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

Monday, March 13, 2017

My Stand on Copyright

Whilst copyright laws exist to discourage or keep at bay would-be competitors (or even pirates) from stealing the designs and ideas for their own commercial gains, PCB reverse engineering services are still very much sought after, more as a desperate attempt to resolve the genuine problems of obsolescence or lack of support, and in such cases the PCBs reproduced are usually intended for internal consumption and not external circulation. Confidentiality and non-disclosure agreement (NDA) will also ensure that only the customer and the service provider are the only parties in the know.


It's a fine line we're treading when we do reverse-engineering of any sort. We need to ask ourselves why we're doing what we're doing, and whether we're doing it out of necessity on a personal capacity to get our job done, or out of curiosity when a certain PCB design so intrigued and interests our engineering senses that we couldn't pass it by without knowing what makes it tick. Frankly, troubleshooting and diagnosing PCBs without documentation invariably involves some degree of reverse-engineering, albeit in a less systematic and perhaps haphazard way. Prior to taking up reverse-engineering using Visio, I did what many repair technicians or engineers would do when stumped with a PCB without schematics—create partial sketches of the circuits I was analyzing, hand-drawn or with the help of primitive graphics editor.

Having said that, I personally do not endorse PCB reverse engineering to be used as a tool for anti-competition or theft of design, in which the end result is the financial lost of the rightful designer or company concerned. I believe that as an engineer, there is a code of honor to live by and uphold, by which personal enrichment and knowledge can be gained and shared, but not at the expense of others.

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