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24 Nov 2013


This is the first book of Giorgos Lazaridis covering the BJT Transistor Theory. The purpose of this book it to help the readers understand how transistors works and how to design a simple transistor circuit. It is addressed to amateur circuit designer with little or no previous knowledge on semiconductors. The book is written to be easy to follow, so it keeps mathematical formulas as simple as possible. Feel free to download and read it. More topics will be covered later.

The BJT Transistor Theory – [PDF]

11 Jun 2012

Book #1 : Starting with the electronics hobby – Free to download

Other 4 ebooks are available to purchase. John @ www.theelectronicsbook.com writes:

This book will teach you all the basic rules of the electric circuits world. It will guide you step by step with pictures and examples. More than 80 pages of theoretical and practical information.

This book includes the following subjects: Electric current, voltage, Resistance, Water-electronics analogy, Ohm’s law, Waveforms, What is a multi-meter?, Using multi-meter, Component’s part number, Symbols of components , Searching methods for components, datasheets, Resistance color code, Circuits with resistors , Experiment: Resistance measurement and many more basic rules of the electronic circuit.

No previous knowledge is required. Starting from the basics and moving on to practical electronics. Many examples and experiments on every electronic component. Full of pictures for better understanding.

Free ebook – Starting with the electronics hobby – [Link]

2 Nov 2011

adafruit.com writes:

PCB layout is tough. Laying out a PCB isn’t in itself too hard once you learn how the tools work, but high-speed (10MHz+) introduces a virtual mine field of potential issues that you may not be aware of until it’s too late. While experience is the best teacher, Analog Devices has a great application note explaining some of the key pitfalls to avoid when dealing with high speed designs (which is basically anything today): A Practical Guide to High-Speed Printed-Circuit-Board Layout. Some of it is a bit heady, but not more than it needs to be, and it really does lay out a lot of key information that you may not have been aware of. Want to improve your PCB design skills? Print this out, and keep reading through it until it starts to make sense. There’s years of bench time worth of information in there.

EEBookshelf: High Speed PCB Layout – [Link]

15 Sep 2011

Electronics design engineers across the globe are burdened with lengthy and disparate design processes – from concept to pre-production – all-while balancing the need to bring products to market faster.  In short, the ability to save hundreds of hours in the design process is critical to advancing designs.  

As part of an ongoing effort to better understand the needs of design engineers, element14 today unveiled findings from a global study conducted by TFI looking at the critical challenges throughout the design process.  The study revealed several pain points – increasing time pressures, incomplete/inaccurate information from relevant sources, and difficulty comparing options. Additional findings include:

  • Over 70% of design engineers rely heavily on online forums, blogs and engineering communities
  • Engineers spend about 50% of their research time online
  • A majority of respondents cited the earlier stages of design as the most challenging (consuming an average of 41% of design time)

“Design with Efficiency: Toward a Streamlined Process for Electronics-Industry Design Engineers” – [Link]


11 Sep 2011

TI’s guide showcases a wide range of standard analog products with features such as small packaging, performance and cost-savings, all designed to satisfy an extensive range of applications.

The new Standard Linear Guide includes:

  • Device details and tables
  • Key product information
  • Package options and pricing

Introducing TI’s first Standard Linear Guide  – [Link]

7 Sep 2011

The secret world of oscilloscope probes – [via]

The oscilloscope is an essential tool for anyone working in electronics. Whether you’re working in electronics service, production, testing R&D or in your home workshop, you need an oscilloscope. If you listen to a bunch of technical people chatting about their scopes, they’ll talk about their bandwidth or whether they have colour displays, depth of memory or portability but the probes rarely get mentioned. In fact, most users don’t think about their probes until they hear the sickening crunch underfoot which tells them they shouldn’t have left them dangling off the bench onto the floor. There are many varieties of “specialist” probes: active-FET probes, differential-floating probes, current- sensing probes are just some we could mention.

The secret world of oscilloscope probes – [Link]

26 Aug 2011

Tony R. Kuphaldt writes:

We live in a world where the accumulation of knowledge is exponential over time, and where the ability to continuously learn and make sound judgments is essential to survival. Formal education ought to play an important role in preparing individuals to succeed in this environment, but many traditional modes of education actually discourage development of independent thinking skills necessary for success.

The most important thing any educator can impart to a student, in any context, is the ability to teach themselves. When teachers dispense knowledge to students in the traditional lecture format — where students passively watch and listen — they deny students deep interaction with the subject matter. Furthermore, instructor-centered pedagogy assumes and reinforces the debilitating notion that education can only happen in the presence of a superior: You (the student) need me (the teacher) in order to learn.

Socratic Electronics – [Link]

24 Aug 2011

Keithley Instruments, Inc has published an electronic handbook titled “Making Precision Low Voltage and Low Resistance Measurements”. The handbook, which offers instant online access to a wide range of Keithley application notes, white papers, webinars, and many other references, was developed to help readers solve today’s toughest low level measurement challenges. It can be downloaded at no charge from the url below. [via]

A number of topics related to low voltage measurements are addressed in the handbook:

  • Offset voltages
  • Noise
  • Common-mode current and reversal errors
  • Low resistance measurement topics covered include:
  • Lead resistance and the four-wire method
  • Thermoelectric EMFs and offset compensation methods
  • Non-ohmic contacts
  • Device heating
  • Dry circuit testing
  • Testing inductive devices

Free E-Handbook on low voltage, low resistance measurements – [Link]

22 Aug 2011

The Tektronix Learning Center provides you with access to all the latest online tutorials and resources — from primers and white papers to demos and webinars — to help grow your expertise.

Tektronix learning Center – [Link]


22 Aug 2011

Free license study guides

Dan KB6NU writes:

Currently, I offer study guides for the first two license classes, the Technician Class and the General Class, and I’ll be publishing a study guide for the Extra Class license next year.

I call them “no nonsense” license study guides because all I cover are the questions that might appear on the test. The philosophy behind this is that the quicker someone gets a license, the sooner they’ll really be able to learn about the hobby, whether that’s electronics or antennas or propagation or whatever.

The study guides are available in three different formats:

  1. FREE! There’s a free PDF download available from my website.
  2. E-book. There are Kindle and Nook e-book versions available from the Amazon and Barnes&Noble websites. The cost for the e-book version is $7.99.
  3. Print. Yes, a dead tree version is available if you really want one. These cost $12, shipped, and are also available from my website.

Amateur Radio No-Nonsense Study Guides – [Link]





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