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Being able to produce a well designed object oriented system is an important skill to master. The old saying "owning a hammer does not make one an architect: is especially true for object oriented development. Knowing an object oriented language such as Java is not sufficient alone for the production of object oriented systems. During OO Analysis there is a focus on finding and describing the objects and/or concepts in the problem domain. During OO Design there is a focus on defining the objects that will ultimately be implemented in an OO programming language.

Here is a design guide from Linear Technology describing how to design boost power supplies that can work from as little as 0.7 volts. These constant voltage power supplies that can run off until nearly every last drop of power is consumed. [ ]