Electronics


Electronics and Communication

Electronics is that branch of science and technology which makes use of the controlled motion of electrons through different media and vacuum. The ability to control electron flow is usually applied to information handling or device control. Electronics is distinct from electrical science and technology, which deals with the generation, distribution, control and application of electrical power. This distinction started around 1906 with the invention by Lee De Forest of the triode, which made electrical amplification possible with a non-mechanical device. Until 1950 this field was called “radio technology” because its principal application was the design and theory of radio transmitters, receivers and vacuum tubes.
Most electronic devices today use semiconductor components to perform electron control. The study of semiconductor devices and related technology is considered a branch of physics, whereas the design and construction of electronic circuits to solve practical problems come under electronics engineering. This article focuses on engineering aspects of electronics.

Digital Electronics

Analog Electronics

are electronic systems with a continuously variable signal, in contrast to digital electronics where signals usually take only two different levels. The term “analogue” describes the proportional relationship between a signal and a voltage or current that represents the signal.

Network Theory

Semiconductor

Electromagnetics

links

Vacuum tube

Electronics experiment

Circuit Theory

Electrical Circuit

Battery

An electrical battery is a combination of one or more electrochemical cells, used to convert stored chemical energy into electrical energy. Since the invention of the first Voltaic pile in 1800 by Alessandro Volta, the battery has become a common power source for many household and industrial applications. According to a 2005 estimate, the worldwide battery industry generates US$48 billion in sales each year, with 6% annual growth.
Batteries may be used once and discarded, or recharged for years as in standby power applications. Miniature cells are used to power devices such as hearing aids and wristwatches; larger batteries provide standby power for telephone exchanges or computer data centers.

basics of electronics and communication, resistor, capacitor, inductor, amplifier, oscillator, semiconductor, network analysis, digital electronics,


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