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, February 28, 2026

When Theory Meets Practice (Part 2)


The is an idiomatic phrase coined by Indochinese Thai vendors. It implies things are similar yet distinct, and often used to describe fakes, alternatives, or nuanced differences.  The same is true with theory and practice. What we learned in theory should work in practiee. But any experienced engineer will tell you that's not the case.

My years in the Polytechnics certainly had their highs and lows. The highs were, of course, the projects I got to build in my second and third years. The low? A lecturer who was mediocre. Not incompetent, exactly—he knew the material well enough to recite it from the textbook. But his knowledge ended where the textbook ended. And he taught us electronics!

It was frustrating. Demoralizing. A class of eager students, hungry to understand, met with a teacher who could only point at words on a page. We learned despite him, not because of him. That mediocre instructor was a regrettable blot in my tertiary study—but in hindsight, he taught me something valuable. 

Not about electronics, but about teaching. About the difference between knowing a subject and being able to share it. About the kind of educator I would try to become, years later, when I sat down to write my first book.

 

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