Useful EE Links and Search Engines

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The discussion focuses on sharing useful links for technical content and search engines related to electronics, emphasizing free resources rather than paid services. Key recommendations include datasheet search engines like DatasheetPro and FindChips, as well as parametric search capabilities from Digi-Key and Mouser. Additional resources include the US Patent Office database, Wolfram Alpha, and various educational sites for beginner electronics projects and lectures. The conversation also touches on search engine optimization (SEO) techniques for improving the visibility of datasheets online. Overall, the thread serves as a valuable compilation of tools and resources for electronics enthusiasts and professionals.
  • #31
Chapter 9 of The Art of Electronics, 3rd edition, is freely (and legally!) available, for details see the begin of this review:

http://www.wisewarthog.com/electronics/horowitz-hill-the-art-of-electronics-3rd-edition.html

Even if you are not interested in the book, the free chapter is a good stand-alone resource on voltage regulation: 42 pages on linear voltage regulators, 38 on switchers and 11 on voltage references.
 
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  • #32
FREE - Arduino ... well Virtually - Autodesk 123D.

Found this 123D site -- basically simulate circuits ( basic ones anyway) and has an arduino simulator and programmer, serial monitor - etc. - All webbased so you can use it anywhere that you have a connection.

Can switch from Breadbord to Schematic to PCB lay out views - even at this very simple level this is pretty powerful tool.
 
  • #34
From a recent thread in the EE forum asking about outlet ratings and the National Electric Code (NEC):

EM_Guy said:
This is a good article: http://ecmweb.com/code-basics/branch-circuits-part-one

In short, if you have more than one receptacle on a 20-A branch circuit, then the NEC permits receptacles rated at 15 A.

jim hardy said:
try a search on NEC 210.21(B)(2)
one of the early hits i got:

http://ecmweb.com/code-basics/branch-circuits-part-2

EM_Guy said:
Thanks, Jim!

This is another good source: http://freenec.com/T28.html
 
  • #35
Another useful website is www.everythingRF.com - Targeted at the RF & Microwave Electronics Industry.
 
  • #36
  • #38
I haven't seen a lot of inquiries about Cable Tray Systems over the years, but currently there's a thread inquiring about tray flanges which is leading to other questions. There are NEC codes & NEMA guidelines to follow and Cabletrays.org has a Cable Tray Systems FAQs that should be helpful to some.
 
  • #40
Here's a good learning resource, posted by a new user in an EE thread:
DownrangeBean said:
For anyone else who comes across this problem of feeling like they need to have a complete or foundational understanding for wrapping their heads around transistors and the PN junction (I did).

Try this link: http://www.allaboutcircuits.com/textbook/semiconductors/#chpt-2
Goto chapter two. They build you up from the very bottom, starting with quantum physics (although just what you need to know to understand the rest) and electrons and holes. As well as explaining the workings of different types of semiconductor components.
 
  • #41
Free online circuits simulator

http://circuits-cloud.com/

You can design and simulate digital and analog circuits.

You can also refer to the pre-built circuits library. This library contains different digital and analog designs, you can collect different ideas from this library.
 
  • #42
Sensors, transducers of physical quantities, the principles of their work:: http://senphys.com
 
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  • #45
Hi there everybody here is the collection of educational Links you will love to read and learn:
  1. Lessons in Electric Circuits: It is a collection of textbooks on Electrical and Electronics Engineering. It covers electrical subjects like AC, DC, Semiconductors, Digital logic design, Electrical Machines, Transformers and a wide range of electrical subjects. You can either go through these online or can download the books for free.
  2. Hyperphysics: It is designed by C.R NaveGeorgiaia State University). A bulk of data on different Electricity Engineering subjects is available.
  3. WolframAlpha: You can perform different calculations using Wolfram Alpha.
  4. Electrical Calculators: A useful website to perform different electrical calculations.
 
  • #47
Hi there here are some useful handy websites that I used during my Electrical Engineering study:
  1. Hyperphysics Education: A one-stop solution for learning Electrical Physics.
  2. MIT Open Courses web: A website for online Electrical Courses
  3. Reddit Electrical Community: A community for Electrical problems discussions.
  4. Free Electrical Lessons by Kuphaldt: This website contains 6 different books on Electrical by Kuphaldt that are good enough for providing all info on your EE. Above all these are free to download and use.
So here was all my list. Share yours too in comments.
 
  • #48
  • #49
DIY websites:
hackaday.io
allaboutcircuits.io
arduino.cc
 
  • #50
Nice post elsewhere on the PF about a free textbook on QM for Engineers. I like how it starts with a review of what I learned in undergrad, and moves on to so many of the concepts that are discussed here on the PF in the Physics QM forums. :smile:
smodak said:
and it is free (legal)

Quantum Mechanics for Engineers by Dommelen
 
  • #51
And a nice link by @Crass_Oscillator to a reference for learning about Semiconductor Devices (from a thread about that subject):
Crass_Oscillator said:
This is a pretty comprehensive free textbook with an introduction to the physics assuming little background, as it is intended for electrical engineering students who usually have taken at most one quantum mechanics course (and that is still uncommon):
http://ecee.colorado.edu/%7Ebart/book/
Crass_Oscillator said:
It's actually a pretty good book, aside from a few poorly written passages here and there, along with some typesetting problems.
 
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  • #52
berkeman said:
And a nice link by @Crass_Oscillator to a reference for learning about Semiconductor Devices (from a thread about that subject):
Yes indeed; very useful. I just checked and found that I bookmarked this on 6-20-2011.
 
  • #54
Nice pointer by new user @Bcavender to some low-cost (free for the limited version) FEA software "LISA", most likely written by a fellow HAM radio enthusiast:
Bcavender said:
A great example in the medium productivity software level space is LISA. It is a really nice basic FEA package that imports a variety of common 3D file formats for well above trivial level designs and costs $300. I am guessing that this venture is a one man show, but both the software and support are top shelf. It does 80% of what I find necessary for good/economic design and saves a great deal of wheel-reinvention on my part. From the verbose responses to support questions, you can tell the gent behind the package lives, breathes and loves practical, usable FEA. He appears to be having a ball.
http://www.lisa-fet.com/
 
  • #55
berkeman said:
http://www.lisa-fet.com/
I'm was trying to figure out what "free/affordable" meant from their website.
So the free version is limited to 1300 nodes, otherwise purchase.
 
  • #58
Very nice Opamp Application Note via @jim hardy from a current thread on Opamp questions from newbies:

jim hardy said:
I notice AN31 is still around but it's now a TI document (TI bought National some years back).
The questions must have persisted because they now show power supply connections in their sample circuits.
Here's a link - have fun !
http://www.ti.com/lit/an/snla140c/snla140c.pdf
 
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  • #59
berkeman said:
Nice link by @Windadct about "Magnetics in Switched-Mode Power Supplies" from OnSemi:
Agreed. Very useful circuit diagrams
 
  • #60
Although I've never read much of the great analog designers of;
J. Williams, RA. Pease, Horowitz & Winfield and now Basso in SMPS design, I found my experiences common to what I have seen and learned a few things.

If you want to learn what isn't on LTspice schematics, you ought to find these books online or in Archive.org.


https://archive.org/details/Bob_Pease_Lab_Notes_Part_1/page/n19/mode/2up?q=Bob+Pease 109 pages
https://ia902808.us.archive.org/22/items/bobpeaselabnotespart8/Bob Pease Lab Notes Part 8.pdf how to troubleshoot 112 pages
https://archive.org/details/Bob_Pease_Lab_Notes_Part_3/mode/2up?q=Bob+Pease 498 pages
http://www.apple1.fr/student_manual_for_the_art_of_electronics.pdf
Thomas C. Hayes, Paul Horowitz, Harvard University 622 pages
https://www.jotrin.com/userfiles/downloadfile/202003121610523330.pdf World class designs 461 pages
https://cbasso.pagesperso-orange.fr/Downloads/PPTs/Chris Basso APEC seminar 2012.pdf 143 pages The Dark Side of Loop
Control Theory SMPS
 
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