Grove – IR Line Follower Sensor V3.0

The Grove IR Line Follower Sensor v3.0 is a digital infrared sensor designed for detecting lines and edges. It uses a pair of IR LEDs and phototransistors to detect the difference between light and dark surfaces, making it ideal for applications like line-following robots or edge detection tasks.

It outputs a simple digital signal (LOW when a black line is detected, HIGH when white), and supports 3.3V and 5V systems. The sensor connects via the Grove interface and is designed for easy integration with development boards and platforms.

The effective detection range is approximately 0–5 cm, and the module can be mounted easily. An adjustment potentiometer and indicator LED are also featured on the board.

The module comes with a Grove cable, ready to plug into your Grove-compatible microcontroller.

Features

• Fast response time
• High analytic
• Cut-off visible wavelength λp=940nm
• Adjustment potentiometer and indicator LED
• Dual detection

Hardware Overview

Resources

• No tutorial available at the time of listing
  • Which is rare for Seeed, so keep an eye on their product page as they may add one
  • You’re tracking a simple digital HIGH or LOW however, so there’s not a lot more to it than that
• Schematic
• ITR9909 Opto Interrupter Datasheet
• Product number: Seeed 101021132

Package Contents

• 1x Grove – IR Line Follower Sensor V3.0
• 1x Grove cable