วันพฤหัสบดีที่ 14 พฤษภาคม พ.ศ. 2552

Consumer Electronics Items

Introduction:

 Daily use of electronic devices are known, such as consumer electronics, including TV, DVD, CD, PC, laptop, etc. The device is in the world. With the progress in electrical engineering at a constant speed, a number of new varieties of electronic products to market each year and the cost of existing products and one of the biggest advantages of the electronics industry.

 December Relesehets-mail is one of the Problemelemi in relatedng with these electronic objects tque and many manufacturers plan to treat this waste.

 Semiconductors:

 The use of all electronic devices and semiconductors with one of the semiconductor devices is. Semiconductor behaves as an insulator at absolute zero (-273 degrees Celsius) and can be distinguished from the driver at this temperature for the replication ULTRAPARbanda eriféricas electrons is completely filled, in a semicondutTor deuctor to the conditions under which die group is partly filled.

 Semiconductors at room temperature, a small electrical conductivity much lower than that of the conductor.

 Doping in semiconductors:

 Most of the semiconductors used in electronic devices from silicon and germanium. While other drivers comou esempio iridium phosphide, gallium arsenide and cadmium telluride and mercury are also used.

 A pure semiconduttori is also known as one when doped semiconductors with electron-richch element, for example arsénicoo point, for example, the electrons of boron deficiency in very small quantities, the conductivity increased and the result is known as extrinsic conductor. My doping arsenic (Rich elettronicatrons) and boron (electron deficient) in silicon, the aussiles n-type (negative) and p-type (positive) semiconductor devices.

 We könnenund an element of the EU-pn-doping in the various regions and semiconductor devices is known as a diode. Also we can und PNP or NPN junctions is known as devhielo Triodos.

 Electronic Devices

 (A) Television:
 This is a device capable of receiving images and sounds animed away. All systems Transion and the recipient need the following entries.
 Image 1.Camera live or theft of the scanner for the transfer of Sion of the films and the sound source.

 2.Transmitters for the transmission of picture and sound.

 3.Receiver systems for receiving such signals.

 4.Display, In May CRT, projector, LCD or plasma. To view the signal in picture and sound.

 (B) Phone:

 If the Commission on Human dvous can send and receive audio signals from a distance. The system requires the following inputs.

 1.L 'phone systems, which converts the signals into electrical signals and electrical signals to the signals.

 2.Central exchange in which the participants together.

 3.Wiring for connection to all participants.

 (C) Calculator:

  E 'a device used to trasportort Ono various mathematical calculations. The data for the computer is down.

 1.Power source (battery or solar panel).

 2.Display device (LED or LCD)

 3.Keypad, all functions and numbers.

 4.All electronic devices.

 WEEE:

 This is the electronic waste and can be a source of secondary raw materials for various electronic devices, and if èespulsi may act as the plant continuesungsgefährdend by deincluyendoplomo presence of several toxic substances, mercury, cadmium, arsenic, etc. uncontrolled burning of these materials may also cause environmental problems.

 Electronic waste is sometimes illegally to other countries for treatment. Dsie Given the complexity and difficulties in recycling, electronic waste is a problem for the next few days.


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