Arduino Line Follower Robot Car DIY Kit

Key Features

• Pre-programmed / ready programmed Arduino controller

• No coding required for initial operation

• Autonomous line-following functionality

• Dual IR line-tracking sensors

• Arduino-based robotics platform

• 2WD differential-drive system

• Two BO/DC geared motors

• Motor driver module included

• Rubber-grip robot wheels

• Acrylic robot chassis

• Adjustable IR sensor sensitivity

• Battery-powered operation

• Arduino IDE compatible

• Reprogrammable for advanced experiments

• Suitable for robotics competitions and STEM learning

• Reusable components for future robotics projects

Technical Features

Controller

Sensor System

Drive System

Mechanical & Power

Line Detection Principle

IR line-tracking sensors work by detecting differences in the amount of infrared light reflected by different surface colours.

A high-contrast track allows the sensors to distinguish the line from the surrounding surface.

The Arduino continuously reads the two sensors and adjusts the left and right motors to keep the robot aligned with the track.

For example, depending on the program and sensor arrangement:

Both Sensors Correct → Continue Forward

Left Sensor Detects Deviation → Correct Direction

Right Sensor Detects Deviation → Correct Direction

The exact motor response depends on the supplied RoboGears program and sensor configuration.

Compatibility

Compatible With

• Arduino-compatible controller ecosystem

• Arduino IDE

• IR line-tracking sensors

• BO/DC geared motors

• 2WD robot chassis systems

• Arduino-compatible motor drivers

• Educational robotics projects

• Autonomous navigation experiments

Programming Requirement

Coding is NOT required for initial operation.

The Arduino-compatible controller supplied with the RoboGears project kit is:

PRE-PROGRAMMED / READY PROGRAMMED

Students can first assemble and operate the robot using the supplied program.

The Arduino can later be reprogrammed through the Arduino IDE for:

• Different line-following algorithms

• Motor-speed adjustment

• Sensor calibration experiments

• Turning behaviour modification

• Track recovery logic

• Robotics competition tuning

Track Requirements

For best results, use a:

• Clean track

• High-contrast line and background

• Flat surface

• Consistent track width

• Well-lit but controlled environment

Sensor sensitivity should be adjusted according to the actual track and lighting conditions.

Before Purchase

This is a DIY Ready-to-Assemble Robot Kit, not a fully assembled robot.

The customer needs to:

Assemble → Wire → Position Sensors → Check Connections → Power → Calibrate → Test

The Arduino is supplied pre-programmed, so coding is not required for the initial setup.

Applications

• Line follower robot

• Autonomous robot project

• Arduino robotics learning

• STEM education

• School science projects

• College mini-projects

• Robotics competitions

• Robotics workshops

• IR sensor experiments

• Motor-control learning

• Embedded-system training

• Autonomous navigation demonstrations

• Engineering projects

• Arduino programming practice

Who Is This Kit For?

Suitable for:

• School students

• College students

• Arduino beginners

• Robotics learners

• Electronics hobbyists

• STEM laboratories

• Robotics clubs

• Robotics workshops

• Competition beginners

• Engineering students

📦 What's Included

❌ What's Not Included

The current RoboGears package list does not explicitly state that the following are included:

• Batteries

• Battery Charger

• Laptop / Computer

• USB Programming Cable

• Printed Line-Following Track

• Decorative Project Base

• Additional Sensors

• Tools required for assembly

Do not advertise these items as included unless they are physically supplied with the current kit.

Important Package Note

Actual component colour, PCB design, chassis appearance or equivalent component revision may vary depending on available stock while maintaining the intended functionality of the project.

📚 Resources

Arduino Program

RoboGears provides a Code Link for this line follower project on the product page.

The Arduino-compatible controller supplied with the kit is pre-programmed / ready programmed, so customers do not need to upload code for initial operation.

The program resource can later be used to:

• Study line-following logic

• Understand IR sensor inputs

• Learn motor-driver control

• Modify turning behaviour

• Experiment with motor speed

• Develop improved line-following algorithms

Getting Started

Step 1 — Identify the Components

Before assembly, identify:

• Arduino-compatible controller

• Acrylic chassis

• Two BO/DC geared motors

• Two wheels

• Castor wheel

• Two IR tracking sensors

• Motor driver

• Jumper wires

• Mounting hardware

Step 2 — Assemble the Chassis

Mount the two geared motors securely to the chassis.

Install one wheel on each motor shaft.

Install the castor wheel to provide stable support for the 2WD robot.

Step 3 — Mount the Arduino & Motor Driver

Secure the Arduino-compatible controller and motor driver to the chassis.

Avoid allowing exposed PCB contacts to touch conductive materials.

Step 4 — Position the IR Sensors

Mount the two IR line-tracking sensors toward the front/bottom of the robot.

The sensors should face the track surface.

Correct:

• Sensor height

• Sensor spacing

• Sensor alignment

are important for reliable line tracking.

Step 5 — Connect the Motors

Connect the left and right BO motors to the motor-driver outputs.

Step 6 — Connect the Motor Driver

Connect the motor-driver control inputs to the Arduino according to the RoboGears project wiring.

Do not randomly choose Arduino pins.

The wiring must correspond with the supplied pre-programmed code.

Step 7 — Connect the IR Sensors

Connect each sensor's:

• VCC

• GND

• Signal Output

according to the project wiring.

Step 8 — Check All Connections

Before applying power, verify:

• Power polarity

• Common ground

• Motor connections

• Sensor connections

• Motor-driver connections

• Loose jumper wires

• Wheel movement

• Sensor positioning

Step 9 — Prepare a Test Track

Use a clean, flat and high-contrast track.

Avoid complicated curves during the first test.

Start with:

Straight Line → Gentle Curve → Larger Track

Step 10 — Calibrate the Sensors

Adjust the IR sensor sensitivity so each sensor reliably distinguishes between the line and background.

Test each sensor individually before running the complete robot.

Step 11 — Test the Robot

Place the robot on the track and observe:

• Forward movement

• Left correction

• Right correction

• Sensor response

• Motor balance

Fine-tune the sensor position and sensitivity if required.

🔧 Engineering Notes from RoboGears

1. Sensor Calibration Is Critical

Adjust both IR sensors before evaluating the robot's performance.

Two sensors of the same type may not respond at exactly the same threshold.

2. Use a High-Contrast Track

For initial testing, use a clean and clearly contrasting line/background combination.

Poor contrast can make reliable line detection difficult.

3. Keep the Track Surface Clean

Dust, reflective tape, marks or inconsistent surface finishes can affect IR reflection and cause incorrect readings.

4. Sensor Height Matters

IR sensors mounted too high or too low may produce inconsistent detection.

Keep both sensors at approximately the same height from the track.

5. Sensor Alignment Matters

The two sensors should be mechanically stable and correctly positioned relative to the line.

A sensor that moves or changes angle while the robot travels can produce inconsistent navigation.

6. Check Motor Direction Before Track Testing

Lift the drive wheels safely off the surface and confirm that the motors respond in the expected direction.

Incorrect motor polarity can make a correctly programmed robot behave incorrectly.

7. Motor Speed Balance Matters

If one motor naturally rotates faster than the other, the robot may continuously drift.

Motor-speed calibration can improve line-following stability.

8. Start With an Easy Track

Do not begin testing with very sharp corners.

Start with:

Straight Sections → Wide Curves → Moderate Turns → Advanced Track

This makes calibration much easier.

9. Test the Pre-Programmed System First

Before changing the Arduino program, confirm that:

• Sensors work

• Motors work

• Motor driver works

• Wiring is correct

• Robot can detect the track

Only then begin modifying the program.

10. Secure the Wiring

Loose jumper wires can disconnect as the robot moves and may appear to be programming or sensor faults.

⚠️ Common Problems

Robot Does Not Follow the Line

Check:

• IR sensor sensitivity

• Sensor height

• Sensor orientation

• Track contrast

• Arduino wiring

Robot Continuously Turns Left or Right

Possible causes include:

• One sensor incorrectly calibrated

• One motor rotating faster

• Incorrect motor polarity

• Misaligned sensors

• Motor-driver wiring problem

Robot Moves Backward

Check motor polarity and left/right motor connections.

One Motor Does Not Run

Check:

• Motor connection

• Motor-driver output

• Jumper wires

• Motor itself

Temporarily swapping motor connections can help isolate whether the problem is the motor or driver channel.

Robot Loses the Line on Curves

Possible causes include:

• Curve too sharp

• Robot moving too fast

• Incorrect sensor spacing

• Poor sensor calibration

• Track contrast too low

Robot Works Under One Light but Not Another

IR-based sensors can be affected by ambient conditions.

Recheck sensor sensitivity under the lighting conditions where the robot will actually operate.

Engineering Tip

A line follower's performance is not determined by the Arduino alone.

Reliable tracking depends on the complete system:

Track Quality + Sensor Position + Sensor Calibration + Motor Balance + Mechanical Alignment + Control Logic

FAQ

1. What does this robot do?

The robot automatically detects and follows a predefined line or track using IR line-tracking sensors and Arduino-based motor-control logic.

2. Is the Arduino included?

Yes.

The current package includes 1 × Arduino-compatible controller board.

3. Is the Arduino pre-programmed?

Yes.

The Arduino-compatible controller supplied with the RoboGears kit is pre-programmed / ready programmed, so coding is not required for initial operation.

4. How many IR sensors are included?

The kit includes:

2 × IR Line Tracking Sensors

5. Which motors are included?

The kit includes:

2 × BO/DC Geared Motors

6. Is the motor driver included?

Yes.

The current package includes 1 × Motor Driver Module.

7. Is assembly required?

Yes.

This is a DIY Ready-to-Assemble Robot Kit. Mechanical assembly, wiring, sensor positioning and calibration are required.

8. Do I need coding knowledge?

No coding is required for initial operation because the supplied Arduino is pre-programmed.

Learning Arduino programming is useful if you want to modify the robot's behaviour later.

9. Can I change the Arduino program?

Yes.

The controller is Arduino IDE compatible and RoboGears provides project code as a resource.

10. What type of track should I use?

For initial testing, use a:

• Flat surface

• Clean track

• High-contrast line/background

• Consistent line width

• Track with gentle curves

Sensor sensitivity may need adjustment according to the track and lighting conditions.

11. Are batteries included?

The current RoboGears package list does not explicitly list batteries, so batteries should not be considered included unless confirmed separately with the supplied kit.

12. Can this robot be used for competitions?

The product is suitable for robotics learning and school/college competition projects.

For competitive use, additional tuning of sensor position, motor speed and Arduino control logic may be required.

13. Can I add more sensors?

The Arduino platform allows the project to be expanded or modified, subject to available I/O, power requirements and programming.

Additional sensors are not part of the standard package unless specifically stated.

14. Why does the robot sometimes leave the line?

Common reasons include:

• Incorrect sensor calibration

• Poor track contrast

• Sensor misalignment

• Unequal motor speed

• Excessive speed

• Very sharp turns

• Loose wiring

15. Is this a fully assembled robot?

No.

This is an educational DIY ready-to-assemble kit designed to provide hands-on experience with robotics, electronics, sensors and motor control.

Important Note

This product is intended for educational, DIY, STEM and prototyping applications.

Assembly, wiring, sensor calibration and testing are required. The Arduino-compatible controller supplied with the RoboGears kit is pre-programmed / ready programmed, so coding is not required for initial operation.

Actual line-following performance depends on track contrast, surface condition, ambient lighting, sensor calibration, motor balance and mechanical alignment.

Component colour, PCB revision or chassis appearance may vary between batches while maintaining the intended functionality.