The QTRX-MD-13A is a 13-channel reflectance sensor array designed for line-following robots and reflectance detection applications. It uses high-performance QTRX sensor modules with lenses, providing strong performance at a low 3.5 mA LED current per channel. The analog voltage output (0 V to VCC) can be read directly by a microcontroller's ADC.

The array features integrated LED drivers with 32-level brightness dimming, independent of supply voltage. With 13 sensors at 8 mm pitch, separate odd/even emitter control pins allow advanced sensing configurations such as detecting reflections at different angles.

Key Features

• 13 QTRX Sensors – High-performance modules with lenses for low-current operation
• 8 mm Pitch – Medium-density sensor spacing
• Analog Output – 0 V (strong reflectance) to VCC (no reflectance)
• Operating Voltage – 2.9 V to 5.5 V
• LED Current – 3.5 mA per emitter (full brightness)
• Max Board Current – 31 mA
• 32-Level Dimming – Independent brightness control via CTRL pins
• Odd/Even Emitter Control – Separate CTRL ODD and CTRL EVEN pins
• Optimal Sensing Distance – 10 mm (max 40 mm)
• Dimensions – 101.0 × 16.5 × 3.0 mm
• Weight – 6.2 g

Ideal For

• Line-following robots
• Edge detection and surface tracking
• Proximity and presence sensing
• Reflectance-based colour sorting

Package Contents

• 1× QTRX-MD-13A Reflectance Sensor Array

Resources

• Arduino Library Documentation
• Dimension Diagram (PDF)