New Generation Publishing



                                                                                                   Easy, Hands On Electronics Books



                                                                               Second Edition




A Practical Handbook to

 DC Electronics





Copyright © 2006, 2009 – 2nd edition, by Alireza H. Fassih


All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, xerography, recording, or by incorporating into any information storage or retrieval system, without the written permission from the author. Making copies of any part of this book for any purpose is a violation of United States copyright laws.


The author or the publisher does not warrant the accuracy of the materials in this book. Neither the author nor the publisher is liable or responsible for any damages or injuries

as a result of using the materials in this book directly or indirectly.




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Printed in the United States of America



ISBN 0-9776054-4-2 / 978-0-9776054-4-6






The main purpose of this handbook is a HANDS-ON APPROACH in learning DC circuits.

In each section, a component is introduced and then a software/hardware circuit will follow. The software circuit can be implemented by electronic circuit design and simulation software such as Multisim ®.


The main goal of this handbook is to create a vast visualization of the working function of the DC electronics circuitries. Based on my experience in teaching electronics, students had more problems with setting up the hardware circuits than software circuits. Therefore, one of my main intentions in writing this handbook is to guide the students through setting up a complete wiring of the circuits.


This handbook is a COMPREHENSIVE COVERAGE of the practical working of the DC circuits and can be used as DC electronics textbook/lab manual in DC electronics course.








Chapter 0: Basics


  1. Powers of Ten


  1. Scientific Notation


  1. Engineering Notation


  1. Atoms



Chapter 1: DC Signal


1.1   DC Voltage and Current


1.2   DC Signal


1.3   Power Supply


1.4       Multi-meter


1.5       Volt-meter


1.6       Circuit board



Chapter 2: DC Resistive Circuits


2.1   Resistor


2.2   Ohm-meter


2.3   Variable Resistor


2.4   Color Code of Resistor


2.5   Ohm’s Law


2.6    Electric Power


2.7    Conventional Current Flow and the Ground


2.8    Ammeter



Chapter 3: Series and Parallel Circuits


3.1    Kirchhoff’s Voltage Law


3.2    Kirchhoff’s Current Law


3.3    Series and Parallel Batteries


3.4    Series Circuit


3.5    Parallel Circuit


3.6    Series-Parallel Circuit


3.7    Voltage Divider


3.8    Complex Circuit



Chapter 4: Circuit Theorems


4.1     T or Y Connection


4.2     Pi or Delta Connection


4.3     Pi to T Conversion Formulas


4.4    T to Pi Conversion Formulas


4.5    Bridge Circuit


4.6    Thevenin’s Theorem


4.7    Norton’s Theorem


4.8    Superposition Theorem



Chapter 5: Magnetism and Electromagnetic Induction   


5.1    Magnetic Field


5.2    Electromagnetic Field


5.3    Induced Voltage and Current