KY-033 IR Sensor Module

The KY-033 IR Sensor Module, also known as the Infrared Line Tracking Sensor Module, is an efficient and reliable component designed to detect black and white contrast or infrared reflective surfaces. It is commonly used in line-following robots, automation systems, and object detection applications.

This module features an infrared emitting diode paired with a photodiode receiver, which senses the reflection of infrared light from the surface below. When placed over a white surface, the light is reflected back to the sensor, while a black surface absorbs it — allowing the module to distinguish between the two.

Built with a high-quality LM393 comparator, the KY-033 provides stable digital output and adjustable sensitivity through its onboard potentiometer. The module also features power and signal indicator LEDs for easy visual feedback during setup and operation.

With an operating voltage of 3.3V to 5V, it is fully compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers. Its compact design, quick response, and high precision make it perfect for robotics and electronic control applications.

⚙️ Technical Specifications:

• Model: KY-033

• Operating Voltage: 3.3V – 5V DC

• Output Type: Digital

• Sensor Type: Infrared Emitter and Receiver Pair

• Comparator Chip: LM393

• Detection Range: 2mm – 30mm (adjustable)

• Sensitivity Adjustment: Yes (via onboard potentiometer)

• Signal Indicators: Power LED and Signal LED

• Interface: 3-pin (VCC, GND, DO)

• Module Dimensions: 32mm x 14mm

• Compatible Boards: Arduino, Raspberry Pi, ESP8266, ESP32, STM32

💡 Key Features:

• 🚗 Line Following: Perfect for robotic car line tracking projects.

• ⚙️ Adjustable Sensitivity: Fine-tune detection range using onboard potentiometer.

• 💡 Dual LED Indicators: Power and signal status lights for easy debugging.

• ⚡ Fast Response Time: Quick detection for real-time robotic control.

• 🔌 Easy Integration: Compatible with most microcontroller development boards.

• 🔧 Stable and Reliable: Uses LM393 comparator for consistent output signals.

• 🧠 Educational Tool: Ideal for learning IR sensing and robotics.

🎯 Applications:

• Line-following robots

• Obstacle detection systems

• Black and white surface detection

• Industrial automation projects

• DIY robotics kits

• Educational electronics projects

🔗 Internal Links:

• Sensors & Modules

• Arduino & Accessories

• Robotics Components

• Electronic Components

• Tools & Accessories

🎥 YouTube Tutorial

Watch:http://KY-033 IR Sensor Module

🧩 Product Summary:

The KY-033 IR Tracking Sensor Module is a compact, high-precision infrared sensor designed for robotic line following and surface detection. With an adjustable detection range and stable LM393 comparator output, it ensures reliable performance in automation and educational applications. Its ease of use, compatibility with Arduino and Raspberry Pi, and real-time responsiveness make it an essential component for any robotics enthusiast or developer.