Consumer Electronics Items
The daily utilization of electronic tools are referred to as consumer consumer electronics and consists of TV, telephone, DVD, CD, PC, laptop etc
. These gadgets are produced all over the world. With the development in electronic engineering at a steady pace, a number of new assortment consumer electronics items overflow into the marketplace each and every year and the price the existing products decreases consistently and it's 1 from the greatest advantage of consumer electronics industry.
Electronic waste is one from the problems associated with these electronic item and many manufacturers are now planning to deal with these waste.
Semiconductor:
All electronic devices use semiconductors and with out these semiconductors none of the digital device is complete. Semiconductor acts like an insulator at absolute zero (-273 degree centigrade) and could be distinguished from conductor that at this temperature the outermost filled electron energy band is totally filled in a semiconductor compared to the conductor in which the band is partially filled.
At room temperature semiconductor shows a very small electrical conductivity much lesser than that of conductor.
Doping in semiconductor:
Most common semiconductors used for electronic devices are silicon and germanium. Even though some other conductors such as iridium phosphide, gallium arsenide and mercury cadmium telluride are also utilized.
A pure semiconductor also referred to as intrinsic semiconductor, when doped with electron rich element e.g. arsenic or electron deficient element e.g. boron in extremely small quantity, its conductivity heightens and also the resultant conductor is known as extrinsic conductor. My doping arsenic (electron rich) and boron (electron deficient) in silicon, we get n-type (negative type) and p-type (positive type) semiconductor products.
We might create a p-n junction by doping various element in various region of semiconductor and also the gadget is known as diode. Similarly we can create p-n-p or n-p-n junctions and the device is known as triodes.
Digital Devices
(a)Television: It's a device by which we can obtain moving pictures and sounds more than a distance. The whole transmission and receiver systems require the following inputs. 1.Camera for live images or flying spot scanner for transmission of films and sound source.
2.Transmitters for transmitting both images and seems.
3.Receiver systems for receiving these signals.
4.Display device, which is either CRT, Rear projection, LCD or plasma. To display the signal within the forms of images and seems.
(b)Telephone:
It is the device for communicating by which two persons can send and obtain sound signals more than a distance. The system requires the following inputs.
1.The telephone equipment, which converts sound signals to electrical signals and electrical signals to sound signals.
2.Central exchange from where the subscribers are interconnected.
3.Wiring for connecting all the subscribers.
(c)Calculators:
It's a gadget used for carry out various mathematical calculations. The input required for calculator are as given below.
1.Power source (battery or solar panel)
2.Show device (LED or LCD)
3.Keypad that contains all functions and numbers.
4.All electronic circuit products.
Digital Waste materials:
These are the waste materials electronic devices and if properly utilized may be valuable secondary raw material source for numerous electronic equipments and if thrown out might act as toxic because of presence of various toxic materials including lead, mercury, cadmium, arsenic etc. uncontrolled burning of these materials might also cause environmental problems.
Electronic waste is occasionally illegally sent to other countries for processing. Nevertheless, due to complexity and difficulties in recycling, e-waste will remain an issue for the coming days.
by:Jake Sommerfield
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