Survey of Electronics

Electronics, radio, and television are practical applications of general principles of electricity. The same electric current produced by battery for a flaslight can also be used in man different ways. Some examples are running a mtor producing heat and light for electric power applications, while electronic calculators and computers illustrate more advanced applications in digital electronics. In addition, radio and television are considered as communications electronics. They all are basedon the fundametal laws of electricity and magnetism. Magnetic effects are always associated with an electric current.

The name electronics comes from the electron, which is very small, invisible quantity of electricity present in all materials. In terms of its many uses, electronics can be defined to include all aplications involving the control of electricity in a vacuum, such as vacuum tubes, in gas or vapor, and in the solid semiconductor materials used for transistor and integrated circuits. The main in their operation is control of individual electrons for desired effect.In a transistor, as an example, tthe input can control a larger output current, to provide amplification. The Integrated-Circuit (IC) contains many transistor on a small semiconductor chip.

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Resistor

Basically, all the materials have resistif but some materials such as copper, silver, gold and metal materials in general have a very small resistansi. The material is to dispatch electric current well, so named conductor. Reverse of conductive material, such as the material of rubber, glass, carbon resistansi have a greater flow of electrons and is called as the insulator. How conduction principle, described in the article about the semiconductor.

Resistor is the basic electronic components used to limit the amount of cash that flows in a series. In accordance with his name and resistif resistor are generally made of carbon materials. Ohms of the law known, resistansi inverted proportionate to the number of current that flows through. Resistansi of a unit called Ohm resistor or symbol is represented with W (Omega).

Resistor type that is common tubular copper with two feet on the left and right. In the body there is a circle shape bracelet color code to make it easier to identify the large size of the measure without resistansi with Ohmmeter. Color code is the standard issued by the manufacturer EIA (Electronic Industries Association) as shown in the table below. Time author entry registration study electrical engineering, there was a test that must be fulfilled that is required is not color-blind.

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Components of Electronic

There are two kinds of Component in electronic:

1. Passive components are those that do not have gain or directionality. In the Electrical industry they are called Electrical elements or electrical components. They are such as : Terminal & Connectors, Switch, Resistors, Capasitors, Inductors, etc).
   
2. Active components are those that have gain or directionality, in contrast to passive components, which have neither. They include Semiconductors (Solid State Devices, Diodes, Transistors, Integrated Circuit - IC, Hybrid Circuit) and Thermionic Valves (Vacuum Tubes).

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Electronic Component

An electronic component is a basic electronic element usually packaged in a discrete form with two or more connecting leads or metallic pads. Components are intended to be connected together, usually by soldering to a printed circuit board>, to create an electronic circuit with a particular function (for example an amplifier, radio receiver, or oscillator). Components may be packaged singly (resistor, capacitor, transistor, diode etc.) or in more or less complex groups as integrated circuits (operational amplifier, resistor array, logic gate etc.)
(wikipedia.org)

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Definition of Electronics

Electronics is the study of the flow of charge through various materials and devices such as semiconductors, resistors, capasitors, inductors, nano-structures.

Although considered to be a theoretical branch of physics, the design and construction of electronic circuits to solve practical problems is an essential technique in the fields of electronic engineering and computer engineering. This science started around 1908 with the invention by Lee De Forest of the valve (triode). Before 1950 this science was called “Radio technics” because its principal application was the design and theory of radio transmitters and recievers.

The study of new semiconductor devices and surrounding technology is sometimes considered a branch of physics. This article focuses on engineering aspects of electronics.
(electro08.wordpress.com)

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Analog Signal

An analog signal uses some attribute of the medium to convey the signal's information. For example, an aneroid barometer uses angular position as the signal to convey pressure information. Electrical signals may represent information by changing their voltage, current, frequency, or total charge. Information is converted from some other physical form ( such as sound, light, temperature, pressure, position) to an electrical signal by a transducer.

The signals take any value from a given range, and each unique signal value represents different information. Any change in the signal is meaningful, and each level of the signal represents a different level of the phenomenon that it represents. For example, suppose the signal is being used to represent temperature, with one volt representing one degree Celsius. In such a system 10 volts would represent 10 degrees, and 10.1 volts would represent 10.1 degrees.

Another method of conveying an analog signal is to use modulation. In this, some base carrier signal has one of its properties altered: amplitude modulation (AM) involves altering the amplitude of a sinusoidal voltage waveform by the source information, frequency modulation (FM) changes the frequency. Other techniques, such as changing the phase of the carrier signal are also used.<

In an analog sound recording, the variation in pressure of a sound striking a microphone creates a corresponding variation in the current passing through it or voltage across it. An increase in the volume of the sound causes the fluctuation of the current or voltage to increase proportionally while keeping the same waveform or shape.

Mechanical, pneumatic, hydraulic and other systems may also use analog signals. (wikipedia.org)

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Analog Electronics

What is Analog Electronics??
Analog electronics (or analogue in British English) are those electronic systems with a continuously variable signal.The term "analogue" describes the proportional relationship between a signal and a voltage or current that represented the signal. (en.wikipedia.org)

Historically, analog electronics was used in large part because of the ease with which circuits could be implemented with analog devices. However, as signals have become more complex, and the ability to fabricate extremely complex digital circuits has increased, the disadvantages of analog electronics have increased in importance, while the importance of simplicity has declined.

In analog electronics, the signals to be manipulated take the form of continuous currents or voltages. The information in the signal is carried by the value of the current or voltage at a particular time t. Some examples of analog electronic signals are amplitude-modulated (AM) and frequency-modulated (FM) radio broadcast signals, thermocouple temperature data signals, and standard audio cassette recording signals. In each of these cases, analog electronic devices and circuits can be used to render the signals intelligible.

Commonly required manipulations include amplification, rectification, and conversion to a nonelectronic signal. Amplification is required when the strength of a signal of interest is not sufficient to perform the task that the signal is required to do. However, the amplification process suffers from the two primary disadvantages of analog electronics: (1) susceptibility to replication errors due to nonlinearities in the amplification process and (2) susceptibility to signal degradation due to the addition, during the amplification process, of noise originating from the analog devices composing the amplifier. These two disadvantages compete with the primary advantage of analog electronics, the ease of implementing any desired electronic signal manipulation.

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Rule of Page

This Blog was made to increase and to share all about electronics or electric engineering. Elctronics in life.
Technology involving the manipulation of voltages and electric currents through the use of various devices for the purpose of performing some useful action. This large field is generally divided into two primary areas, analog electronics and digital electronics.

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