• Real-time, precise line detection with a digital 5-K sensor module to recognize black and white lines for accurate navigation • Five grayscale sensors provide stable digital outputs and enable simultaneous monitoring of multiple lines, improving reliability • Easy integration with microcontrollers and control systems through digital outputs, suitable for common development platforms • Wide applicability in intelligent vehicles, robotics, and automated navigation systems for tasks such as line following, obstacle avoidance, and route finding • Designed for electronics enthusiasts and STEM students, offering a practical tool to learn and implement line-sensing technology Use scenarios • Line-following robots and automated guided vehicles (AGVs) in education kits, classrooms, or light industrial settings • Obstacle avoidance and path planning for compact autonomous robots and mobile platforms • STEM learning projects and hobbyist experiments to explore line-sensing technology and navigation concepts