TCRT5000 IR Sensor (Pack of 5)

🔴 TCRT5000 IR Sensor
Reflective Infrared • Line Detection • Object Sensing
📌 What is TCRT5000?
The TCRT5000 is a reflective infrared (IR) sensor that combines:
IR LED (transmitter)
Phototransistor (receiver)
👉 It detects objects based on reflected infrared light.
✔ Commonly used in:
Line follower robots
Object detection systems
📦 Pack of 5
Contains 5 individual TCRT5000 sensors/modules
Useful for:
Sensor arrays
Robotics projects (multi-line tracking)
⚙️ Working Principle
IR LED emits infrared light
Light hits a surface
Reflected light is received by phototransistor
Output changes based on reflection
👉 Behavior:
White surface → high reflection → sensor ON
Black surface → low reflection → sensor OFF
🔌 Pin Configuration (Module Version)
Typical pins:
VCC → 3.3V / 5V
GND → Ground
DO → Digital Output
(Optional) AO → Analog Output
🔄 Output Behavior
Surface Type
Reflection
Output
White
High
LOW/HIGH (depends on module)
Black
Low
Opposite signal
✔ Acts like a switch based on surface color
📊 Technical Specifications
Operating Voltage: 3.3V – 5V
Detection Distance: ~1 mm to 15 mm
Optimal Distance: ~2.5 mm
Emitter Wavelength: ~950 nm (infrared)
Output Type: Phototransistor / digital comparator
Response: Fast (real-time detection)
✨ Key Features
Reflective IR sensing
High sensitivity to black/white surfaces
Adjustable sensitivity (via potentiometer on module)
Compact and low-cost
Works in moderate ambient light (has daylight filter)
🧠 How It Detects Color
White → reflects IR → detected → strong signal
Black → absorbs IR → weak/no signal
✔ That’s why it is widely used for line tracking robots
🛠️ Applications
Line follower robots
Obstacle detection (short range)
Object counting systems
Shaft encoder / speed detection
Surface detection (black/white patterns)
⚡ Advantages
Simple and inexpensive
Fast response
Easy to interface with Arduino
Good for short-range detection
⚠️ Limitations
Very short detection range
Sensitive to ambient light and surface type
Needs proper alignment with surface
Cannot measure long distances
💡 Important Notes
Best performance at 2–5 mm distance
Adjust sensitivity using onboard potentiometer
Avoid strong sunlight for accurate readings
Use multiple sensors for better tracking (array setup)
🧾 Summary
The TCRT5000 IR Sensor (Pack of 5) is a reflective optical sensor set used for:
✔ Line tracking
✔ Surface detection
✔ Short-range object sensing
👉 It is one of the most popular sensors in robotics, especially for beginner and intermediate Arduino projects.