The TCRT5000 Sensor Module is an infrared reflective optical sensor designed for object detection, line tracking, and proximity sensing. It integrates an IR LED and phototransistor in a single package to detect reflected infrared light from nearby surfaces. This module is widely used in line follower robots, obstacle detection systems, and speed or position sensing applications.
Core Sensor Specifications
• Sensor Type: Infrared reflective optical sensor
• Sensor Model: TCRT5000
• Detection Method: IR reflection
• Output Type: Digital (some variants also provide analog output)
Electrical & Interface
• Operating Voltage: 3.3 V – 5 V
• Logic Level: TTL compatible
• Interface Pins: VCC, GND, DO (AO optional, module dependent)
• Onboard Components: IR LED, phototransistor, comparator (LM393)
• Sensitivity Adjustment: Onboard potentiometer
Performance Characteristics
• Detection Distance: ~1 mm to 15 mm (surface dependent)
• Fast response suitable for real-time sensing
• Works best on light/dark surface contrast
• Stable digital output with adjustable threshold
Physical Characteristics
• Module Type: PCB-mounted IR sensor module
• Sensor Package: TCRT5000 reflective sensor
• Compact and lightweight design
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• STM32, AVR, PIC microcontrollers
• Raspberry Pi GPIO
Key Advantages
• Simple and reliable line detection
• Adjustable sensitivity for different surfaces
• Low cost and easy to use
• Widely used in robotics applications
Technical Insights
• Detects reflected IR light, not distance directly
• Performance affected by surface color and ambient light
• Comparator converts analog signal to digital output
• Can be used with interrupts for fast detection
Applications
• Line follower robots
• Edge and path detection
• Object counting systems
• Speed and RPM measurement (encoder use)
• DIY robotics and automation projects
Pro Tip
• Adjust potentiometer based on surface reflectivity
• Maintain consistent sensor height from surface
• Shield sensor from direct sunlight for best results
Package Includes
• 1 × TCRT5000 Sensor Module