SB040202025 – REFLECTIVE OBJECT SENSOR SCHEMATIC BLOCK

This schematic block features the QRE1113GR, a miniature reflective infrared object sensor that’s ideal for proximity detection, line-following, and surface sensing in embedded systems and robotics. It integrates an IR LED emitter and a phototransistor detector in a single SMD package, enabling non-contact detection of nearby surfaces by measuring reflected infrared light.

Designed for compact integration, this breakout-style module exposes the LED’s anode/cathode and the phototransistor’s collector/emitter, making it easy to interface with a microcontroller or analog front-end. With its simple phototransistor output, it can be used in circuits with pull-up resistors or as part of comparator-based digital detection.

The QRE1113GR is widely used in automation, line sensors, and consumer electronics due to its low cost, small size, and reliable reflective sensing performance.

Key Features:

• Reflective IR optical sensor (emitter + phototransistor)
• Non-contact object detection
• SMD “gull‑wing” package
• Phototransistor output for simple analog/digital integration
• High maximum voltage across collector-emitter (~30 V)
• Emitter drive current up to ~50 mA
• Operating ambient temperature: –40 °C to +85 °C
• Compact footprint suitable for tight layouts

Typical Applications:

• Line-following robots and mobile platforms
• Proximity or object-detection systems
• Optical encoders, tape sensors, or shaft encoders
• Surface reflectivity measurement
• Embedded automation and sorting systems
• Consumer electronics user-interface detection