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Dazzle is a family of external video capture devices that record video from analog sources over USB. Learn about its history, features, and models from 1997 to present.
A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a desktop computer. Learn about the history, functions, types and standards of PSUs, and how they differ from power supply units in other contexts.
A single-line diagram is a symbolic representation of an electric power system, showing power flows and elements such as generators, transformers, and circuit breakers. Learn how to use one-line diagrams for power flow studies, balanced and unbalanced systems, and per-unit system.
Line regulation is the ability of a power supply to maintain a constant output voltage despite changes to the input voltage. Learn the formula, the importance and the examples of line regulation, and how it differs from load regulation.
Learn about the history, theory and applications of transmitting electrical power or signals using only a single conductor. Find out how resonance, capacitance and surface waves are involved in this method.
A number of ground-level power supply systems were developed from the 1970s through the 1990s, [8] but were not reliable or safe enough for commercial use. [9]The first ground-level power supply system developed to modern safety standards was the Ansaldo Stream, [7] although a competing system, Alstom APS, was the first to be commercially implemented in 2003.
Backdoor compared with the dominant (front door) in the chromatic circle: they share two tones and are transpositionally equivalent. In jazz and jazz harmony, the chord progression from iv 7 to ♭ VII 7 to I (the tonic or "home" chord) has been nicknamed the backdoor progression [1] [2] or the backdoor ii-V, as described by jazz theorist and author Jerry Coker.
Learn about the different types and applications of power-line communication (PLC), which is the carrying of data on a conductor that is also used for electric power transmission or distribution. Find out how PLC works, what frequencies and data rates are used, and what challenges and benefits it offers.