What is a Line Follower ?
A line follower is an autonomous robot that can follow
a line on the arena. The line is usually black or white in
color with a contrasting background.
The most basic arena consist of a closed loop
containing curves as shown below.
The more advanced arena will consist of junctions ,
diversions, splits in track and inversion of the color of
How to tackle the problem
The robot will have to sense the line and change its
trajectory using the information received. The most
simplest method is to have two sensors and a
When the right sensor has detected a line the right
motor stops, thus effectively producing a turning
motion , which continues till both the sensors are
again in the white region. This way the robot follows
The various parts of the system are
The body of the robot should be sturdy and easily
workable . The different options include plywood, GI
sheet and PVC foam sheet. Out of these the PVC foam
sheet is the most effective in terms of workability and
strength and is available in small quantities at a
The design of the robot will mainly depend on the size
constraint and the specific requirements of the event.
While designing keep in mind any future expansions
and provide space for every component like the
PVC foam sheet can be easily drilled and connected
using nut and bolts.
The different motors that are commonly used for