5-Way Black and White Line Identification Sensor Module TCRT5000

Overview

The TCRT5000 Line Tracking Sensor Module is an infrared reflective sensor module commonly used in robotics and smart car projects for line-following applications. It detects differences between black and white surfaces by measuring reflected infrared light.

This module is widely used in:

• Line-following robots

• Obstacle and edge detection systems

• Path tracking intelligent cars

• Automation and DIY robotics projects

2. Key Features

• Uses TCRT5000 infrared reflective sensor

• Detects black and white surfaces with high sensitivity

• Adjustable detection sensitivity via onboard potentiometer

• Digital output (HIGH/LOW)

• Onboard power indicator LED

• Onboard signal indicator LED

• Easy interface with microcontrollers (Arduino, Raspberry Pi, etc.)

3. Specifications

• Operating Voltage: 3.3V – 5V DC

• Output Type: Digital (TTL level)

• Detection Distance: 1mm – 25mm (adjustable)

• Comparator IC: LM393

• Infrared wavelength: 950nm

• Response Time: Fast switching

4. Pin Configuration

5. Working Principle

The module works on infrared reflection:

• The IR LED emits infrared light.

• When placed over a white surface, most of the IR light is reflected back to the phototransistor → output changes state.

• When placed over a black surface, most of the IR light is absorbed → little reflection → output changes state.

The onboard LM393 comparator compares the signal with an adjustable reference voltage set by the potentiometer and outputs a clean digital signal.

6. Output Behavior

(Note: Output logic may vary slightly depending on adjustment.)

7. Applications

• Line-following robot cars

• Edge detection (cliff detection robots)

• Conveyor belt tracking

• Position detection systems

• DIY robotics projects

8. Advantages

• Low cost

• Simple interface

• Compact size

• Adjustable sensitivity

• Reliable for short-distance detection