Fc 51 Ir Sensor Datasheet Updated -

Based on your request, here is the technical information and specification summary for the FC-51 Infrared Obstacle Avoidance Sensor Module.

This module is widely used in robotics (for line following or obstacle avoidance) and is based on the TCRT5000 IR sensor.

Limitations:

• Ambient IR Interference: Sunlight or incandescent bulbs contain strong IR. This can cause false triggering. Use the sensor indoors or shield it.
• Color Sensitivity: Black or dark blue objects are nearly invisible to the sensor at longer ranges.
• No Distance Measurement: The digital output only says "object present" or "not present" at a set threshold. For analog distance, use an analog IR sensor.
• Cross-Talk: When using multiple FC-51 sensors close together, their IR beams can interfere. Stagger them or use different modulation frequencies.

What is the FC-51?

The FC-51 is an analog/digital infrared (IR) sensor module designed for short-range obstacle detection (2 cm to 30 cm). Unlike Sharp GP2Y0 series sensors (which give analog distance values), the FC-51 typically outputs a simple TTL digital signal (HIGH/LOW) when an object is within a preset threshold.

Key Components on Board:

• Transmitter: 940nm IR LED
• Receiver: Matched phototransistor or TSOP IR receiver
• Comparator: LM393 Dual Differential Comparator (handles signal conditioning)
• Potentiometer: Blue trimpot to adjust sensitivity (distance threshold)
• Power Indicator (Green) & Output Indicator (Red)

1. Interfacing with Arduino Uno (5V Logic)

| FC-51 Pin | Arduino Pin | | :--- | :--- | | VCC | 5V | | GND | GND | | OUT | Digital Pin 2 (or any digital input pin) |

Arduino Sample Code:

int sensorPin = 2;
int ledPin = 13;
int sensorState = 0;
void setup() 
pinMode(sensorPin, INPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600);

void loop() 
sensorState = digitalRead(sensorPin);
if (sensorState == LOW)   // Object detected
digitalWrite(ledPin, HIGH);
Serial.println("Object Detected!");
 else                    // No object
digitalWrite(ledPin, LOW);
delay(50);

11. Frequently Asked Questions (FAQ)

Q1: What is the difference between FC-51 and LM393 IR sensor? A: "LM393" refers to the comparator IC. Many IR sensor modules (including FC-51) use the LM393. FC-51 is a specific board layout and component selection.

Q2: Can I use the FC-51 with 3.3V logic (e.g., ESP32, Raspberry Pi Pico)? A: Yes. The FC-51 operates from 3.3V to 5V. Connect VCC to 3.3V, and the OUT pin will output 3.3V logic HIGH, safe for 3.3V microcontrollers.

Q3: How to get an analog output from FC-51? A: If your module has an AOUT pin, read it using an ADC pin. If not, you can solder a wire directly to the phototransistor's collector or the comparator's non-inverting input. Fc 51 Ir Sensor Datasheet

Q4: Why does my sensor detect objects even when nothing is there? A: You may have set the sensitivity too high. The sensor is detecting the floor or table surface. Turn the potentiometer counter-clockwise until the detection stops.

Q5: Can FC-51 detect transparent objects like glass? A: Not reliably. Glass reflects very little IR. It may detect the glass if the angle is steep, but generally, it is not suitable for transparent objects.

Q6: What is the maximum refresh rate? A: Approximately 500 Hz (2 ms response time). You can read it reliably at intervals of 10 ms or more.

Standard Pinout (Version A – Most Common)

| Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | OUT | Digital output signal (HIGH = no object, LOW = object detected) | | 2 | VCC | Power supply input (3.3V or 5V) | | 3 | GND | Ground (0V) |

10. Limitations & Troubleshooting (From Datasheet Warnings)

Every engineer must know the limitations documented in the FC-51's fine print.

Where to find official datasheet

Search the module name "FC-51 IR sensor datasheet" plus the vendor name or part number printed on the PCB; look for PDF datasheets from electronics suppliers or manufacturers.

Related search suggestions will be provided.

Overview

The FC-51 IR sensor is a reflective infrared sensor that can detect the presence of objects within a certain range. It is commonly used for obstacle detection, line following, and other applications.

Datasheet Analysis

The datasheet for the FC-51 IR sensor provides the following key specifications:

1. Operating Voltage: 3.3V to 5V
2. Current Consumption: 20mA to 30mA
3. Detection Range: 2cm to 30cm (adjustable)
4. Output: Digital output ( HIGH/LOW)
5. Sensing Angle: approximately 30 degrees

Features

The FC-51 IR sensor has the following features:

1. Easy to use: The sensor has a simple digital output that can be easily interfaced with microcontrollers.
2. Adjustable sensitivity: The detection range can be adjusted using a potentiometer.
3. Low power consumption: The sensor consumes relatively low power, making it suitable for battery-powered projects.

Applications

The FC-51 IR sensor can be used in various applications, including:

1. Robotics: obstacle detection, line following, and wall detection.
2. Automation: presence detection, distance measurement, and object detection.
3. Proximity sensing: detecting the presence of objects within a certain range.

Limitations

The FC-51 IR sensor has some limitations:

1. Limited range: The detection range is limited to 2cm to 30cm.
2. Interference: The sensor may be affected by ambient light, dust, and other environmental factors.

Conclusion

The FC-51 IR sensor is a reliable and easy-to-use infrared sensor module suitable for various robotics and automation projects. Its simple digital output and adjustable sensitivity make it a popular choice among hobbyists and professionals. However, its limited range and potential interference from environmental factors should be considered when designing applications.

Rating: 4.5/5

Recommendation: The FC-51 IR sensor is recommended for projects that require simple proximity sensing, obstacle detection, or line following. However, for more complex applications or longer detection ranges, alternative sensors may be more suitable.

Key Features:

1. Infrared Detection: The FC-51 IR sensor uses infrared radiation to detect objects or obstacles.
2. Adjustable Sensitivity: The sensor has an adjustable potentiometer to adjust the sensitivity of detection.
3. Digital Output: The sensor provides a digital output signal ( HIGH/LOW) indicating the presence or absence of an object.
4. Operating Voltage: The sensor operates at a voltage range of 3.3V to 5V DC.
5. Current Consumption: The sensor consumes a low current of around 20-30mA.
6. 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:

1. Robotics: Obstacle detection, line following, and tracking objects.
2. Proximity sensing: Detecting the presence or absence of objects.
3. Industrial automation: Detecting objects, monitoring production lines.
4. 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, low-cost infrared (IR) obstacle avoidance sensor module commonly used in robotics and DIY electronics for proximity detection. It operates by emitting an IR signal and detecting the reflection from nearby objects. Technical Specifications

The module is designed for simple "object vs. no object" detection rather than precise distance measurement. Specification Operating Voltage 3.0V – 6.0V DC Current Consumption ~23 mA at 3.3V; ~43 mA at 5.0V Detection Range 2cm – 30cm (adjustable via potentiometer) Detection Angle LM393 Voltage Comparator Output Type Digital (HIGH/LOW) Board Dimensions ~3.1cm x 1.4cm (PCB) Pinout and Indicators

The module features a standard 3-pin male header for easy interfacing.

FC-51 IR Proximity Sensor - am I doing it wrong? - Arduino Forum

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

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

How to Read the Output (Logic Table)

The FC-51 uses Active LOW logic. This is crucial for programming. Based on your request, here is the technical

| Condition | Output Pin State | Indicator LED (Red) | What it means | | :--- | :--- | :--- | :--- | | No object | HIGH (1 / 3.3-5V) | OFF | Path is clear | | Object detected | LOW (0 / 0V) | ON | Object is within threshold |