SparkFun QRE1113 Line Sensor Breakout Board, Digital Output

The SparkFun QRE1113 Line Sensor Breakout Board is designed for simple digital line sensing in robotics and automation applications. This compact board features a QRE1113 IR reflectance sensor that provides a digital output signal, making it compatible with both 3.3V and 5V microcontroller systems.

At its core, the sensor consists of an IR emitting LED paired with an IR-sensitive phototransistor. The clever circuit design ties the phototransistor output to a 10nF capacitor - the discharge rate of this capacitor indicates surface reflectivity. On highly reflective white surfaces, the capacitor discharges quickly, while black surfaces result in slower discharge rates, enabling accurate line detection.

Key Features

• Digital output for easy integration with microcontrollers
• Compatible with both 3.3V and 5V systems
• 3mm optimal sensing distance for reliable detection
• Compact design with convenient 0.1-pitch header for easy connection
• Includes mounting hole for permanent installation

With dimensions of just 7.6 x 14mm, this breakout board offers a space-saving solution for line-following robots and other reflective surface detection applications where digital I/O is preferred.

Contents Included

• QRE1113 Breakout Board (sensor itself not included)