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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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electronics
Electronics is the study of the flow of charge through various
materials and devices such as semiconductors, resistors, inductors, capacitors, nano-structures and vacuum tubes. 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. The study of new semiconductor devices and surrounding technology is sometimes considered a branch of physics. This article focuses on engineering aspects of electronics Electronic systems are used to perform a wide variety of tasks. The main uses of electronic circuits a The controlling and processing of data. The conversion to/from and distribution of electric power. Both these applications involve the creation and/or detection of electromagnetic fields and electric currents. While electrical energy had been used for some time prior to the late 19th century to transmit data over telegraph and telephone lines, development in electronics grew exponentially after the advent of radio. One way of looking at an electronic system is to divide it into 3 parts: Inputs – Electronic or mechanical sensors (or transducers). These devices take signals/information from external sources in the physical world (such as antennas or technology networks) and convert those signals/information into current/voltage or digital (high/low) signals within the system. Signal processors – These circuits serve to manipulate, interpret and transform inputted signals in order to make them useful for a desired application. Recently, complex signal processing has been accomplished with the use of Digital Signal Processors. Outputs – Actuators or other devices (such as transducers) that transform current/voltage signals back into useful physical form (e.g., by accomplishing a physical task such as rotating an electric motor). For example, a television set contains these 3 parts. The television's input transforms a broadcast signal (received by an antenna or fed in through a cable) into a current/voltage signal that can be used by the device. Signal processing circuits inside the television extract information from this signal that dictates brightness, colour and sound level. Output devices then convert this information back into physical form. A cathode ray tube transforms electronic signals into a visible image on the screen. Magnet-driven speakers convert signals into audible sound. http://www.bollywoodwallpaper1.blogspot.com |
#2
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electronics
In article
, sweet&soft wrote: For example, a television set contains these 3 parts. The television's input transforms a broadcast signal (received by an antenna or fed in through a cable) into a current/voltage signal that can be used by the device. Signal processing circuits inside the television extract information from this signal that dictates brightness, colour and sound level. Output devices then convert this information back into physical form. A cathode ray tube transforms electronic signals into a visible image on the screen. Crikey. Just when was this written? -- *I wish the buck stopped here. I could use a few. Dave Plowman London SW To e-mail, change noise into sound. |
#3
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electronics
On May 27, 10:42*am, "Dave Plowman (News)"
wrote: In article , * *sweet&soft wrote: For example, a television set contains these 3 parts. The television's input transforms a broadcast signal (received by an antenna or fed in through a cable) into a current/voltage signal that can be used by the device. Signal processing circuits inside the television extract information from this signal that dictates brightness, colour and sound level. Output devices then convert this information back into physical form. A cathode ray tube transforms electronic signals into a visible image on the screen. Crikey. Just when was this written? -- *I wish the buck stopped here. *I could use a few. * * Dave Plowman * * * * * * * * London SW * * * * * * * * * To e-mail, change noise into sound. The idiot obviously has more time on his hands than sense. |
#5
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electronics
Actually, this short essay could be reduced to one sentence:
"Electronics is the generation and manipulation/control of electrical information." That's about it. |
#6
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SPAM (was: electronics)
sweet&soft wrote:
For example, a television set contains these 3 parts.[...] A cathode ray tube transforms electronic signals into a[...] Dave Plowman (News) wrote: Crikey. Just when was this written? Doesn't matter. It's just chaff. He just finds any crap, anywhere and does a cut&paste job. The *payload* is obviously the spam link for his site. http://groups.google.com/groups/sear...8BFg&scoring=d |
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