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How to contribute to this book

As a copylefted work, this book is open to revision and expansion by any interested parties. The only "catch" is that credit must be given where credit is due. This is a copyrighted work: it is not in the public domain!

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WARRANTY") below.                                               


If you wish to modify this book in any way, you must document the nature of those modifications in the "Credits" section along with your name, and ideally, information concerning how you may be contacted. Again, the Design Science License:


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Given the complexities and security issues surrounding the maintenance of files comprising this book, it is recommended that you submit any revisions or expansions to the original author (Tony R. Kuphaldt). You are, of course, welcome to modify this book directly by editing your own personal copy, but we would all stand to benefit from your contributions if your ideas were incorporated into the online "master copy" where all the world can see it.


All entries arranged in alphabetical order of surname. Major contributions are listed by individual name with some detail on the nature of the contribution(s), date, contact info, etc. Minor contributions (typo corrections, etc.) are listed by name only for reasons of brevity. Please understand that when I classify a contribution as "minor," it is in no way inferior to the effort or value of a "major" contribution, just smaller in the sense of less text changed. Any and all contributions are gratefully accepted. I am indebted to all those who have given freely of their own knowledge, time, and resources to make this a better book!

John Anhalt
  • Date(s) of contribution(s): December 2008
  • Nature of contribution: Updated lead-acid cell chemistry, Ch 11
  • Contact at: jpanhalt, forum.allaboutcircuits.com
Benjamin Crowell, Ph.D.
  • Date(s) of contribution(s): January 2001
  • Nature of contribution: Suggestions on improving technical accuracy of electric field and charge explanations in the first two chapters.
  • Contact at: [email protected]
Dennis Crunkilton
  • Date(s) of contribution(s): January 2006 to present
  • Nature of contribution: Mini table of contents, all chapters except appedicies; html, latex, ps, pdf; See Devel/tutorial.html; 01/2006.
  • DC network analysis ch, Mesh current section, Mesh current by inspection, new material.i DC network analysis ch, Node voltage method, new section.
  • Ch3, Added AFCI paragraphs after GFCI, 10/09/2007.
  • Contact at: liecibiblio(at)gmail.com
Tony R. Kuphaldt
  • Date(s) of contribution(s): 1996 to present
  • Nature of contribution: Original author.
  • Contact at: [email protected]
Ron LaPlante
  • Date(s) of contribution(s): October 1998
  • Nature of contribution: Helped create the "table" concept for use in analysis of series and parallel circuits.
Davy Van Nieuwenborgh
  • Date(s) of contribution(s): October 2006
  • Nature of contribution: DC network analysis ch, Mesh current section, supplied solution to mesh problem, pointed out error in text.
  • Contact at: Theoretical Computer Science laboratory, Department of Computer Science, Vrije Universiteit Brussel.
Ray A. Rayburn
  • Date(s) of contribution(s): September 2009
  • Nature of contribution: Nonapplicability of Maximum Power Transfer Theorem to Hi-Fi audio amplifier.
  • Contact at: http://forum.allaboutcircuits.com/member.php?u="54720"
Jason Starck
  • Date(s) of contribution(s): June 2000
  • Nature of contribution: HTML formatting, some error corrections.
  • Contact at: [email protected]
Warren Young
  • Date(s) of contribution(s): August 2002
  • Nature of contribution: Provided capacitor photographs for chapter 13.
[email protected]
  • Date(s) of contribution(s): November 2009
  • Nature of contribution: Chapter 8, troublehooting tip end of Kelvin section.
Your name here
  • Date(s) of contribution(s): Month and year of contribution
  • Nature of contribution: Insert text here, describing how you contributed to the book.
  • Contact at: [email protected]
Typo corrections and other "minor" contributions
  • The students of Bellingham Technical College's Instrumentation program.
  • anonymous (July 2007) Ch 1, remove :registers. Ch 5, s/figures something/figures is something/. Ch 6 s/The current/The current. (September 2007) Ch 5, 8, 9, 10, 11, 12, 13, 15. Numerous typos, clarifications.
  • Tony Armstrong (January 2003) Suggested diagram correction in "Series and Parallel Combination Circuits" chapter.
  • James Boorn (January 2001) Clarification on SPICE simulation.
  • Dejan Budimir (January 2003) Clarification of Mesh Current method explanation.
  • Sridhar Chitta, Assoc. Professor, Dept. of Instrumentation and Control Engg., Vignan Institute of Technology and Science, Deshmukhi Village, Pochampally Mandal, Nalgonda Distt, Andhra Pradesh, India (December 2005) Chapter 13: CAPACITORS, Clarification: s/note the direction of current/note the direction of electron current/, 2-places
  • Colin Creitz (May 2007) Chapters: several, s/it's/its.
  • Larry Cramblett (September 2004) Typographical error correction in "Nonlinear conduction" section.
  • Brad Drum (May 2006) Error correction in "Superconductivity" section, Chapter 12: PHYSICS OF CONDUCTORS AND INSULATORS. Degrees are not used as a modifier with kelvin(s), 3 changes.
  • Jeff DeFreitas (March 2006)Improve appearance: replace “/" and ”/" Chapters: A1, A2. Type errors Chapter 3: /am injurious spark/an injurious spark/, /in the even/inthe event/
  • Sean Donner (December 2004) Typographical error correction in "Voltage and current" section, Chapter 1: BASIC CONCEPTS OF ELECTRICITY,(by a the/ by the) (current of current/ of current).

    (January 2005), Typographical error correction in "Fuses" section, Chapter 12: THE PHYSICS OF CONDUCTORS AND INSULATORS (Neither fuses nor circuit breakers were not designed to open / Neither fuses nor circuit breakers were designed to open).

    (January 2005), Typographical error correction in "Factors Affecting Capacitance" section, Chapter 13: CAPACITORS, (greater plate area gives greater capacitance; less plate area gives less capacitance / greater plate area gives greater capacitance; less plate area gives less capacitance); "Factors Affecting Capacitance" section, (thin layer if insulation/thin layer of insulation).

    (January 2005), Typographical error correction in "Practical Considerations" section, Chapter 15: INDUCTORS, (there is not such thing / there is no such thing).

    (January 2005), Typographical error correction in "Voltage and current calculations" section, Chapter 16: RC AND L/R TIME CONSTANTS (voltage in current / voltage and current).

  • Manuel Duarte (August 2006): Ch: DC Metering Circuits ammeter images: 00163.eps, 00164.eps; Ch: RC and L/R Time Constants, simplified ln() equation images 10263.eps, 10264.eps, 10266.eps, 10276.eps.
  • Aaron Forster (February 2003) Typographical error correction in "Physics of Conductors and Insulators" chapter.
  • Bill Heath (September-December 2002) Correction on illustration of atomic structure, and corrections of several typographical errors.
  • Stefan Kluehspies (June 2003): Corrected spelling error in Andrew Tannenbaum's name.
  • David M. St. Pierre (November 2007): Corrected spelling error in Andrew Tanenbaum's name (from the title page of his book).
  • Geoffrey Lessel,Thompsons Station, TN (June 2005): Corrected typo error in Ch 1 "If this charge (static electricity) is stationary, and you won't realize–remove If; Ch 2 "Ohm's Law also make intuitive sense if you apply if to the water-and-pipe analogy." s/if/it; Chapter 2 "Ohm's Law is not very useful for analyzing the behavior of components like these where resistance is varies with voltage and current." remove "is"; Ch 3 "which halts fibrillation and and gives the heart a chance to recover." double "and"; Ch 3 "To be safest, you should follow this procedure is checking, using, and then checking your meter.... s/is/of.
  • LouTheBlueGuru, allaboutcircuits.com, July 2005 Typographical errors, in Ch 6 "the current through R1 is half:" s/half/twice; "current through R1 is still exactly twice that of R2" s/R3/R2
  • Norm Meyrowitz , nkm, allaboutcircuits.com, July 2005 Typographical errors, in Ch 2.3 "where we don't know both voltage and resistance:" s/resistance/current
  • Don Stalkowski (June 2002) Technical help with PostScript-to-PDF file format conversion.
  • Joseph Teichman (June 2002) Suggestion and technical help regarding use of PNG images instead of JPEG.
  • Derek Terveer (June 2006) Typographical errors, several in Ch 1,2,3.
  • Geoffrey Lessel (June 2005) Typographical error, s/It discovered/It was discovered/ in Ch 1.
  • [email protected] (July 2007) Ch 2, units of mass, pound vs kilogram, near "units of pound" s/pound/kilogram/.
  • [email protected] (April 2007) Telephone ring voltage error, Ch 3.
  • [email protected] (June 2005) Typographical error correction in Volumes 1,2,3,5, various chapters ,(:s/visa-versa/vice versa/).
  • [email protected] (April 2007) Telephone ring voltage error, Ch 3.
  • [email protected] (July 2007) Ch 4 near “different metric prefix”, s/right to left/left to right/.
  • [email protected] (September 2007) Ch 13 near s/if were we to/if we were to/, s/a capacitors/a capacitor.
  • [email protected] (October 2007) Ch 3, suggested, GFCI terminology, non-US usage.
  • Stacy Mckenna Seip (November 2007) Ch 3 s/on hand/one hand, Ch 4 s/weight/weigh, Ch 8 s/weight/weigh, s/left their/left there, Ch 9 s/cannot spare/cannot afford/, Ch1 Clarification, static electricity.
  • Cory Benjamin (November 2007) Ch 3 s/on hand/one hand.
  • Larry Weber (Feb 2008) Ch 3 s/on hand/one hand.
  • [email protected] (Feb 2008) Ch 15 s/of of/of .
  • Greg Herrington (Feb 2008) Ch 1, Clarification: no neutron in hydrogen atom.
  • mark44 (Feb 2008) Ch 1, s/naturaly/naturally/
  • [email protected] (February 2008) Ch 1, s/smokelsee/smokeless , s/ecconomic/economic/ .
  • Timothy [email protected] (Feb 2008) Changed default roman font to newcent.
  • Imranullah Syed (Feb 2008) Suggested centering of uncaptioned schematics.
  • davidr@insyst_ltd.com (april 2008) Ch 5, s/results/result 2plcs.
  • Professor [email protected] (Oct 2008) Ch 6, s/g/c near Ecd and near 00435.png, 2plcs.
  • John Schwab (Dec 2008) Ch 1, Static Electricity, near Charles Coulomb: rearrangement of text segments.
  • Olivier Derewonko (Dec 2008) Ch 4 s/orientation a voltage/orientation of a/. Ch2 s/flow though/flow through/. Ch Safe meter usage, REVIEW, s/,/./ . Ch5, s/is it/it is/.
  • [email protected] (June 2009) Ch 1, s/nusiance/nuisance.
  • [email protected] (September 2009) Ch 8, s/logarithmic/nonlinear , 6-plcs.
  • David [email protected] (September 2009) Ch 1, hide paragraph: Physical dimension also impacts conductivity. . . etc.
  • Walter [email protected] (January 2010) Ch 3, s/hydration another/hydration is another/ .
  • [email protected] (January 2010) Ch 6 , s/must were/were/ .