivity: The sensor has an adjustable potentiometer to adjust the sensitivity of detection.
Digital Output: The sensor provides a digital output signal ( HIGH/LOW) indicating the presence or absence of an object.
Operating Voltage: The sensor operates at a voltage range of 3.3V to 5V DC.
Current Consumption: The sensor consumes a low current of around 20-30mA.
Detection Range: The detection range of the FC-51 IR sensor is approximately 2-30cm (adjustable).

Technical Specifications:

Emitter: Infrared LED
Detector: Photodiode
Wavelength: 950nm
Operating Temperature: -20°C to 80°C
Storage Temperature: -20°C to 80°C

Applications:

Robotics: Obstacle detection, line following, and tracking objects.
Proximity sensing: Detecting the presence or absence of objects.
Industrial automation: Detecting objects, monitoring production lines.
Security systems: Intrusion detection, motion detection.

Datasheet:

If you're looking for the official datasheet of the FC-51 IR sensor, you can search for it on various online platforms, such as:

Google search: "FC-51 IR Sensor Datasheet"
Electronics component websites: Adafruit, SparkFun, or RobotShop
Chinese electronics marketplaces: AliExpress, BangGood

Keep in mind that the datasheet may vary depending on the manufacturer or the specific version of the sensor.

is a popular infrared (IR) obstacle avoidance sensor module commonly used in robotics for object detection and line tracking Inforbatista

. It consists of an IR transmitter and receiver pair, using a comparator circuit (LM393) to provide a simple digital output Ktechnics Systems Technical Specifications Operating Voltage: 3.0V to 6.0V DC Current Consumption: approximately at 3.3V and Detection Range: 2 cm to 30 cm (adjustable via onboard potentiometer) Art of Circuits Detection Angle: Output Signal: Digital (High = No Obstacle, Low = Obstacle Detected) Art of Circuits Dimensions: Approximately 43mm x 16mm x 7mm Радіокомпоненти Pinout & Hardware Features

The module uses a standard 3-pin male header for easy connection Art of Circuits ir sensor.docx - Slideshare

The FC-51 IR Sensor 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 is a popular infrared (IR) obstacle avoidance sensor

The module typically features a 3-pin interface, making it easy to wire to microcontrollers like Arduino: VCC: External 3.3V – 5V power supply. GND: External ground connection.

OUT: Digital output pin. It outputs a LOW signal when an obstacle is detected and HIGH when the path is clear. How It Works

The FC-51 consists of an infrared transmitter (transparent LED) and an infrared receiver (black photodiode).

Emission: The transmitter continuously sends out IR waves at a specific frequency.

Reflection: When an object enters the detection range, the IR waves bounce off the object’s surface.

Reception: The receiver tube picks up these reflected waves.

Comparison: The onboard LM393 comparator processes this signal. If the reflected light intensity exceeds the threshold set by the potentiometer, the module triggers the OUT pin to LOW and lights up the onboard "Obstacle" LED. Common Applications

Obstacle Avoidance Robots: Helping vehicles navigate without hitting walls.

Production Lines: Counting objects passing on an assembly line.

Security Systems: Acts as a simple "tripwire" for entry detection.

Proximity Sensing: Triggering actions when a user's hand or an object gets close. Quick Tips for Use

Calibration: Use the onboard potentiometer to adjust sensitivity. Turning it clockwise usually increases the detection distance.

Material Sensitivity: Black or dark objects absorb IR light and may not be detected as easily as white or reflective surfaces. Infrared Detection : The FC-51 IR sensor uses

Ambient Light: While designed to be stable, extreme ambient light (like direct sunlight) can sometimes interfere with the IR receiver.

You can find the FC-51 IR Sensor at retailers like Art of Circuits or DIY Electronics. Detecting obstacle with IR Sensor and Arduino

1. Overview

The FC-51 is an infrared sensor module capable of detecting obstacles in front of it. It works by emitting an infrared signal (via an IR LED) and detecting the reflection (via a phototransistor). If the signal reflects off an object, the sensor outputs a digital signal.

2. Pin Configuration

The module typically comes with a 3-pin male header interface:

VCC: Power supply input (typically 3.3V to 5V).
GND: Ground connection.
OUT: Digital Output (Low when obstacle detected, High when clear).

Introduction

In the world of embedded systems and robotics, obstacle detection is one of the most fundamental requirements. Among the myriad of sensors available for this task, the FC-51 IR Sensor Module stands out as one of the most popular, affordable, and reliable choices for hobbyists and professionals alike.

Whether you are building a line-following robot, a proximity-based alarm, or a contactless tachometer, you will likely encounter the FC-51 module. However, to harness its full potential, one must understand its technical specifications, pin configuration, working principle, and interfacing details—all of which are found in its official datasheet.

This article serves as an exhaustive FC-51 IR Sensor Datasheet and application guide. We will dissect every parameter, explore circuit diagrams, provide code examples (Arduino), and answer frequently asked questions.

2. FC-51 Sensor Pinout

Before diving into the datasheet numbers, let's look at the physical interface. The FC-51 module typically has three pins (although some variants have 4, with an extra analog output pin).

Note on 4-pin versions: Some FC-51 modules break out an additional AOUT pin, which provides the raw analog voltage from the phototransistor before it goes into the comparator. This can be used for measuring distance more precisely.

Hidden trade-offs — where the user pays in performance

Simplicity versus accuracy: the FC-51 trades measurement fidelity for ease of use. You gain simplicity but lose predictable, repeatable sensing unless you add calibration and environmental control.
Low cost versus quality: In mission-critical systems, the module’s variability and sensitivity to environment make it a poor primary sensor without redundancy.

2. Interfacing with Raspberry Pi (3.3V Logic)

The FC-51 can run on 3.3V, making it safe for Pi GPIO. Use the same pinout but connect VCC to 3.3V.

Python Sample Code (using RPi.GPIO):

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
SENSOR_PIN = 17
GPIO.setup(SENSOR_PIN, GPIO.IN)
try:
while True:
if GPIO.input(SENSOR_PIN) == GPIO.LOW:
print("Object detected")
else:
print("Clear")
time.sleep(0.1)
except KeyboardInterrupt:
GPIO.cleanup()

Feature Overview: FC-51 Infrared (IR) Obstacle Avoidance Sensor

Practical implications and design guidance

For reliable operation, always test sensors under representative lighting and with the actual materials in your application.
Use modulation/demodulation (IR carrier + synchronous detection) or shielded housings if outdoor or variable-light use is required.
Combine multiple sensors or complementary modalities (ultrasonic, time-of-flight) for robust obstacle detection or distance estimation.
Prefer analog output versions if you need graded distance sensing and can implement signal processing in firmware.
Add hysteresis or smoothing in firmware to prevent chatter around threshold points when using the digital output.

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