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DESIGN AND DEVELOPMENT OF STREAK DEVOTEEROBOT USING THE PRINCIPLE OF REFLECTION OF LIGHT RAYS

Platform : EMBEDDED

DESIGN AND DEVELOPMENT OF STREAK DEVOTEEROBOT USING

THE PRINCIPLE OF REFLECTION OF LIGHT RAYS

ABSTRACT

 

     This obstacle sensing robot has the 2 sensors are placed at bottom of robot the principle of operation is absorption of light by black bodies when the robot moves away from black line one of the sensor gets light back and hence the microcontroller recognizes it and correspondingly adjusts the robot to follow the line by halting one of two DC motor coupled to wheels for a while until the robot is again placed on line

 

                         The ROBO consists of Ir receiver and microcontroller unit, which drive the wheels of the ROBO via pairs of DC motors. The receiver pairs placed at the bottom of the ROBO resemble that of a car headlight. The ROBO moves in line when any ir rays is received by any of two sensors the one of the motor is so adjusted such that the motor is again placed on the line hence again now there will no ir rays is reflected from the black line and the robo continues to move on the line straightly

 

                      Here the Ir transmitter is wired around a astable multivibrator so as it generates a pwm pulse of 39khz modulated with a 300hz wave so as a result of this modulated Ir is emitted this is done to avoid any interruption with other Ir sources such bas sun, or any halogen lamps etc the Ir receiver in the robot is also directional one the output of Ir receiver is fed to a microcontroller the microcontroller in turn drives a pair of dc motor which is coupled to wheel of robot the microcontroller is programmed to check for any valid ir receiver signal while signal is received from any of sensor the microcontroller adjusts the speed of the corresponding motor there by placing the robo on the black line therefore there will be no reflected signal now microcontroller drives both motor in same speed thus the  robo keeps tracks the line

 

 

 

 

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