TCRT5000 IR Sensor Module
TCRT5000 IR Sensor Module
Reflective Infrared Sensor Object Detection Line Tracking
The TCRT5000 IR Sensor Module is a reflective infrared sensor used to detect objects, surfaces, and line markings. It consists of an infrared LED transmitter and a phototransistor receiver in one package.
The sensor works by emitting infrared light and detecting the reflected light from nearby objects or surfaces. It is widely used in line-following robots, object detection systems, and position sensing applications.
Infographic Overview
Basic Specifications
Feature | Details |
Operating Voltage | 3.3V 5V |
Operating Current | ~20 mA |
Detection Distance | 2 >rfrared |
Output Type | Digital (D0) & Analog (A0) |
Sensitivity Adjustment | Yes (Potentiometer) |
Main Components
Component | Description |
IR Transmitter LED | Emits infrared light |
IR Phototransistor | Detects reflected IR light |
Comparator IC (LM393) | Converts analog signal to digital output |
Sensitivity Potentiometer | Adjusts detection sensitivity |
Indicator LEDs | Shows power and detection status |
Pin Configuration
Pin | Function | ||
VCC | Power supply (3.3V5Vr | D0 | Digital output |
A0 | Analog output |
Working Principle
The sensor works using infrared reflection detection.
Step-by-Step Operation
1 The IR LED emits infrared light toward a surface.2 If an object or surface is present, the light reflects back.3 The phototransistor receives the reflected light.4 Signal strength changes depending on the surface color and distance.5 The module outputs analog or digital signals.
Sensor Structure
TCRT5000 IR SensorIR LED Surface / Object5V'VCC GND A0 D0
Common Applications
Line follower robots Object detection systems Paper detection in printers Speed detection sensors Position and proximity sensing
Compatible Microcontrollers
The module can easily interface with:
Arduino Uno
Arduino Nano
ESP32
Raspberry Pi
Surface Detection Example
Surface Color | Reflection | Detection |
White Surface | High reflection | Strong signal |
Black Surface | Low reflection | Weak signal |
This property makes the sensor ideal for line-following robots.
Advantages
Compact and low-cost sensor Fast response time Adjustable sensitivity Both analog and digital outputs Perfect for robotics applications
Limitations
Short detection range Performance affected by ambient light Surface color influences readings
Example DIY Project
Line Following Robot
Components
TCRT5000 IR Sensor Module
Arduino Uno
Motor driver module
Robot chassis
Working
Sensor detects black line on white surface