The QTRX-HD-06A Reflectance Sensor Array from Pololu is a small board featuring six reflectance sensors on a 1.75" × 0.8" board. It is ideal for detecting line edges and interpreting simple two-color line codes. The reflectance sensors provide proportional analog voltage outputs that vary based on the reflectance of the surface below them. This makes them ideal for use in line-following applications, as well as simple color recognition. The board is powered by 3–5.5V, making it compatible with a variety of microcontrollers. Additionally, with the included 0.1" right-angle female header, the Reflectance Sensor Array is easily integrated into any project.