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Published to Pinoy Celebrity
Wikizines are interactive magazines that anyone can create or edit - and this one is called "Pinoy Celebrity". Here you can find fresh voices and respond in real time. Some members write articles about recent news and trends related to the wikizine's topic, others recount relevant personal stories or share their favorite pictures and video clips. Got an interesting idea or story to share with other members of this wikizine? Well, then put on your journalist's cap and add y... Read Full Story
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Published to Diether Ocampo
Wikizines are interactive magazines that anyone can create or edit - and this one is called "Diether Ocampo". Here you can find fresh voices and respond in real time. Some members write articles about recent news and trends related to the wikizine's topic, others recount relevant personal stories or share their favorite pictures and video clips. Got an interesting idea or story to share with other members of this wikizine? Well, then put on your journalist's cap and add yo... Read Full Story
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Published to Electronics
Uses of Electronic Devices Electronic devices are used as tools in many areas of advanced research. Shown here is a Scanning Electron Microscope which uses electrons to produce a highly magnified image on a computer screen. Electronics, field of engineering and applied physics dealing with the design and application of devices, usually electronic circuits, the operation of which depends on the flow of electrons for the generation, transmission, reception, and storage of information. Th... Read Full Story
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Published to Electronic Gadgets - Home ELectronics
The introduction of vacuum tubes at the beginning of the 20th century was the starting point of the rapid growth of modern electronics. With vacuum tubes the manipulation of signals became possible, which could not be done with the early telegraph and telephone circuit or with the early transmitters using high-voltage sparks to create radio waves. For example, with vacuum tubes weak radio and audio signals could be amplified, and audio signals, such as music or voice, could be superim... Read Full Story
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Published to Organic light-emitting diodes
Light-Emitting Diode (LED) A diode is an electronic component through which current passes in only one direction. Light-emitting diodes (LEDs) are semiconductors that produce light when current passes through them. They are used in many common devices, such as the tuning indicator on a radio. An arrangement of seven LEDs in the shape of an ‘8’ can be used to display any number from 0 to 9. This arrangement is often used on calculators and digital watches.
Electron... Read Full Story
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Published to oil-regeneration
Most electronic equipment requires DC voltages for its operation. These can be provided by batteries (see Battery) or by internal power supplies that convert alternating current as available at the home electric outlet, into regulated DC voltages. The first element in an internal DC power supply is a transformer, which steps up or steps down the input voltage to a level suitable for the operation of the equipment. A secondary function of the transformer is to provide electrical gro... Read Full Story
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Published to Abs-Tech
Electronic amplifiers are used mainly to increase the voltage, current, or power of a signal. A linear amplifier provides signal amplification with little or no distortion, so that the output is proportional to the input. A nonlinear amplifier may produce a considerable change in the waveform of the signal. Linear amplifiers are used for audio and video signals, whereas nonlinear amplifiers find use in oscillators, power electronics, modulators, mixers, logic circuits, and other applications... Read Full Story
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Published to Free Electronics
Oscillator Circuit
This illustration shows a simplified schematic diagram of an oscillator circuit. The tuned circuit contains an inductor coil L1, a smaller inductor coil L2, and a capacitor C.
Oscillators generally consist of an amplifier and some type of feedback: The output signal is fed back to the input of the amplifier. The frequency-determining elements may be a tuned inductance-capacitance circuit or a vibrating crystal. Crystal-controlled oscillators offer the highest precis... Read Full Story
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Published to Deborah Kara Unger
Digital Logic and NOR Gate Circuitry
Computers use digital logic to perform operations. Digital logic involves making successive “true” or “false” decisions, which may also be represented by 1 and 0, respectively. Logic circuits, which are at the heart of computer chips, are designed to make a series of these decisions via junctures called gates. Gates are designed and arranged to make different kinds of “decisions” about the input they receive. Individual input and output value... Read Full Story
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Published to Electronics
VIII RECENT DEVELOPMENTS
The development of integrated circuits has revolutionized the fields of communications, information handling, and computing. Integrated circuits reduce the size of devices and lower manufacturing and system costs, while at the same time providing high speed and increased reliability. Digital watches, hand-held computers, and electronic games are systems based on microprocessors. Other developments include the digitalization of audio signals,... Read Full Story
