Design Electro-Mechanical Line Tracking Robot

Fuzairin, Mat Noor (2006) Design Electro-Mechanical Line Tracking Robot. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The objective this Line Tracking Robot is used to follows a line that drawn on the floor. The robot will detect a black line on a white surface and track the line. To make sure robot can detect a black line, a sensor will be used like an IR (Infra-red) LED and phototransistor. IR light used for a variety purposes and one of its applications is as IR sensor that consists of an IR LED and phototransistor reflecting light from a surface. When the surface is white, the IR light from the LED reflects efficiently, turning the phototransistor. A black surface tends to adsorb IR light and very little is reflected, keeping the phototransistor turned off. This line following robot is expected to follow a black line on the surface. This robot also can detect line again if it out from the track with refers to IR LED and phototransistor function. This robot will used two motors for control rear wheels and a single front wheel is free. At the bottom of robot, IR sensors will be used for detect black tracking line. The IC used in this project is the LM393N. The function of this comparator is to compare a logic signal 0 or 1 from sensor whether robot will forward, turn left or tum right. The movement of robot is depends to signal which given by sensor namely 0 (low) and 1 (high).

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