Little Bird
Arduino Line Trace Sensor Module
The Line Trace Sensor Module uses an infrared emitter/detector pair to measure the reflectivity of a surface below it. When the reflectivity exceeds an adjus...
The Line Trace Sensor Module uses an infrared emitter/detector pair to measure the reflectivity of a surface below it. When the reflectivity exceeds an adjustable threshold, the output goes low — making it ideal for building line-following robots and edge-detection systems.
The onboard potentiometer lets you fine-tune the detection threshold to suit different surfaces and lighting conditions. Compatible with Arduino and other microcontrollers operating at 2.5–12V.
Key Features
- IR Reflectivity Sensing – Detects surface reflectivity changes for line tracking
- Adjustable Threshold – Onboard potentiometer for fine-tuning sensitivity
- Active Low Output – Output goes low when reflectivity exceeds threshold
- Wide Voltage Range – 2.5–12V power supply for broad compatibility
- Simple 3-Pin Interface – VCC, OUT, and GND for easy wiring
Specifications
- Output Signal – Active low (TTL level)
- Interface – 3-pin (VCC / OUT / GND)
- Power Supply – 2.5–12V
- Working Current – 18–20mA at 5V
Ideal For
- Line-following robots
- Edge detection and table-edge avoidance
- Surface reflectivity measurement
- Arduino and microcontroller beginner projects
Package Contents
- 1× Line trace sensor module
Jargon buster
Plain-language definitions for the technical terms used above.
- active LOW
- Active LOW means an input is considered switched on when it is connected to a low voltage or ground. This matters when wiring buttons, switches, or other trigger signals so the board responds in the expected way.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- potentiometer
- A variable resistor usually turned with a knob or shaft to create an adjustable electrical signal. It is often used for inputs such as volume, brightness or position, so it helps beginners learn how a microcontroller reads changing values.
Find this product in
Arduino
Sensors & Input
Related Tutorials
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