This project is a Line Follower Robot (LFR) built for competitive robotics events. The main goal was to design a fast, low-cost, and compact robot with smooth and accurate line tracking.

The robot uses a front-following algorithm with a PID control system. The PID values are fully adjustable in code, allowing easy tuning for different tracks and speeds. The same code can also be modified to work as left-following or right-following, making the robot highly flexible for competitions.

An Arduino Nano V3.0 is used as the main controller. Line detection is done using the RLS08 sensor array, which provides accurate position feedback. Motors are driven using the TB6612FNG motor driver, ensuring efficient and smooth motor control. Power is supplied by a 3.7V 850mAh 25C Li-Po battery, regulated using a MINI MP1584 DC-DC adjustable buck converter for stable voltage.

A custom PCB was designed to keep the robot compact and reliable. All components are neatly integrated, reducing wiring issues and improving performance.

In competition, this robot reached the finals, and after the event, it was further optimized. The robot’s speed is dynamically controlled by the PID output, resulting in smooth and precise turns even at higher speeds.

Special features:

• Low cost
• Compact design
• Fast performance
• Smooth and accurate turns
• Fully customizable code and algorithm
• Just solder the male headers on the PCB and put the modules (No need of SMD)
• At the start, the bot is calibrated manually

Images and videos are included to demonstrate the robot’s design, PCB, and real-time performance on the track.