ROBUST ELECTRONIC DESIGN
My Products That Went into Mass Production
This web site is being maintained by John R. Barnes, who was the President
and Chief Engineer of dBi Corporation from 2002 to September 30, 2013,
when we closed because ObamaCrap made it too expensive for us to remain in
business.
John R. Barnes KS4GL, PE, NCE, NCT, ESDC Eng, ESDC Tech, PSE, Master EMC
Design Engineer, SM IEEE
December 19, 2010
jrbarnes@iglou.com
Here are pictures of some of the over 35 IBM
and Lexmark products I
designed/developed, and helped put into mass production since 1990, in roughly
chronological order.
IBM 4033 (6 models)
External Network Adapters
|
Lexmark MarkNet XL (5 models)
Internal Network Adapters
|
Lexmark MarkNet XLe (4 models)
External Network Adapters
|
Ethernet C (2 models)
Internal Network Adapters
|
Lexmark MarkNet Pro (3 models)
External Network Adapters
|
Ethernet D (1 model)
Internal Network Adapter
|
Lexmark MarkNet X2000 (3 models)
Internal Network Adapters
|
Lexmark MarkNet X2000 (4 models)
External Network Adapters
|
Lexmark MarkNet S (3 models)
Internal Network Adapters
|
Lexmark OptraImage (4 models)
Digital Office product
|
Lexmark X820e MFP (2 models)
Digital Office product
|
Controller Card for
Lexmark X820e MFP
|
My Controller Card for the Lexmark X820e MFP won 3rd place (Consumer
Electronics division) in the 2002
Mentor Graphics Technology Leadership Awards. This card has a 350MHz x86
microprocessor, can take up to 1GB of 100MHz SDRAM, and has 950 components in
the schematic, of which about 850 are populated. It went into production on
its second spin-- fully functional and meeting international
requirements for product safety, electromagnetic compatibility (EMC),
electromagnetic interference (EMI), and electrostatic discharge (ESD)
immunity.
Below is what the first spin of this card, the Engineering Verification Test
(EVT) version, looked like. We got the first card working one week after
building 20 EVT cards. A week later we had 18 of the cards working and
ready for programmers and other developers. (We never did manage to get the
last two cards working...) We wound up having to drill out one pin in the
microprocessor socket (to remove a +3.3V-to-ground short), remove two
resistors, cut two traces, and add three short wires to make these EVT cards
fully functional.
dBi Corporation was a
one-man test house (testing laboratory) based in Lexington, Kentucky, testing
a wide variety of commercial electronic products for electromagnetic
compatibility (EMC), electromagnetic interference (EMI), and electrostatic
discharge (ESD) under its ISO 17025 accreditation. dBi was founded in
Winchester, Kentucky in 1995 by Donald R. Bush, shortly after he retired from
30 years service with IBM Lexington's/ Lexmark's EMC Lab. John R. Barnes,
who'd worked with Don at IBM Lexington and Lexmark, bought dBi in 2002
after Don's death, and moved the company to Lexington, Kentucky. John closed
dBi at 11:59pm EDT on September 30, 2013, because ObamaCrap had
increased operating expenses to the point that we could no longer afford to
remain in business.
We'd like to thank all of the clients who chose dBi to test their
products from 1995 to 2013. Below is a brief summary of our accomplishments
during the 18 years we were in business.
From 1995 to 2001, under Don Bush's ownership and operation, dBi:
- Did the official approval testing of 141 products developed by 20
client companies.
- Did the official FCC/ Industry Canada (IC) Verification and Declaration
of Conformity (DoC) testing of 92 products.
- Did the official FCC/IC Certification testing of 15 products.
- Did the official CE Marking testing of 100 products.
From 2002 to 2013, under John Barnes' ownership and operation, dBi:
- Tested 389 products and 2 testers developed by 44 client companies.
- Did the official approval testing of 357 products and 2 testers, getting
all but 5 of them to meet all of the FCC, Industry Canada
(IC), CE Marking, C-Tick, and Regulatory Compliance Mark (RCM) standards
and requirements for their desired market areas.
- Did the official FCC/IC Verification and Declaration of Conformity (DoC)
testing of 296 products.
- Did the official FCC/IC Certification testing of 24 products.
- Did the official CE Marking testing of 271 products and 2 testers.
- Did the official e-Mark testing of 3 products.
- Did the official Australia/New Zealand Verification testing of 170
products.
- Co-sponsored John's writing the
Robust Electronic Design Reference Book,
Volumes I and II.
- Served as an expert witness on electronics in three lawsuits.
Last revised December 19, 2010.
