Lessons in Electric Circuits

Are you looking for a good source of information to get started into making and hacking electric circuits? We would like to refer you to Lessons in Electric Circuits. Even if you have good knowledge of electronics, this is another tool you can use. The book is a work in progress and will have some incomplete and pending areas, but the basic theory parts to get started are all there. It has six volumes: DC, AC, Semiconductors, Digital, Reference, and Experiments. The DC and AC volumes are the most complete. If your eyes are already glazing over thinking you already know all of this stuff, then the most interesting volume for you may be the Experiments, which contains a number of sample circuits like transistor amplifiers and 555 timer circuits. The best part of this book it that it is free, but as with most free things, you can make it better by contributing.

Via Adafruit Industries.


  1. Pouncer says:

    Very nice! Thanks for posting it.

  2. biozz says:

    there very nice and informative!

    but am i the only one wondering whats up with these 1960s unrelated pictures of nature? XD

  3. Skully says:

    This is great. I’ll hang onto this one.

  4. Reaper says:

    That’s pretty awesome.

  5. Koray says:

    This is excellent! Now I should find a way to convert the site to epub for my Reader.

  6. blue carbuncle says:

    Nice Resource :) Thanks subby/HaD :)

  7. chris says:

    Good resource. Thank you very much, for posting.

  8. e-rock says:

    As a EE student all i can say is:

    This is amazing…

  9. xeracy says:


    this Java Circuit similator has done more for my practical understanding of circuitry than any book or tutorial. Just wanna pass it along.

  10. xeracy says:


  11. Whoever says:

    Am I the only one who LOLed at the clever relation between the pictures and the topics?

  12. D_ says:

    @Whoever, I really didn’t pay attention to them until biozz mentioned it Understanding rarely do technical books use art on the cover for the sake of pretty art, I took a second look. The first 2 volumes are obvious. A 1 line road for DC, a 2 lane road for AC. The others are bit more subtle.

    The ebooks are an excellent resource. I recommend them along with the the USN Naval Electricity Electronic Training Series. In that NEETS is not readily available for download anymore, those may get the nod more. http://www.falstad.com/circuit/ like older technology animations, and just plain old building circuits and measuring the results, does support text books. However INO with out textbooks animations alone lead some to come up with some strange unsupported conclusion. Except for those animations that include that theory in the video, something the java does not included. Thanks for pointing us to this Devlin.

  13. WootWoot says:

    Now, I never ever comment, but I had to say, thanks for the information, you’ve made one more person happy. (:

  14. qwerty says:

    Speaking of simulators, ktechlab is a nice one that allows writing code them emulating PIC microcontrollers along with analog stuff.


  15. Per Jensen says:

    WTF has the pictures to do with electronics ?!

  16. Andrei says:

    This same book appears to be available also at:


  17. walt says:

    :) thx

  18. pork says:

    does a good forum exist for chatting about projects. from time to time, I’d like to bounce my ideas off of some other electronics peeps. would also come in handy when I am deep into a project and hit a wall.

  19. aman verma says:

    sorry.. But the books are too basic.. can u give me spme more advanced circuit book

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