Category Archives: Blog

Electronic Devices Recycling

Society’s technological advancements have grown significantly over the years. Electronics devices such as telephones, cell phones, radios, CD and DVD players, televisions, and computers are products that are used in every household. These items are just a few of the many electronic devices that can cause serious environmental damage due to their toxic components. Electronics that are in need of disposal are referred to as e-waste, or electronic waste. Because of the advancement of electronic products, there has been a growing concern about the hazards of electronic waste. Some of these concerns include: improper disposal of toxic materials, health and safety concerns for people disposing of these items, as well as dangers to the soil and water supply. For instance, electronics are made using a considerable amount of toxic substances such as lead, cadmium, aluminum, zinc, copper, and plastics which can all leak poisonous material in the ground and water. These environmental concerns have resulted in the establishment of electronic recycling facilities and industries who take old electronics such as computers for the purpose of recycling and safe disposal.

Electronics containing materials such as metals, plastic, are valuable to the recycling companies. Disposing of electronics through a recycling company will result in fewer electronic devices going into landfills and lower carbon emissions.

Recovering Raw Materials: Recycling electronics involves recovering raw materials from the electronic equipment. Materials such as steel, copper, wires, aluminum, brass, plastics, glass,etc., are extracted and sold to smelters so they can create raw materials. Depending on the type of metal being extracted, they can be processed and used in products required by such businesses as the steel, construction and cement industry. Plastics and wood can be used as fuel to provide heat to industrial furnaces which converts to steam. Metals such as copper are sold to metal refineries.

Plastics: Plastics from such items as computers, computer mice, and keyboards, are sent through shredding processes and machine sorted. They are then sent to other recyclers for further processing.

Larger Electronics: Items such as televisions and computer monitors are dismantled by hand. The leaded glass cathode ray tubes are removed and disposed of safely. Plastics, copper, and circuit boards are removed, separated, and processed.

Hazardous Items: Toxic items are removed from electronic devices and disposed of safely. Toxic substance can include leaded glass, rechargeable batteries, non-rechargeable batteries (i.e.alkaline, lead acid, cell batteries) mercury in lamps and switches, parts containing polychlorinated biphenyls, as well as ink and toner cartridges. The remaining non toxic materials are processed and the recyclable materials are recovered. The materials are shredded and separated according to type. For instance, they can be divided into such materials as steel, copper, aluminum, and plastic.

Refurbished Electronics: There are now many companies that acquire used computers, repair and update them, and resell them at a much lower price. This is a great way to keep electronics out of landfills and make technology more affordable.

Donate Your Computer: If you are getting rid of your old computer because of a recent upgrade, consider donating it to charity. Many schools and non profit organisations are in need of computers. There are companies and businesses that will take your computer, refurbish it, and donate it to a needy cause. Make sure your computer is wiped clean of all information before donating it. Donating your computer helps the community and the environment.

We are fast becoming a technology dependent society. When it comes to protecting and conserving our environment, we have to adapt and change our technological practices to ensure a sustainable future. Recycling electronics is a great way help the planet.
Source by Amy Nutt

Emerging technologies in electrical drives and power distribution system in future aircrafts

Emerging technologies in electrical drives and power distribution system in future aircrafts

                       u.sureshkumar*

*  professor in EEE department

Mohamed sathak enginnering college

Kilakkarai

E mail :uskrk@sify.com

Abstract:

It is projected that in future aircraft, all power, except propulsion, will be distributed and processed electrically. In other words, electrical power will be utilized for driving aircraft subsystems currently powered by hydraulic, pneumatic or mechanical means including utility and flight control actuation, environmental control system, lubrication and fuel pumps, and numerous other utility functions. These concepts are embraced by what is known as the “More Electric Aircraft (MEA)” initiative. The MEA emphasizes the utilization of electrical power as opposed to hydraulic, pneumatic, and mechanical power for optimizing aircraft performance and life cycle cost. It would eliminate the need for gearboxes and transmissions since the power transmission is through electrical rather than mechanical means, which reduces the weight of the aircraft and increases the fuel efficiency. Detailed analysis of

interaction between an Electro Mechanical Actuator (EMA) connected to the DC bus of the power distribution system in a next generation transport aircraft with the bus regulator is presented. Development of reliable power-by-wire actuation systems for both aeronautical and space applications has been sought recently to eliminate hydraulic systems from aircraft. Aircraft

engineers have tested electrohydrostatic actuators (EHAs), which combine electrical and hydraulic power, hence the

evolutionary “more electric aircraft” idea. Efforts are being made to replace

all the hydraulic systems with electrical systems, which will lead to a new technology called “All Electric Aircraft”.

Introduction:

Flight Control System

A flight control system consists of the flight control surfaces, the respective cockpit controls, connecting linkage, and necessary operating mechanism to cont4rol aircraft in flight.

Classification

Flight control systems (FCS) are classified as follows:

  • Mechanical FCS
  • Hydro mechanical FCS (powered flight control units (PFCU))
  • Fly-by-wire FCS

Mechanical FCS:

The mechanical FCS is the most basic designs. They were used in early aircraft and currently in small aeroplanes where the aerodynamic forces are not excessive. The FCS uses a collection of mechanical parts such as rods, cables, pulleys and sometimes chains to transmit the forces of the cockpit controls to the control surfaces.

Hydro mechanical FCS (powered flight control units (PFCU)):

The complexity and weight of a mechanical FCS increases considerably with size and performance of the airplane. Hydraulic power overcomes these limitations

A hydraulic FCS has 2 parts:

  • The mechanical circuit
  • The hydraulic circuit

The mechanical circuit links the cockpit controls with the hydraulic circuits. Like the mechanical FCS, it is made of rods, cables, pulleys, and sometimes chains. The hydraulic circuit has hydraulic pumps, pipes, valves and actuators. The hydraulic pressure generated by the pumps in the hydraulic circuit powers the actuators. The actuators convert hydraulic pressure into control surface movements. The servo valves control the movement of the actuators. The above two-control system has a major drawback that it contains heavy mechanical circuitry, which increases the weight of the system. To overcome this drawback a new technology “MORE ELECTRIC TECHNOLOGY IN AIRCRAFT” was developed. The aircraft in which this technology was used was called “MORE ELECTRIC AIRCRAFT”(MEA).

When describing the MEA, flight control actuation systems can be considered to involve two main technological areas: fly-by-wire (FBW) and power-by-wire (PBW). FBW technology comprises the design, development and implementation of electronics for flight control systems. Electronic control provides flight control and actuator control functionality implemented using either centralized or distributed architectures. Distributed control systems reduce the processing load on centralized flight control computers, and offer more flexibility during system architecture development. A further benefit is the reduction in weight achieved by reducing harness size and component quantity. In recent years, technological advancement has centered on the FBW field, to the extent that FBW control systems are now the standard in today’s commercial and military aircraft. Power-by-wire (PBW) actuation is the next major breakthrough in aircraft control. Just as the fly-by-wire flight control system eliminated the need for mechanical interfaces, power-by-wire actuators eliminate the need for central hydraulic systems. Control power comes directly from the aircraft electrical system. This has several advantages. Central hydraulic systems are complicated and difficult to maintain. Removing these systems would greatly reduce the amount of support equipment and personnel required to maintain and operate current air and space vehicles. In addition, PBW actuators have the potential to be more efficient than their hydraulic counterparts. A central hydraulic system must generate and sustain significant hydraulic pressure (3,000 to 6,000 pounds per square inch) at all times, regardless of demand. PBW actuators only use electrical power when needed. Finally, PBW actuation systems can be made far more fault tolerant than those depending on a central hydraulic supply. Once a hydraulic line is compromised, it usually leads to the loss of that entire hydraulic circuit. As a result, multiple hydraulic circuits are required to maintain some level of redundancy. With a PBW system, a failed actuator can simply be switched off, isolating the problem to a single surface.

Types of PBW Actuators

There are several different types of PBW actuators, including electrohydrostatic actuators (EHA) and electromechanical actuators (EMA). EHAs use a reversible, electrically driven pumpmotor to directly pump self-contained hydraulic fluid to a piston. This drives the ram in the same fashion as a standard hydraulic actuator (Figure 1(a)). An EMA has no internal hydraulic fluid, instead using electric motors to directly drive the ram through a mechanical gearbox (Figure 1(b)). Compared to an EHA, the EMA has certain advantages. It is lighter, smaller, and less complex than an equivalent EHA because of the absence of an internal hydraulic system. Since there is no hydraulic fluid in the load path, the EMA tends to be stiffer than an equivalent EHA. The EMA tends to be more efficient because there are no windage losses or pump inefficiencies. Finally, since there is no leak potential with an EMA, it is better suited to long term storage or space applications.

Electromechanical Actuation (EMA)

An EMA uses mechanical gearing to couple an electric motor to a flight control surface. This is achieved using a rotary gearbox, and depending on the actuation method required, can include some form of rotary-to-linear conversion, such as a ball screw. Electric motors requiring a DC electrical supply are typically used, although the addition of a diode rectification stage will also allow them to operate from an AC electrical supply. Motor speed, direction, and torque translate directly to speed, direction, and load in the actuator. Figure 1 shows an EMA currently being developed by TRW for a high-power flight control application. In its basic form, the EMA is susceptible to certain single-point failures that can lead to a mechanical jam, and consequently presents complications for flight certification on certain surfaces. Additional devices can be used to mitigate against this failure mode, but in doing so, complexity, cost, and weight are increased. For these reasons, the basic EMA is not suited for primary flight control applications. However, spoiler systems and secondary actuation systems could accommodate EMA technology.

EMA system layout

Large EMA for High-Power flight controls

Baseline Power System Architecture

The proposed power distribution system is built around a 270V DC distribution bus. The typical baseline power system architecture for a next generation aircraft is shown in Fig. 1. It can be seen that the key components that control the power are the bidirectional power converters (BDCs). A bus regulator provides an interface between the starter/generator and the distribution bus. Most of the loads, including the actuators, are regulated using bidirectional power converters, which control and condition the power from the DC bus.

With the proliferation of bidirectional power converters and advanced actuators in the power distribution system, it is important to develop methods to analyze the interaction between the different subsystems. Due to the complexity of the baseline power system and the large number of subsystems, a sample power distribution system, which captures the essential features of the baseline system but is not as complicated, is introduced. The sample power system is represented as a interconnection of a source and load subsystem.

Sample Power Distribution System

The sample power distribution system is shown in Fig. 2. The source subsystem represented by subsystem 1 consists of an ideal three phase voltage source, a three-phase boost rectifier to provide the regulated 270V DC required by the DC bus. The load subsystem represented by Subsystem 2 is an electromechanical actuator used to control the secondary flight control surfaces on the aircraft. The other loads on the DC bus are modeled by a current source, or a simple resistance.

The EMA model shown in Fig. 5 is shown to include a DC motor with constant field, a ball screw transmission between the motor and the control surface, and a model of the surface dynamics. The motor voltage is controlled by a PWM bidirectional buck converter with an input filter. The EMA is controlled by a multi-loop controller, which includes a motor current, motor speed, and the ball screw position feedback loops.All of the other loads on the bus are modeled by a resistor or a current source.

Electro hydrostatic Actuation (EHA)

  1. In contrast to EMA, EHA (Figure 2) uses fluidic gearing between the electric motor and the surface actuator. Hydraulic fluid provides an intermediate means of transmitting power to the surface. Here, a variable-speed electric motor (typically DC) is used to drive a fixed-displacement hydraulic pump, which in turn, powers a conventional hydraulic piston jack. Change in direction is achieved by the use of a bi-directional motor. A major advantage to this approach is that the EHA operating mode can be managed like a conventional hydraulic actuator. This approach is achieved using standard hydraulic bypass or damping valves (Figure 3); thus traditional active-standby, or active-active, actuator configurations can be readily adopted. This capability makes the EHA more suitable for primary flight control applications than the EMA. Although EHA technology reintroduces hydraulic components and fluid, it is totally self-contained          within   the        actuator assembly. Compared to traditional hydraulic actuator systems, the inconvenience   of         hydraulic disconnection from aircraft supplies and the complications of bleeding the system during reinstallation are not encountered during     maintenance.

Electrohydrostatic Actuators (EHA)

Large EHA

EHA Control Schematic

Benefits of electrically powered Actuators:

The potential benefits of electric actuation at a system level have been well publicized.

Electric actuation can offer:

  • Improved aircraft maintainability:
  • Fewer hydraulic components are required,
  • Faster aircraft turnaround,
  • Fewer spares and tools are needed,
  • Improved fault-diagnosis through        built-in test (BIT).
    • Improved system availability and reliability:
    • Electrical distribution is more practical and offers system flexibility with respect to reconfiguration Ñ a capability previously difficult to achieve using hydraulics,
    • Improved mean-time-between-failures (MTBFs) through removal (electromechanical actuation or EMA) or on-demand usage   (electrohydrostatic actuation or EHA) of hydraulic components.
    • Improved flight safety Ñ in the MEA configuration, improved system safety is achieved through dissimilar actuator power supplies and subsequent avoidance of common mode failures.
    • Reduced system weight Ñ weight saving, achieved through the replacement of entire hydraulic systems, including pumps, distribution networks (pipes and fluid), and valve blocks, by electric systems.

The main benefit is the reduction of aircraft operating costs, for example, reduced fuel cost (as a result of reduced weight), and lower maintenance costs (quicker turnaround). However, before such benefits can be realized, additional work is required to improve the technology and provide the appropriate application platforms to introduce the technology into service.

Furthermore, the aircraft maintenance industry must realign its infrastructure so that it can reap the benefits of electric technologies.

Some additional benefits of both EMA and EHA actuators are:

  • Low quiescent power consumption during standby operation,
  • Rapid start-up response,
  • Can be easily adapted for use with AC or DC electric supplies,
  • Insensitive to supply frequency variation of AC electric supplies.

EHA versus EMA?

An alternative to EHAs, are ‘electromechanical actuators’ (EMAs), in which the motor torque is mechanically amplified and transmitted to the control surface using a gear set, screw or other mechanical transmission device, can be seen as an alternative. Indeed, as far as complexity, weight, reliability and maintenance requirement are concerned, EMAs are potentially more attractive than EHAs, at least for low power applications. In particular, all hydraulic technology relevant problems are obviously eliminated from the EHA configuration. However, in the three following areas EHAs are still preferable to EMAs:

?The jamming probability of an EMA used in a primary flight control application is difficult to predict and substantiate from existing in-service experience. Jamming probability of an EHA, can be directly assessed from the current servo control experience, and shown as ‘extremely improbable’ if properly bypassed. In contrast, the jamming probability of mechanical systems incorporating hundreds of gear teeth and screw mechanisms is questionable and present-day experience in secondary flight control applications may not be directly transferable to primary flight controls, due to very different duty cycles in particular

Wear of the mechanical transmissions components may result in control surface ‘free-play’ or other non-linearities, which may generate unacceptable limit cycles

?The introduction of an EHA in parallel with regular servo control in the basic more-electric architecture described above is easier than an EMA. EHAs can easily be made reversible in standby mode, they can incorporate identical damping devices to those currently used for flutter protection, and they can be built with many components common with the adjacent servo control such as the piston, cylinder, associated position transducer or the accumulator. In an obvious move to spread the technical as well as financial risk, Airbus has called on the talents of several companies for the design, production and supply of the many actuators on this mammoth aircraft. Specifically, the A380 aileron and elevator EHAs, as well as rudder EBHAs are purchased from Goodrich, while Messier-Bugatti will supply the associated EHA pumps. Meanwhile, the spoiler EBHAs are from Liebherr, which supplies its own pumps. Phil Hudson, Goodrich VP engineering for actuation systems notes: “The electronic EHA concept can also be designed to serve more functions than simply motor control. It can serve as a smart actuator controller in its own right and be part of a distributed control system or to control a set of multiple actuators. Another benefit is that this distributed technology puts intelligence local to the actuation elements in a control system and can substantially reduce harness weight and improve fault detection and isolation.”

Maintenance benefits are also substantial. Power-by-wire EHA actuation units are line-removable with only mechanical and electrical connections to the aircraft, which eliminates the need to refill or bleed systems of hydraulic fluids as is required with central hydraulics. Since power-by-wire actuators are self contained and remotely located at the surfaces, the area exposed to damage is greatly reduced. Additionally, power-by-wire actuators can be designed as position sensitive, which means that the actuators provide only the flow and pressure necessary to move and hold the actuator in a desired

position. Conventional central-hydraulic systems are configured to produce continuous pressure. Flow is metered at each actuator, which can lead to a large consumption of power and generate unwanted heat. William Schley, R&D supervisor, Parker Aerospace, Controls Systems Division explains that EHAs only consume power on demand.  Specifically, they consume power in proportion to the power delivered to the load. In contrast, a conventional EVSV-equipped hydraulic servoactuator consumes power in proportion to output speed, allocating power to output load as needed, with the remainder of the power being dissipated through pressure drop (heat) across the main control valve. Whilst hydraulic actuators become more efficient the more they are loaded, loads are typically low during most of a flight.” Another important advantage of electric actuators is survivability. Ballistic or explosive damage to an electric power distribution system or actuator usually does not cause loss of function of that entire channel, particularly if the damage is peripheral. In a hydraulic system, depending on its design, even a small leak can cause a major loss of function and/or fire. Although some electric actuators contain

hydraulic fluid, the system as a whole is still usually more survivable. For now, these more advanced failure management functions are being provided by the EHA and its variants. EHA combines the best of electric actuation and conventional hydraulics for a hybrid design approach, which is more fault tolerant than most current EMAs. Moreover, EHAs are mechanically simple, and immune to gear train jams. The typical long-term storage capability for EHA is 10 years plus.

Next-Generation—All-Electric Aircraft:

The “All-Electric” aircraft is a concept that emerged in the 1970s and has engendered a large amount of research activity. An all-electric engine, which could replace current aero gas turbines, would drive all accessories electrically, via a distribution network, from motor/generators embedded in the engine spools. Extending the function of the motor/generators to include service as active magnetic bearings would facilitate deletion of the oil system. The all-electric concept thus offers a huge scope for both engine and airframe reconfiguration and operational improvements, with studies indicating benefits of overall weight reduction, increased reliability, easier maintainability, reduced operating costs (including reduced fuel burn), and enhanced safety.

Conclusion:

Beginning with the scenario of a single hydraulic power supply replaced by an electric one, it is possible to establish the relativity and scale for the changes required in the migration toward the “All-Electric” aircraft concept. On a small civil airliner, typically a minimum of five electric actuators would be needed to provide one lane of electrical control for the primary flight control surfaces. If all hydraulic systems were converted to electric, in excess of 20 electric actuators would be needed to provide complete control of all primary and secondary flight control surfaces. The consequential increase in electrical power demand has major implications for electrical power generation and distribution systems. Thus, a significant amount of work is still needed to address the consequences of distributing many electrical actuators around an aircraft, and the consequential start-up, steady state, and peak demands required of aircraft electrical power supplies.

It is clear that the migration to electric actuation systems is affecting both civil and military markets. As described previously, the replacement of a single hydraulic system by an electric substitute is a major step in the transition to all-electric technologies. It is quite evident that the demands being made on aircraft generators and distribution architectures will increase considerably to meet the needs of this migration. A company named TRW has already developed products to meet the current demands envisioned by PBW and has programs to ensure that it will meet any future demands required by the all-electric aircraft. Finally, it is envisioned that once in service, electric actuator technology and electrical system architectures will improve the commercial viability and in-service reliability of the airframes to which they are fitted. These improvements will undoubtedly drive the adoption of greater levels of electric actuation on future aircraft.

References:

  • Weimer J. A, “Power management and distribution for the More Electric Aircraft”, Proceedings of the30thIntersocietyEnergyConversion Engineering Conference, vol. 1, July 1995, pp. 273-277
  • Technology Review Journal — Millennium Issue • Fall/Winter 2000
  • ACTUATOR DEVELOPMENT OVERVIEW

D. Tesar, UT Austin, Robotics Research Group April 1, 2006
Source by u.suresh kumar

Electronic Products Change Your Life for the Better

The uses of electronic products have catapulted since the past few decades. There has been a tremendous growth in science and technology that has led to new inventions of different types of gadgets and electronic products.

Popular Gadgets with Highly Advanced Features

Electronic products play a significant role in our day to day lives. It helps to make us lives comfortable and easier. Some of the most commonly used gadgets include televisions, washing machines, refrigerators, air conditioners, heaters and so forth.

With each new day, brand new electronic products with advanced technological features are launched in the market. A variety of DVDs, Camcorders, Digital cameras, LCDs, computers, mobile phones and Laptops are designed each and every moment. Every single product has immense importance in our lives which is quite undeniable.

The use of mobile phones and microphone systems has simplified communication process to a great extend. Conference microphone systems are used in meetings and discussions to send the speaker’s voice to a large group of people present in meetings. This gadget is inbuilt with many amazing features and its use is highly beneficial in the business world.

Camcorders are among the most popular electronic products which are used to capture beautiful videos. The earlier methods of Videography using video cameras have become obsolete. The use of VCDs and DVDs has gained significance and popularity these days.

MP3 and MP4 players: The MP3 and MP4 players have taken music to new heights. Now you can carry your music anywhere you go. With the growth of technology, new features were added to the existing players. Better storage capacity, improved sound features, sleek designs, vibrant colors and better battery backup.

Digital cameras: Gone are the days when wooden cameras were used to take pictures. Digital cameras with advanced features have hit the markets today.

Mobile phones: the mobile phones are no longer just gadgets to communicate with friends and family. You can access your email, surf the internet and chat with your friends through mobile phones. You can also take pictures and send them through MMS. Mobile phones have become multifaceted gadgets with a number of high tech features.

Music systems: A range of music systems from top notch companies like Philips, Boss, Sony and so forth has created waves in the market. Mini speakers, home theatres and CD players have captivated the hearts of a million music lovers.

Best Electronic Products Online

You can buy electrical goods from a number of online stores and other wholesale distributors. Some of the best branded companies like Sony, Philips, Panasonic, LG, Toshiba and so forth are listed in the online directories. You can easily find branded companies and a variety of top quality electronic products in these online stores.

Online shopping has become the order of the day with a number of companies resorting to online sales of products and services. By shopping online, you can compare the features and prices of multiple products and buy the best among them. Most of the electronic products are offered at discounted rates and with special offers in the online stores.
Source by Vaiv Jais

Unique Electronic Products: Digital Pens

Until a few years back, who would have imagined that your regular pen would take on so many different dimensions? Today, a pen in addition to being a writing instrument is so much more. Digital pens have become increasingly popular today; probably, due to the multiple benefits it offers.

So, what is a digital pen? A digital pen is an electronic pen that is used as a normal writing tool, as well as for writing on special digital paper it can save handwritten text to memory. This can later be transferred to a PC. There are a number of variations to the digital pen. These pens come with several different features and are compatible with different computer operating systems. There are a number of voice recorder pens that are available that are USB powered and enable you to record audio.

Start with a plan: Shopping for electronics can be like shopping for other stuff. It`s very easy to get carried away. If you know that you will likely start shopping beyond your comfortable price range, make sure that you set a budget amount before you hit the sites and then stick to it.

Benefits: There are many benefits to using a digital pen. For companies that deal with a lot of paperwork such as contracts and agreements, forms a digital pen can prove to be extremely beneficial. You can store a handwritten signature on the pen which can then be transferred to digital forms.

Record keeping is made much easier thanks to these pens and it cuts down the need for interdepartmental paper sharing, as employees can store and update their files easily. In addition, the ‘green, eco-friendly’ benefit is immediately evident as it cuts down on the need for paper.

Such digital pens also save us a lot of time, and help deliver quick, efficient service to our customers. In addition, these pens can also double up a mouse, thus allowing us to navigate through our computers easily and efficiently.

People are often under the false notion that digital pens are complicated pieces of equipment. This couldn’t be farther from the truth. Digital pens come with software drivers that need to be installed on your computer. Installation is extremely simple and does not require any in-depth knowledge. The user guide is more than sufficient and will provide you with all the information you need.

Finding the right electronics, not just the common, run of the mill variety, can be very difficult if you do not know where to start your search. So, spend some time in finding the right place to shop for the right products.
Source by Subbu Rethiman

The Value of Electronics in Modern Life

Whether they help us find the quickest itinerary to the movie theater or let us enjoy a high-definition cinema on a Saturday sunset, electronics have earned a paramount function in humans’ lives and in present civilization. How else would we stay in connection with our loved ones? Could businesses function in today’s earth without computers? Silly to say, high-tech devices are critical to our communal and professional well-being and continue to grow in distinction with each passing second.

Electronic wholesalers ship a immense selection of useful accessories to retailers, where hungry purchasers can pick them off the shelves. But how would a yoke of newlyweds who just bought a house in provincial Kansas detect the most close at hand electronics store? A GPS or directions freshly printed from a travel website resolves the problem with ease. How would parents settle down impatient children on a five-hour outing to Grandma’s without portable music devices or handheld gaming consoles? It is a mystifying problem that boils down to our very convention. Luckily, the realm of <a rel=”nofollow” onclick=”javascript:ga(‘send’, ‘pageview’, ‘/outgoing/article_exit_link/1024681’);” href=”http://www.dhgate.com/wholesale+electronics.html”>wholesale electronics</a> provides people from almost every corner of the earth with access to such productivity-boosting and stress-easing gadgets as desktop and portable computers, MP3 players, high-definition HDTVs, gaming consoles, cell phones and navigation devices.

However, just as a coin has two sides, electronics have their detriments as well. Television and computer screens emit large masses of unhealthy radiation. Mobile phones and portable gaming devices make it easier than ever for youngsters and adults alike to lose concentration in the classroom and at work. Gaming and internet addictions keep many capable individuals pinned to their seats and out of a job. While electronics have the potential to be conducive in people’s lives, it is up to the people themselves to utilize them in a positive mode. High-tech widgets are meant to help move our lives onward, not hold us back.

Most would argue that the upsides of electronics far negate the detriments. The most latest gadgets have made and will continue to make remarkable progress, particularly in the spheres of business and education. Online studying enables people from many geographic locations, ethnic and economic backgrounds, and personal lifestyles to further their scope of knowledge and, consequently, their standing in life. Earning an online degree can also save thousands of dollars and ease the trouble of debt. New advances in communication technologies allow businesses to organize and watch branches all over the planet from any location, drastically augmenting their customer base and shrinking the need for pricey travel. Electronic wholesalers and retailers can subsequently make their presence famous worldwide. As a result, buyers receive access to a wider collection of products from a number of international businesses, not just those stationed in their home country.

Electronics have without a doubt revolutionized our social and professional lives and redefined our very way of life. The immense collection of gadgets offered by electronic wholesalers and retailers help boost the productivity of individuals and businesses alike. High-definition televisions, portable music players and gaming consoles have added a whole new dimension to entertainment and leisure. laptops and mobile devices allow people to pursue an education from any site and stay in acquaintance with friends and family. Like anything else, technology provides us with the potential to reach great feats, but it is up to us to utilize it intelligently.
Source by davidzou

The Effect of Electronic Appliances in our Lives

The use of electronics devices in daily life has become the fuel of human life.  It has made the human life more luxurious. The use of electronics has been saving the human energy as well as the time. It has helped making the world a global village. With the invent of mobile phones, people are accessible to their family, friends, clients and to the world anywhere and anytime.

The use of electronic devices is growing day by day. The use of electronic devices is very common at home, in schools and at work.

Nearly all the working places and living places have computers, television, radio, telephone, mobile phone, fax, air conditions, camera etc. There are so many positive effects of the use of the electronic products. Let us look at the important areas, where electronics has brought positive changes:

1. Many crucial processes are made easy with the use of electronics. The machines are now taking the place of humans. The robots can perform all the difficult tasks with its powerful batteries.

2. Electronics has simplified many difficult tasks in the industry and household work. The electronic devices are taking care of difficult, routine and time consuming industrial and household work.

3. Earlier the mode of transportation was changed from the bullock carts to mechanical motors and now these vehicles are equipping themselves with different electronic devices and making the transport system better, accident proof, environment friendly. Use of GPS system in the cars has altogether changed with way they were driven. In the coming days, use of hybrid cars is bound to increase.

4. There is no need to mention that how the invention of computers changed the face of the world. Computers can store huge amount of data and information. The internet has become the largest and the most effective communication platform. Nobody can think of this world minus computers and internet.

5. The information can reach to people within seconds over the internet.

6. Digital cameras and digital televisions helped us to experience the live show and improved the quality of pictures.

7. Mobile phones have broadened the horizons of communication. Today, no one can imagine life without mobile phone.

8. Satellite TV’s and satellite radios enables the broadcasting of all the important events across the globe.

9. There are so many fields where the uses of electronics have made the life easier than before be it medicine, corporate world, aviation, education, entertainment etc. It has made an impact on all the sectors.

There are many electronic e-shops from where one can buy electronic devices. People don’t hesitate to spend on these appliances because these electronic products are providing the best value of money.

Source by Lee

The Best Way to Sell Used Electronics

The majority of us have used electronics laying around the house somewhere, sitting on a shelf, or stuffed in the back of the drawer – either way they are gathering dust and it is possibly only a matter of time before they end up in a landfill. I would like to offer some advice to prevent this from happening and provide you an option to benefit with cash with the ability to sell your used electronics. When you stop to think for a moment, you can sell your used electronics, which in theory is the same as recycling them – except with the process of selling any used electronics you benefit as well as the planet and environment, a win / win situation for all.

And to encourage you further the method to sell your used electronics can be, and generally is a simple, and fast transaction – nowadays you have the ability to do this online, from the comfort of your own home you can sell your used electronics and get paid cash – select the right site to trade with and you will only gain when you sell, as there won´t be a cent to be paid out by you. If you were to sell offline to a high street store you would have to pay for the fuel or bus journey to get there, then possibly parking fees, and if you choose the wrong site to trade online with you have shipping and insurance costs to pay – all this defeats the objective of you selling your used electronics by eating into your profit before you have even made the transaction.

This doesn´t have to be a concern for you anymore when you want to sell your used electronics online, there is now sites available that will cover all your expenses, leaving you to only profit from selling your used electronics to them, and another benefit being that you can sell your used electronics in any condition – even broken. Now it´s getting difficult for you to say that the option is not practical for you, this really is a process that can be used by us all, and for all the used electronics we sell it reduces the landfill e-waste figures, so together we can make a difference to the environment selling one used electronic at a time.

Another great factor is that when you sell your used electronics online the benefits don´t stop there, all the electronics undergo a full or part refurbishment and go on to live again and help those less fortunate then us. So you can sell your electronics, you benefit, the environment and future generations benefit and those less fortunate benefit, this with the other factors we have mentioned should surely be enough to urge you to visit sites such as www.cash4laptops.com and www.cashforsmartphones.com and see how you can start the benefit process of selling your used electronics from the comfort of your armchair.

Source by Mark Grey