Grove Line Finder v1.1 IR Reflective Sensor

Features & Compatibility

Important ESP32 voltage connection

• Seeed specifies a 5 V supply for Grove Line Finder v1.1. Use a suitable level shifter between its SIG output and a 3.3 V ESP32 GPIO.
• Expected v1.1 threshold polarity: HIGH for black/weak reflection, LOW for white/stronger reflection. Surface finish, spacing and ambient light affect the result.
• The signal is digital reflectance classification, not a calibrated distance reading. Use the linked stationary black/white test before motor control.

Features

🌱Integrated function: An IR indicator LED and an IR-sensitive phototransistor

🌱Digital output: A digital signal will change from HIGH to LOW. High when black is detected, Low when white is detected

🌱Easy to use: Compatible with Grove port, just plug-and-play

🌱Flexible detection: The detecting range is adjustable

 

Description

Grove-Line finder is designed for a line-following robot. It has an IR emitting LED and an IR-sensitive phototransistor. It can output a digital signal to a microcontroller so that the robot can follow a black line on a white background or vice versa.

Those eye-like sensors on the board are actually IR emitting LED and sensitive phototransistors. When the phototransistor detects the reflected infrared light from the IR emitting LED, it will output a digital signal, which changes from HIGH to LOW.

We have developed more than 400 Grove modules, covering a wide range of applications that can fulfill various needs. Click to explore the Grove Sensor family and get started to Grove your Idea. For all Grove users (especially beginners), we provide you with guidance PDF documents. Please download and read through Preface – Getting Started and Introduction to Grove before your use of the product.

 

Part List

Grove – Line Finder v1.1