Browsing by Author "Najibullah"

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    A thesis submitted in partial fulfillment of the requirement for bachelor of science in electrical and electronics engineering
    (Department of Technical and Vocational Education (TVE), Islamic University of Technology (IUT), 2013-11-15) Naser, Mohammad; Najibullah; Abbas, Sikandar
    Micro controller plays an important role in industries as well as in our day-to-day life. They are programmable devices which are used to control working principles of technologies or functionalities of different application that has been designed based on each and every single instruction that has been given to the Micro controller using assembly language (MPLAB/simulation and Proteus in our project, to design control unit if Microwave oven using micro controller PIC16F872A), and provides desired functions and proper directions in industries. They are also an indispensable part of our daily lives. An average home in Australia, Asia, Europe, Africa and America using these technology. Microcontroller is considered as a basic device or equipment in software engineering and programming. The aim of this thesis is to introduce students to the modeling and designing instructions of control unit of micro wave oven using micro controller for different operation on different components, based on MPLAB and PROTEUS and to use computer simulation as a tool for conducting procedures and control studies. From reading theory the dynamic behavior and interactions that are often not readily apparent and feasible that is why simulation can be very helpful in gaining insights to the different behaviors. Next to having an actual system to experiment on, simulation is often chosen by engineers to study transient and control performance or to test conceptual designs. MPLAB is used because of the short learning instruction that most students require to start using it, its wide distribution, and its general-purpose nature. This will demonstrate the advantages of using MPLAB for analyzing micro controller instructions power system steady state behavior and its capabilities for simulating transients in power systems and power electronics, including control system dynamic behavior.
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    GSM based home automation
    (Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh, 2015-10-30) Karimou, Ahmadou; Farhad; Najibullah
    With the increase in consumption of energy and population, there is a grave need to conserve energy in every way possible. The inability to access and control the appliances from remote locations is one of the major reasons for energy loss. A web or an android application is used by the users to give instructions to these systems. This system can make use of a host of communication methods such as Wi-Fi, GSM, Bluetooth, ZigBee. Different controlling devices and configurations can be found in existing systems. Such systems have been found already in many places for a wide variety of applications. This paper presents a survey of all such systems.
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    Power Flow Analysis using MATLAB
    (Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh, 2012-10-15) Naser, Mohammad; Najibullah
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    Power Flow Analysis using MATLAB
    (Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh, 2012-11-15) Naser, Mohammad; Najibullah
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    Solar Battery Charger Circuit
    (IUT, TVE, 2016-11-20) Najibullah; Farhad; Srhan, Mahmoud
    Solar concept is not new for us. As non-renewable energy sources are decreasing, usage of solar energy is increased. This solar energy is not only used on the Earth but also used in space stations where no electrical power is available. Solar energy begins with the sun. Solar panels, also known as photovoltaic, are used to convert light from the sun, which is composed of particles of energy called "photons", into electricity that can be used to power electrical loads. Light from the sun is a renewable energy resource that provides clean energy, produced by solar panels. Many people are familiar with so-called photovoltaic cells, or solar panels, found on things like spacecraft, rooftops, and handheld calculators. The cells are made of semiconductor materials like those found in computer chips. When sunlight hits the cells, it knocks electrons loose from their atoms. As the electrons flow through the cell, they generate electricity. Here is the simple circuit to charge 12V, 1.3Ah rechargeable Lead-acid battery from the solar panel. This solar charger has current and voltage regulation and also has over voltage cut off facilities. This circuit may also be used to charge any battery at constant voltage because output voltage is adjustable