QRE1113 Infrared Reflection Sensor Module with Capacitor Discharge Circuit Breaker Board Compact, reliable reflection sensing for robotics, automation, and sensing projects. Operates from DC 3.3 to 5V and integrates the QRE1113 IR sensor for consistent proximity and reflectance detection. Key benefits Ready to integrate: accepts DC 3.3 to 5V supply, compatible with common microcontrollers and single board computers for straightforward system connection. Stable IR output: builtin capacitor discharge circuit provides consistent IR LED pulses and reduces voltage stress on the LED, improving repeatability of measurements. Protected operation: the circuit breaker function helps prevent damage from sustained overcurrent conditions, reducing downtime and protecting the module in field use. Small and lightweight: compact PCB and integrated QRE1113 sensor enable installation in constrained spaces and on lightweight platforms. Simple signal use: module produces a clear reflectance signal suitable for digital thresholding or analog measurement, making it adaptable to many control strategies. What it does Emits infrared light with the onboard IR LED and senses reflected light with the QRE1113 phototransistor element to detect surface presence, contrast, or proximity. Uses a capacitor discharge circuit to drive the IR LED in controlled pulses and a circuit breaker mechanism to limit sustained current, improving reliability. Outputs a sensor signal compatible with typical logic levels when used within the DC 3.3 to 5V supply range. Compatibility and materials Module designed to work with 3.3V and 5V logic systems and standard microcontroller inputs. Constructed on a printed circuit board with integrated QRE1113 IR package and supporting passive components for reliable electrical performance. Suitable for integration into prototypes, custom PCBs, and breadboard setups with appropriate connectors or wiring. Performance highlights Reliable shortrange reflectance sensing for dark and light surface detection. Pulsed IR drive improves measurement stability under variable supply conditions. Circuit breaker board reduces risk of failure from prolonged LED drive or wiring faults. Typical applications Line following robots: detect contrast between track and background for navigation and steering control. Object detection on small conveyors: trigger sorting or counting when items pass within the sensor range. Proximity sensing for automation: detect presence or absence of parts in pick and place operations or as a simple limit sensor. What you will receive QRE1113 IR reflection sensor module assembled on a capacitor discharge circuit breaker PCB, ready for wiring to a 3.3 to 5V supply and a controller input. Integration tips Use stable supply rails within the specified DC 3.3 to 5V range. Place the sensor close to the target surface and adjust thresholding in software or hardware to account for surface color and reflectivity. Keep wiring short and use common ground connections between the module and the controller for reliable readings. This module provides a compact, protected, and easy to integrate solution for reliable shortrange reflection sensing using the QRE1113 IR sensor and a capacitor discharge circuit breaker board.