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INTRODUCTION
This Project Grid solving Robot is based on 8 bit Microcontroller AT89S52.
This Robot follows the black line which is drawn over the white surface or it
follows the white line which is drawn over the black surface. The sensors
are used to sense the line. When the light signal falls on the white surface, it
gets reflected and if it falls on the black surface, it is not reflected, this
principle is used to scan the Lines for the Robot. All the above systems are
controlled by the Microcontroller. In our project we are using the popular 8
bit microcontroller AT89S52. It is a 40 pin microcontroller. The
Microcontroller AT89S52 is used to control the motors. It gets the signals
from the sensors and it drives the motors according to the sensor inputs.
Two stepper motors are used to drive the robot.
The basic principle used for grid following is detecting the intersection and
taking a turn accordingly. When a junction is detected we take a single
wheel turn, thus aligning the robot on to the right angled path. A small
amount of delay is included after each turn to prevent false input to be taken by robot while turning.