QRE1113 Infrared Reflective Cliff Sensor Module Digital Line Tracker

🔧 QRE1113 Infrared Reflective Cliff Sensor Module | AuscomTech

This QRE1113 module is a compact infrared reflective sensing board with a digital capacitor discharge output.

It detects reflected IR light from nearby surfaces, allowing a microcontroller to identify changes between floor, edge, surface colour, and reflectivity.

It is suitable for small robotics projects where it can be used as a cliff sensor, edge detector, or line tracking sensor with Arduino, ESP32, Raspberry Pi Pico, and similar controllers.

⭐ Key Features

• Cliff Detection Use – can help detect floor edges or drop-offs by sensing loss of reflected infrared light.
• Digital Output Circuit – uses capacitor discharge timing, so no ADC input is required.
• Infrared Reflective Sensing – onboard IR LED and phototransistor detect reflected light from nearby surfaces.
• Robot Line Tracking – useful for black and white surface detection in line follower robots.
• 3.3V and 5V Compatible – works with many common microcontroller platforms.
• Compact PCB – small board with 3-pin connection and mounting hole for easy robot installation.

📊 Technical Specifications

• Sensor Type: Infrared reflective sensor module
• Sensor IC: QRE1113
• Output Type: Digital capacitor discharge output
• Operating Voltage: DC 3.3V to 5V
• Supply Current: approx. 25mA
• Onboard LED Resistor: 100Ω
• Capacitor: 10nF
• Interface: 3-pin 0.1 inch header
• Pins: VCC, GND, OUT
• Optimal Sensing Distance: approx. 3mm / 0.125 inch
• Board Size: approx. 14.2 × 8.0mm
• ADC Required: No
• Mounting: Single mounting hole

🧩 Typical Applications

• Robot cliff detection
• Edge and drop-off sensing
• Line follower robots
• Black and white surface detection
• Short-range reflective object sensing
• Floor presence detection for small robots
• Arduino, ESP32, STM32, and Raspberry Pi Pico projects

⚠️ Important Notes

• For cliff sensing, mount the sensor close to the floor and test detection distance on the actual surface material.
• Surface colour, texture, angle, ambient light, and floor reflectivity will affect performance.
• This module is best suited to short-range sensing at approximately 3mm from the target surface.
• Use multiple sensors if your robot needs wider edge coverage or more reliable drop-off detection.
• Header pins may require soldering depending on supplied batch.

📦 Package Includes

• 1 × QRE1113 Infrared Reflective Sensor Module
• 1 × 3-Pin Header

🔗 Recommended Accessories (Not Included)

• Arduino UNO or Nano – robot control and sensor testing
• ESP32 development board – wireless robot projects
• Jumper wires – quick connection to controller boards
• Robot chassis kit – mobile platform for cliff detection projects