To My Readers



If this is the first time you're visiting my blog, thank you. Whether you're interested or just curious to find out about PCB reverse engineering (PCB-RE), I hope you'll find something useful here.

This blog contains many snippets of the content in my books to provide a more detailed overall sampling for my would-be readers to be better informed before making the purchase. Of course, the book contains more photos and nice illustrations, as evidence from its cover page. Hopefully, this online trailer version will whet your appetite enough to want to get a copy for yourself.

Top Review

I started doing component level repair of electronics with (and without) schematics more than 40 years ago, which activity often involves reverse-engineering of printed circuit boards. Although over the years my technical interests have shifted into particle beam instrumentation, electron microscopy, and focused ion beam technology fields, till this day——and more often than not——PCB repairs have returned multiple multi-million-dollar accelerators, FIB, and SEM instruments back to operation, delivering great satisfaction and some profit.

Many of the methods described by Keng Tiong in great details are similar to the approaches I've developed, but some of the techniques are different, and as effective and useful as efficient and practical. Systematic approach and collection of useful information presented in his books are not only invaluable for a novice approaching PCB-level reverse engineering, but also very interesting reading and hands-on reference for professionals.

Focus on reverse engineering instead of original design provides unique perspective into workings of electronics, and in my opinion books by Keng Tiong (I've got all three of them) are must-read for anybody trying to develop good understanding of electronics——together with writings by Paul Horowitz and Winfield Hill, Phil Hobbs, Jim Williams, Bob Pease, Howard Johnson and Martin Graham, Sam Goldwasser, and other world's top electronics experts.

Valery Ray
Particle Beam Systems Technologist

Saturday, April 30, 2022

Passive Discrete - Inductors

Back to basics (covered in Deciphering Schematics):

Resistors, capacitors, and inductors are primary types of passive discrete components. In their most basic form, they come with two-terminals, through-hole or SMD. The chart below shows the types of inductors:

Inductors are coils with one or more windings of conductive wire wrapped over a medium (air, ferrite, etc.). Current flowing through an inductor induces a magnetic field that serves as a storage of energy (i.e., Eb = -L[ΔI/Δt]). It also generates a counter electromotive force (plus induced current) that restricts the flow of alternating current while allowing direct current to pass through. 


Thursday, April 28, 2022

Passive Discrete - Capacitors

Back to basics (covered in Deciphering Schematics):

Resistors, capacitors, and inductors are primary types of passive discrete components. In their most basic form, they come with two-terminals, through-hole or SMD. The chart below shows the types of resistors:

Capacitors has the ability to store electrical charge exponentially, the amount of charge being determined by the capacitance value and the voltage applied across the device (i.e., Q = CV). One important use of capacitors is passing alternating current while blocking direct current, also known as ‘AC coupling’.

 

Wednesday, April 27, 2022

Passive Discrete - Resistors

Back to basics (covered in Deciphering Schematics):

Resistors, capacitors, and inductors are primary types of passive discrete components. In their most basic form, they come with two-terminals, through-hole or SMD. The chart below shows the types of resistors:

Resistors oppose (restrict, limit) the flow of current and are employed to control current and manage voltage levels in a circuit. The relationships between resistance, voltage and current conform to Ohm’s Law such that current is proportional to the applied voltage and inversely proportional to the resistance (i.e., V = IR).


Saturday, April 16, 2022

A Special Birthday Request

Two days ago, I celebrated my wife's birthday. She did not ask for anything fanciful or expensive, just something simple: kite flying. So I bought her a beautiful butterfly kite that could be easily self-assembled and we went to a nearby coastal park after breakfast to fly it. Thankfully the weather was sunny with a cool breeze, which made kite flying a breeze (pun intended).

See how happy and delighted she was? That's the simple pleasure of life!

As it was a weekday, there were not many people around so we literally had the whole field to ourselves, which was kinda nice. Since the kite was on 'auto-pilot' we decided to sit near the shoreline and listen to the waves splashing while enjoying some quiet moments together. A few passers-by seemed absorbed with the quiet fun we're having, and one even requested to take a snapshot for us. For lunch, I treated her to a vegan Thunder Tea rice.

It's my way of showing appreciation and saying thanks to her for being supportive of my writing journey the past six years, this year being the seventh and probably the last. Thanks, my love, for being there and encouraging me to fulfil my dream and passion as an author!

Tuesday, April 12, 2022

A Worthy Mention

Books on hardware hacking are on the popular rise and there are a few notable titles that aspiring hackers can learn from. One book, in particular, is The Hardware Hacker's Handbook by Jasper van Woudenberg, which is really about overcoming embedded security.

I'm not giving a review here, in case you're wondering; rather, I was surprised and delighted that the author of this best seller mentioned my sequel, PCB-RE: Tools & Techniques in Chapter 3 (page 106) of his book, which I have produced and highlighted below:

It's always a nice feeling when your work is noticed by another author, a practice I engaged in my own writings to point interested readers to useful sources who want to learn more about a particular related topic. As always, the first and sequel PCB-RE books seem to be a natural choice for those starting out in their PCB-RE journey.

Writing engineering books is hard work that doesn't guarantee success unless there are good reviews and wide publicity from readers and supporters. So I'm counting on you, my friends, to spread the word and help recommend my books. Thanks in advance!

Monday, April 11, 2022

Spoiler Alert!

If there's anything to indicate what you'd be getting from Deciphering Schematics, besides nicely drawn (and well-proportioned) schematic diagrams, there will also be beautiful illustrations such as that found in the following two-page sample from Chapter 5:

Sure, it's going to cost me time and effort to come up with all these vector-based drawings. As an author who writes engineering books that bear my name, I'm not about to let poor reading experience leave a black mark on my hard work. I want readers who buy my books to be assured of the best quality, knowing they are worth every cent of it. And I certainly hope readers will give me the assurance in kind through honest purchases too.

But I can only leave it to personal integrity and just do my part well. In the end, as they say, everything will even out. Meanwhile, stay safe and well, my friends.

Thursday, April 7, 2022

Update on Chapter 5

Been working relentlessly on this chapter for the past couple of weeks and nearing completion. By far, this is the most interesting chapter to write. I've covered quite a bit on the elements of analog circuits, from the issues of discrete versus integrated, passive versus active, and mechanical versus solid-state, on to circuit topologies involving transistors, MOSFETs and operational amplifiers.


Trying to cover every aspect of analog circuits is near impossible, so I choose to highlight the essentials and what topologies best represent the elements discussed. Hopefully readers will catch on and expand on what they have learned to further enrich their understanding in deciphering schematics. Of course, I will follow on with a chapter that showcase a full-blown analog circuit and how to go about making sense of its functionalities and design. After all, what is theory if there is no practice, right?

As to why I decided to write this book before PCB Diagnostics (which I started out after completing the PCB-RE series) is because I realize that understanding circuit diagrams is an important key to repairing circuit boards. For readers who have no foundation in electronics, this book will give a good overview of what constitute digital, analog and hybrid circuit designs, with an added bonus on power supply circuits.

It should be a book worth waiting for, though it's by no means easy on my part to write it, coming from the perspective of someone wishing there is a better way to be given a broad overview of electronics  (interesting and informative enough without all the nitty-gritty details) and the know-how in decoding the blueprint that made up these circuits.