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 → higher output voltage
👉 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
- Operating Voltage: 3.0V – 5.5V
- Supply 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
- Infrared reflectance sensing
- Analog proportional output
- Short-range high accuracy (~3 mm)
- Simple 3-pin interface
- No external components required
- Compact PCB design
🔹 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 compact analog IR reflectance sensor 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
