Cytron Maker Reflect IR Reflectance Sensor for Beginner

Overview

The Cytron Maker Reflect IR Reflectance Sensor is a compact analog infrared reflectance sensor designed for surface detection and line tracking, especially for beginners.

• Detects surface reflectivity (black vs white)

• Provides analog voltage output

• Designed for robotics, education, and embedded systems

Focused on simple learning + accurate analog sensing

Working Principle

• Contains:

  • IR LED (emitter)

  • Phototransistor (receiver)

   

• Operation:

  • IR light is emitted toward surface

  • Reflected light is measured

   

• Behavior:

  • White surface more reflection lower output voltage

  • Black surface less reflection /ul>

    Output varies continuously enables precise sensing (not just ON/OFF)

    Measurement Characteristics

    • Sensing Method: Infrared reflectance

    • Detection Type: Surface contrast (light vs dark)

    • Optimal Distance: ~3 mm from surface

    • Effective Range: ~1 mm to 40 mm (best at close range)

    Works best on flat, consistent surfaces

    Output Characteristics

    • Output Type: Analog voltage

    • Voltage Range: 0 to VCC

    • Signal Behavior:

      • Continuous (proportional to reflectivity)

      • Requires ADC for microcontroller reading

    Supports:

    • Threshold-based detection

    • PID control (advanced robots)

    Electrical Characteristics

    • Operatupply Current: ~25 mA (variant dependent)

    Compatible with:

    • Arduino

    • ESP32

    • Raspberry Pi (ADC required)

    Interface

    • 3-pin connection:

      • VCC

      • GND

      • OUT (analog signal)

    No extra signal conditioning required

    Physical Characteristics

    • Very compact size: ~18.1 8.4 4.2 mm

    • Lightweight and easy to mount

    • Central mounting hole for precise positioning

    Functional Behavior

    • Continuously measures reflected IR intensity

    • Output changes smoothly based on:

      • Surface color

      • Distance

      • Material reflectivity

    Enables:

    • Line position detection

    • Edge detection

    • Surface variation sensing

    Key Technical Features

    • Short-range high accuracy (~3 mm)

    • Simple 3-pin interface

    • No external components required

    • Compact PCB design

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    Advantages

    • Beginner-friendly design

    • Analog output high precision control

    • Easy integration with microcontrollers

    • Small size for compact robots

    • Suitable for both basic and advanced projects

    Limitations

    • Very short sensing distance

    • Affected by:

      • Ambient light

      • Surface texture

    • Requires ADC (not direct digital input)

    • Needs calibration for accurate results

    Applications

    • Line follower robots

    • Edge detection (sumo robots)

    • Maze-solving robots

    • Object presence detection (short range)

    • Rotary encoder sensing

    • Surface contrast measurement

    Technical Summary

    The Cytron Maker Reflect sensor is a that:

    • Provides continuous reflectivity data

    • Enables precise surface detection

    • Is optimized for close-range robotics applications

    Best suited for:

    • Beginner robotics

    • Line tracking and edge detection

    • Projects requiring analog sensing precision</