Electronic Equipment

John R. Barnes KS4GL, PE, NCE, NCT, ESDC Eng, ESDC Tech, PSE, Master EMC Design Engineer, SM IEEE
December 19, 2010

Companies and organizations develop equipment for their internal use, typically to: The design requirements for equipment tend to be moving targets, constantly evolving as the associated product(s) are tweaked, enhanced, and redesigned: Because we usually build only one or a few copies of each piece of equipment, we can afford to build in some extra capabilities up front to cover the uncertainties associated with the project. For accurate measurements we want the equipment to be at least 3 to 10 times as accurate as the parameters we are trying to measure. A well-integrated development environment with powerful debugging tools can greatly reduce programming time, even if the resulting code is somewhat inefficient. To keep from slowing down development by running into artificial limits, we usually want to provide for: The safety requirements for equipment are usually based on the company's/ organization's internal standards and voluntary industry standards. Since we control the equipment, who uses it, and when/ where/ how it is used, we can provide safe working conditions by a combination of: We can get by with fairly skimpy parts/ materials specifications for equipment, because we usually buy enough for the life of the program in one lot. Similarly, the manufacturing/ test documentation for equipment may be sparce, perhaps some sketches and an engineering notebook, because most of the assembly and debugging will be done under the direct supervision of the equipment designer. Repair and service documentation should be fairly complete, because the equipment designer may not be available when they are needed.

Because of the small quantities needed, we will usually be limited to off-the-shelf power supplies or product power supplies for equipment. Moving equipment to another country may require redoing some of the primary wiring:

Flexibility tends to be more important than an "optimum" design, letting us develop electronic equipment quickly while holding down the engineering and programming costs. In many cases we will adapt/ enhance a previous design instead of doing a new design from scratch. We also tend to be very conservative in our design and selection of subsystems, parts, and materials, to minimize the risks associated with the project. In general, we want to limit our custom development of equipment to:
dBi Corporation was a one-man ISO 17025-accredited electromagnetic compatibility (EMC), electromagnetic interference (EMI), and electrostatic discharge (ESD) test house (testing laboratory) based in Lexington, Kentucky. dBi was founded in 1995 in Winchester, Kentucky by Donald R. Bush, shortly after he retired from 30 years service with IBM Lexington's/ Lexmark's EMC Lab. John R. Barnes 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 has increased our operating expenses to the point that we can no longer afford to remain in business.

We'd like to thank all of the clients who chose us to test their products from 1995 to 2013. Below is a brief summary of dBi's 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:

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Last revised December 19, 2010.