INDEX

LINE FOLLOWER ROBOT
As the name implies,the aim of the line follower robot is to follow a predefined line. Mostly the line is made of black or white. There will be different curving's like 90 degree curving, some cutting in the line,sometimes the way may be inclined depending on competition. There are different ways of solving line follower robots. Here i am explaining it with analog circuit. I heard someone done it using Matlab, by inferring the equation of the line and moving the robot according to it. In that case first robot should remember the line, then next time it will follow the line fastly and perfectly. The main concern of the line follower robot is how fast it is. Here i will talk about white strip and black strip. Mostly the strip or line will be black and the background is white. So when I am talking about white strip take it as background and black as line. Some events have white strip also.

The basic line follower is one in which consist of two motors. For taking turn we stop one motor and run the other motor. This makes the robot to take a turn.You should keep the sensors with LED to sense dark and white. The sensor and LED should be covered properly to produce sharp sensing
Let's start with LDR which will be good for beginners. Use LED+LDR combination or IR LED+Photo diode(photo transistor) or 38Khz modulated IR+TSOP1738 to sense white and black strip.