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Light Follower Robot

₹ 2150

Light follower robot is a robot which uses optical sensors to move forward and follow a light source.

The optical sensor is a photo diode that is mounted on the front end of the robot acts as an eye for the robot to pick up light emitted from the light source. The photo diode produces a HIGH output when light is incident on it. The HIGH output of the photo diode is fed to the enabling input of the L 293D motor driver which then produces DC output voltage to drive the two DC motors. The motor driver will be producing sufficient DC voltage to rotate both the motors and make the robot move forward in the direction of the light source. The robot keeps on moving forward as long as the light source is ON. When the light source is turned OFF, the output from the photo diode goes LOW and the motor driver does not get the enabling input to supply DC voltages to the two motors. Thus there will be no motor rotation and the robot stops moving.

Line Follower Robot

₹ 2150

Line Follower Robot is a robot which moves along a black strip that is pasted on a white background.

It uses an infra-red (IR) sensor and photo diode to reflect & detect IR light. IR light gets reflected by white surfaces and absorbed by black surfaces. When the robot starts moving, both the IR sensors will be located on the white surface and both of them will produce a HIGH output. These HIGH outputs will cause rotation of both the motors and the robot moves forward. During forward movement if any sensor comes on to the black strip, the robot senses the black strip and automatically brought back the sensors onto the white background. In this way the robot is never allowed to stay away from the black strip.

Obstacle Avoider Robot

₹ 2200

Obstacle Avoiding Robot is a robot which cleverly avoid any obstacles that come in its path and changes its direction of movement.

This robot mainly uses two optical sensors to identify the obstacles. Each sensor module consists of an IR emitter and a photo diode. The left side IR sensor module controls the left side wheel while the right side sensor module will control the right side wheel. When no obstacles in front of both IR sensors, robot moves in forward direction. Now when the left side sensor module comes across any obstacle, IR light is reflected back by the obstacle and collected by the photo diode, hence commands the left side motor and wheel to rotate in the backward direction. Since the right side sensor has not come across any obstacle, it keeps on rotating in the forward direction and thereby causes the robot to rotate to the left. As soon as the robot rotates left, the sensor will no longer see the obstacle. Thus the left side wheel will start rotating in the forward direction along with the right side wheel and the robot again starts moving forward and straight. In this way the robot has successfully avoided the obstacle. In an identical process, the robot will turn to its right whenever the right side sensor comes across an obstacle and will successfully avoid the obstacle by turning to the right and then moving straight.

Belt Driven Robot

₹ 2850

Belt Driven Robot is a simple wired control robot with four wheels. The robot is however driven by only two DC motors that are located at the rear end of the chassis.

The two dummy wheels that are fixed at the front end on either side of the chassis will support the hard-rubber belt. Two hard-rubber belts are wrapped on the front and rear wheels that are fixed on either sides of the chassis. The rubber belts rotate when the DC motors are activated and facilitate forward and reverse movement of the robot. A switch module having two dual-pole dual-throw switches is used to move the robot both in the forward and reverse direction. The switches can also be used to turn the robot to the left or to the right. The function of these switches is to facilitate the required type of movement of the robot. By appropriately controlling the two switches the robot can be made to execute the required type of movements such as forward, backward, right turn and left turn.

Edge Detection Robot

₹ 2175

Edge Detector Robot is a robot that uses optical sensors to move-on top (white) of the table and is able to detect edges and prevents itself to fall of the table.

This robot moves only on top of a white surface table without dropping down. It uses an infra-red (IR) sensor that can detect the reflected IR light. IR light gets reflected by white surfaces and absorbed by other surfaces. When the robot is placed on the table top , it starts moving, the IR sensor will therefore be facing the white surface and will be moving forward. As soon as the IR sensor crosses the edge of the table, the IR light is not reflected back due to the absence of the white surface. The IR sensor will stop one motor and keep the other motor in rotation so that the robot will now take a turn, right turn and bring the IR sensor back on to the white surface thereby avoiding dropping down from the table. Since, the IR sensor will be brought back onto the white background and robot will move forward again. In this way the robot moves only on top of the table (white surface) and hence does not drop down from the table.