Electrical Engineering project topics and materials free Download in PDF & DOC for Nigeria

List of Electrical Engineering project topics and materials free Download in PDF & DOC for Nigeria. Our Final year Diploma, Degree, Masters, thesis Electrical Engineering research works materials starts from Abstract, Chapter 1-5, references and more. Get undergraduate projects for ND, HND, NCE, BSC, BED, MSC, MBE, PHD and PGD students. We offer Qualitative & Quantitative data analysis, using any package (SPSS, RStudio, eviews, Stata, JMP, OriginPro, GNU Octave, matlab, microsoft excel, Minitab). Hire a professional Electrical Engineering writer/researcher for projects, masters thesis, journals and assignments at low cost. Sell your Electrical Engineering project materials on projectslib.com

  • DESIGN AND CONSTRUCTION OF AN AUDIO AMPLIFIER

    CHAPTER ONE

    Introduction

    This project involved design and construction of an audio amplifier .The term audio refers to sound or human hearing as the range of human hearing extends from about 20 hertz to 20,000 hertz (i.e. 20k hertz) but varies considerably with age and individuals. That is we can hear air pressure change or vibration that vary in pitch from about 20 times per second to about 20,000 times per second.

    The term pitch describes the subjective sensation of hearing an air pressure vibration or sound meaning pitch of a double bass is low, that is flute or soprano is high. The more the air pressure vibrates pre second, the higher the pitch.

    Transistor which has the ability to amplify cannot amplify the air pressure (acoustic) directly; therefore it is necessary to first convert the air pressure vibration into equivalent electrical vibration by means of a sound transducer, a microphone or similar acoustic electrical transducer. Meaning that if one sings into a microphone, a pure tone that has a pitch say 1000 vibration per second will be gotten. The microphone output will be an electrical AC signal that has lets say about frequency of 15,000 hertz after passing through the amplifier circuit.

    Amplifier circuit is the interconnection of diodes, capacitors resistors, transformers, integrated circuits, transistors, heat Zink each of which has a required function. The circuit is capable of amplifying a very weak signal to a larger signal.

    For amplifier circuit to be able to drive more load (speakers), a good number of pair of transistors has to be used. Hence, the number of pair of transistor should not be too much to avoid humming.

    Aim and Objectives

    The main aim and objective of this project work is to design an audio amplifier system which can be used to amplify a very weak signal to produce a higher output so that it drives a number of loud speakers.

    Scope of Study and Limitation

    This project work is the design and construction of audio amplifier that could be able to drive a higher number of loads i.e. speakers with good impedance matching, with good volume.

    The limitation is that, it is just an audio amplifier without any application like

    • Audio amplifier with mixer
    • Equalizers using operational amplifier
    • Photo voltaic light sensors using operational amplifier
    • Medical electronic monitoring system using operational amplifier
    • Phase detector using operational amplifier
    • Electronic thermometer using operational amplifier and so on.

    Justification

    This project work is relevant to the needs of the department, school, churches, mosques, and the society at large. It is useful in a congregation where it is used to raise the voice of the speaker so that he/she could be heard louder and clearer by the congregation. It can also be used to raise the volume of music and sound, during programme like NASTES, which as a result reduce stress and cost. This project is worthwhile, and stands to benefit many.

    Compare
  • DESIGN AND CONSTRUCTION OF INTRUDER DETECTOR ALARM SYSTEM WITH DIRECTION/LOCATION DISPLAY

    ABSTRACT

    This research is on Design and construction of intruder detector alarm system with direction/location display. This project work deals with the use of Direction/Location Display which is capable of detecting intrusion at any location, sound and alarm and display the exact location of the intruder using seven segment displays. This project work is realized using top down methodology with active and passive components available in the local market. It is realized in different modules, all combined to form one function unit. The inputs are opto-couplers configured with laser diodes and light Dependent Resistor. (LDR) which act as the electronic eyes installed at the sensory points. The control unit is made up of one short delay circuit, audio frequency generator, priority encoder and decoder, piezo-buzzer and single digit seven segment display. The system is packaged in a well-furnished wooden material. This system does not record/display the intruder. In a case of simultaneous intrusion, the display shows the location with the highest priority. And the system is powered from a mains supply. The result being a system which can detect intrusion, sound an audible alarm and displays the exact location of the intruder. It has a wide a range of application in surveillance especially in industrial and home security.

    Compare
  • Compare
  • Compare
  • Compare
  • Compare
  • Compare
  • Compare
  • Compare
  • Compare
  • Compare
  • Compare

Main Menu