SparkFun Line Follower Array

Module with 1 QTRX type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4341

Module with 7 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4447

Module with 7 QTRX type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4347

Module with 13 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4413

Module with 13 QTRX type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4313

Module with 13 QTRX type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4353

Module with 25 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 50 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4425

Module with five ITR20001/T reflective sensors. Powered with the voltage from 3.3 V to 5 V, it has analog outputs. It can detect objects at a distance of up to 5 mm. Waveshare Tracker Sensor

Diffuse sensor with digital output. The threshold can be adjusted with the built-in potentiometer

A module with line sensors designed to work with the Kitronik kit. It has two sensors in the form of phototransistors that generate an analog voltage that can be read by the microcontroller. The module is equipped with a 4-pin connector (3V, 0V, L, R), which allows for power supply and reception of signals from the sensors, and the output voltage changes depending on the detected surface, which allows it to be used not only with the Kitronik kit, but also with platforms such as Arduino or Raspberry Pi Pico. Kitronik 56111

A compact line-tracing board designed for Raspberry Pi Pico, BBC micro:bit, and Arduino projects. Equipped with three phototransistors, it generates an analog output voltage proportional to the substrate\'s color, enabling precise control of autonomous vehicles. The board is solderless and ready to use, with a standard 2.54mm connector for easy integration with prototype breadboards. Kitronik 5337

This micro:bit module allows for light and object detection and line tracking, making it ideal for educational and robotic projects. Equipped with three phototransistors, it provides precise measurements, and the analog signal transmitted to the micro:bit allows for precise analysis of the surroundings. The board can be connected directly to the micro:bit or via alligator clips. Kitronik 5678

The :MOVE mini MK2 robot kit allows for automatic line tracking, enhancing the interactivity of educational projects. The kit is easy to assemble, requires no soldering, and adjustable sensors allow for precise sensitivity adjustments for the left and right sides of the robot. The module can track both a dark line on a light background and a light line on a dark background, and backward compatibility with the original :MOVE mini makes it easy to use in older projects. Kitronik 5659

The QTRXL-MD-01A-S reflective sensor with an analog output enables precise detection of lines and objects. Thanks to its extended range and high sensitivity, it is used in robotic and automation projects. The JST SH connector allows easy integration, and the wide supply voltage range enables flexible use in 3.3 V and 5 V systems.

A reflective sensor that precisely measures the intensity of light reflected from a surface using an IR LED and a phototransistor. It offers a long detection range—optimally around 20 mm, and up to 80 mm—thanks to the QTRXL sensor with a built-in lens and adjustable LED brightness. It generates a digital RC signal that\'s easily read by microcontrollers like Arduino or Raspberry Pi. Pololu 4540

A precision reflective sensor utilizing an IR diode and a phototransistor to measure light reflected from a surface. It offers an analog voltage output proportional to the reflected light and an optimal measurement range of 10 mm. Its low power consumption and compact size make it ideal for line-follower robots, edge detection systems, and educational projects. Pololu 4440