QTR 8RC Line Follower Sensor

The QTR-8RC Line Follower Sensor is an 8-channel infrared reflectance sensor array designed for accurate and fast line detection. It is widely used in line-following robots, autonomous vehicles, and educational robotics projects.
Each sensor detects the difference between light and dark surfaces by measuring reflected IR light, making it ideal for tracking black lines on white backgrounds (or vice versa).

The QTR-8RC uses RC (resistor-capacitor) timing based digital outputs, allowing it to work without an analog input, and making it compatible with most microcontrollers.

Key Features

• 8 IR sensor channels for high-precision line detection

•  RC digital output – no ADC required

•  Works with 3.3V & 5V logic levels

•  Fast response time for smooth robot movement

•  Compact & lightweight design

•  Compatible with Arduino, ESP32, Raspberry Pi, STM32, and more

• Supports popular QTR sensor libraries

Technical Specifications

• Number of Sensors: 8

• Operating Voltage: 3.3V – 5V DC

• Output Type: Digital (RC timing based)

• Optimal Sensing Distance: ~3 mm

• Maximum Sensing Distance: ~9 mm

• Sensor Spacing: ~9.5 mm

• Current Consumption: Approx. 100 mA (all IR LEDs ON)

Applications

•  Line-following robots

•  Autonomous and smart vehicle projects

• Robotics learning & STEM education

•  Edge detection systems

•  DIY electronics & research projects

Why Choose QTR-8RC?

• Provides more accurate line position data than single or dual sensors

• Ideal for PID-controlled robots

• Eliminates the need for analog inputs

• Trusted design used in competitions and educational kits

Package Includes

• 1 × QTR-8RC Line Follower Sensor Module