QRE1113 Infrared Reflection Sensor Module with Capacitor Discharge Circuit Breaker A compact infrared reflection sensor module based on the QRE1113 element, designed for reliable shortrange reflectance detection. The module integrates a capacitor discharge circuit breaker to stabilize IR LED pulsing and supports DC 3.3 to 5 volts for direct interfacing with common logic levels. Key benefits Accurate reflectance detection: Detects reflected infrared light for object presence, edge sensing, and line following tasks. Wide voltage compatibility: Operates from DC 3.3 to 5V, making it compatible with both 3.3V and 5V systems without additional level shifting. Stable pulsed output and protection: Integrated capacitor discharge circuit breaker helps deliver consistent IR LED pulses and reduces the risk of transient or overload effects. Compact and easy to integrate: Small PCB footprint and standard wiring interface simplify mounting and connection on development boards and prototypes. Practical for hobbyists and engineers: Ready to use in embedded projects, robotics, automation experiments, and vision preprocessing systems. Features and specifications Sensor element: QRE1113 infrared reflection sensor Function: IR LED emitter and photoreceptor pair for reflected light detection Power supply: DC 3.3 to 5V Circuit: Includes capacitor discharge circuit breaker for controlled LED pulsing and circuit protection Interfaces: Standard PCB header wiring for signal, power, and ground Construction: Rugged PCB assembly suitable for bench or indevice use Typical applications Line following robots: Reliable detection of dark and light surfaces for navigation and path control. Conveyor or object counting: Detect reflective objects passing a fixed point for automated counting or sorting. Proximity and edge sensing: Use as a simple proximity switch or to detect tape or markers for positioning in small machines and inspection systems. Who should use this module Hobbyists building robotics or sensing projects Engineers prototyping reflectancebased detection Educators and students implementing embedded sensing labs Included functionality focuses on easy integration, reliable reflectance sensing, and compatibility with a broad range of 3.3V and 5V control systems.