The KY-033 Line Tracking Sensor Module is a compact and reliable IR sensor designed for intelligent path-following applications, ideal for Arduino and microcontroller projects. It detects contrasts between black and white surfaces and is commonly used in DIY smart car kits, line-following robots, and exploration vehicles.
This sensor uses an infrared transmitter and receiver to detect reflected light. A white surface reflects more IR light, while a dark surface absorbs it. The sensor outputs a digital signal (LOW when an object or black line is detected, HIGH when not detected) which can be read directly by a microcontroller.
Detection Distance: Up to ~2cm (optimal on white surfaces)
Operating Voltage: 2.5V – 12V (5V recommended)
Working Current: 18–20mA at 5V (customizable for low-power use)
Output Type: Digital (TTL level) – directly compatible with 3.3V or 5V IO pins
Output Signal:
LOW when object or black line is detected
HIGH when no object is detected
Interface: 3-pin (VCC / GND / OUT)
Form Factor: May vary slightly due to ongoing upgrades in design and color
100% Original product that covered warranty by the vendor.
You have the right to return your orders within 72 hours.
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