The Pololu QTR-3A Reflectance Sensor Array is a compact module designed for line-following robots, featuring three IR LED/phototransistor pairs on a small board. Each sensor provides an analog voltage output, making it suitable for detecting lines or general proximity and reflectance. The sensors are spaced to align with common line-following courses, enhancing its utility in robotics applications. The module can interface with microcontrollers through analog-to-digital converters or comparators, offering flexibility in integration. It includes mounting holes and header strips for easy installation and connectivity.
