INTRODUCTION
What is the line follower?
Line follower machine that can follow a path. The path can be seen as a black line on the white surface (or vice versa), or it might not be visible, as in a magnetic field.
Why create a line follower?
Feeling line and maneuvering the robot to stay on course, constantly correcting the wrong moves, using a feedback mechanism, generates a simple but effective closed-loop system. As a programmer, you can "teach" the robot how to follow the line, thus giving her personal property to respond to stimuli. The practical application of the Investigator: automated vehicles running on the roads with built-in magnets; Guidance system for industrial robots, moving peers, etc.
Requirements:
Knowledge of basic digital and analog electronics. (Course in Digital Design and electronic devices and circuits would be useful) C programming Sheer interest, innovation brains and persistence!
Background:
I started with the construction of the parallel port on the basis of a robot that can be controlled manually from the keyboard. On the side of the robot, the location of the relay is connected to the parallel port pins through the particles. the next version was the truth computer controlled line follower. He had the sensors connected to the conclusions about the State of the parallel port the program running on a computer parallel port status register interviewed hundreds of times per second, and sent control signals, respectively, through the data pins. Disadvantages of using a personal computer were soon became clear-it's difficult to control the speed of the engines, as the strength of the signal cable length increases decreases and increases latency.Long multicore cable for parallel data transfer expensive robot is not a portable, if you are using a desktop computer. Obviously, the next step is to create the control circuit board; options-wired logic or UC. Since I did not know ABOUT at the time, I implemented the wired logic using multiplexers. It basically shows the input from four sensors to four outputs for the motor drive in accordance with the table of truth. Although it worked fine, it cannot show there is no mind-like come back on line after losing it, or do something special when they say line ended. To work around this problem, and add some cool features using the microcontroller was the best option.
Reference:
http://studentbank.in/report-line-follow...z3J7vFHnvG
