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

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
Ethernet C (2 models)
Internal Network Adapters
Lexmark MarkNet Pro (3 models)
External Network Adapters
Ethernet D
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
X820e controller card
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.
EVT X820e controller card

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:

From 2002 to 2013, under John Barnes' ownership and operation, dBi:

Go to Main Web Site Index Go to Full Standards Index Go to ITE Standards Index Go to Residential/ Commercial Standards Index Go to Industrial Standards Index
Go to Lab Equipment Standards Index Go to Audio/ Video Equipment Standards Index Go to Lamps/ Luminaires Standards Index Go to Appliance Standards Index
Last revised December 19, 2010.