Category Archives: electronics

The Miracle Of The Cordless Phone

If the cordless telephone is not a miracle then what is? One can move about with it all over the house without breaking the conversation or getting entangled in wires. Cordless phones have the basic features of the normal telephone and there are many models available.

Basically the cordless phone is an amalgam of the telephone and the radio (transmitter as well as receiver). The cordless phone comprises of two things – the base and the handset. The base is attached to the main phone connection with the help of a jack. It accepts the calls coming in through the line of the phone and then converts it into a FM radio signal. After having done so, it transmits that signal.

The handset gets this radio message from the base and changes it to an electric signal. The latter is then converted to sound and eureka! One can hear! While talking, the handset sends the voice through a second FM radio signal back to the base. The latter receives it, changes it to an electrical signal and then transmits the signal through the lines to the other person at the other end of the line. Thus the base and the handset work on a pair of frequencies that allow for talking and listening at the same time. It is technically known as duplex frequency.

Cordless phones made its first entry in 1980 but their range was limited, sound quality was poor because walls and other objects acted as obstructions. There was little security as the signals could easily be intercepted. In 1986 with the granting of a higher frequency range by the relevant authorities the interference problem of the cordless phones decreased and the amount of power required to run these also lessened. But nevertheless the range was limited and the sound quality remained poor. With the further increase of frequency to 900 MHz in 1990 the sound reception improved, became clearer and longer distances came to be covered with a choice of channels. But the price remained beyond the reach of the common man.

In 1994 digital phones came to be introduced. It made conversations less exposed to eavesdropping. In the following year further advancement in technology in the form of digital spread spectrum was introduced in cordless phones and in this way the march of technology continued to make the cordless phone into a marvel and miracle with greater range, security and clarity of sound.

The cordless phone being a combination of the ordinary telephone and the radio has certain distinctive features that the general phone does not have. It relates to range, sound quality and security. By range is meant the distance that the handset is kept away from the base. This range can affect the quality of the sound being obstructed by walls and other like items.

Security is a big problem because the radio signals from both the handset and the receiver travel across open air paths where they can be easily picked up by other instruments like similar cordless phones, radio scanners or baby monitors.

Connected with the performance of the cordless phones are radio frequency, analog in comparison with digital technology and the number of the channels. The cordless phones works on many radio frequencies. Analog technology is mostly used in cordless phones in the cheaper models. It is more noisy and less secure. The sophisticated latest models use digital technology. All cordless phones have rechargeable batteries.

The invasion of cell phones however has taken away much of the focus on cordless phones although it still retains its market position.

Want Some Alkaline Batteries? Get Them Easily From Elephant Batteries

The development of the industrialization process in the world has led to the growth of various industries around the world. Therefore the development process has been also accepted as the proper method of economic strengthening in most developing countries. Industries like the electronics, computer and IT are now the heads of the trade and retrial business. These sectors actually changed the perspective because people and most industry experts never predicted them to be so domination two decades ago. Therefore the development has been significant.

They have not only developed themselves into the forefront but rather pulled several other companies and industry sectors along with them. Several such industries have been raced into new economies by the development of the electronics and specially microelectronics. One such industry component is the battery industry. From being the big car batteries they have grown to fit onto small torchlight, music players and such. The most cutting development that took the world by storm was the introduction of the alkaline battery into the forefront. This development rather put the old school carbon cells back to bed. The alkaline type cells have been known for their superior current discharge, longevity and several other better efficiency performance factors.

The development of the alkaline power cells has been up for some time and the development is made so that their performance can be heightened to better results. These items are made of the same general structure like the normal carbon lead batteries. After all it’s the same electrodes placed in electrolyte which results in the Redox reactions that causes the discharge of the current. For alkaline ones it is necessary that you get them profitable and reliable sources because as with everything in the market these days there are a lot of frauds. One such reliable and trusted company for its battery is the Elephant Batteries.

The company is based in the Canada. The company has been in this industry for a long time and is one of the major distributors of such useful parts of electronic devices in the North American market. Several well known brands like the Fujitsu and other products you can avail from the reputed wholesaler. The Fujitsu batteries are known worldwide for their superior quality and they have been dealing with such reputable brands for a long time now. One of their products is the 9v alkaline battery. This is one of the most highly used items in hobby projects and laboratories around the world. Such store offer 9v alkaline battery for your use at the best prices. There is a lot demand of rechargeable good battery for photographers. Therefore they have type heavy duty Fujitsu of the AA type especially of such uses. Also they are dealer of the AAA type which is known for their superb quality in the best possible small size shell. These parts are one of the best when it comes to remotes, mp3 players and other gadgets as such. Therefore for all your needs for such handy products, contact best places for the best of services and deliverance.

T5 Fluorescent And LED Technology to Create a Versatile Fitting

Cooper Lighting and Safety, a number one manufacturer of mains and emergency lighting solutions for commercial and industrial applications, has launched a new 600 x 600mm recessed luminaire that mixes contemporary aesthetics with the latest T5 fluorescent and LED technology to create a versatile fitting for use in modular suspended ceilings.

Known as Lechenti, the brand new luminaire will come in fully recessed or semi-recessed formats and it is suitable for lay-in or draw-up installations. Opalised side panels made from TPa-rated polycarbonate provide controlled light distribution with excellent transmission and diffused lamp image. In conjunction with the central louvre or microprism panel option, this optical design delivers high efficacy and aids compliance with Part L and LG7 requirements.

Emergency versions from the luminaire feature an integral LED with purpose-designed lens, which achieves exceptionally good light distribution in excess of 10m x 10m and cuts down on the final amount of emergency fittings needed. Providing the absolute minimum duration of 3 hours, the emergency versions can incorporate self-test functionality if neccessary.

Lechenti offers outstanding performance with an LOR (light output ratio) in excess of 80 percent as well as an efficacy in excess of 60 L lm/cW for many variants, which makes them eligible for Enhanced Capital Allowances. Offering a range of 3 x 14W or 4 x 14W configurations with high-frequency control gear as standard, the luminaire could be specified with optional DALI or DSI dimming facilities in addition to integrated lighting controls to maximise energy savings and user comfort.

Adhering to our business philosophy of “people-oriented, customer first, continuous innovation and improvement, pursuit of super excellence”. Our corporate goal of innovation and R&D , drivern by market and customers demands, providing customers with most safest???environment-friendly???energy saving???high quality products and best service. Our corporate goal of “AOYITE Lighting, Illuminate Our Green Life”.

Since the establishment of our own brand “AYT”, with strong research and development ,professional technic team and substantial experience in the industry,we launch new products beyond of customers demand . And now, we have a lot of patents of led lighting products , utility model patents and invention patents.

Toshiba Qosmio G15-av501 Notebook Computer

Purchasing a notebook computer can be a mind boggling experience with all the different makes and models out there. Toshiba has a strong entry in their Toshiba Qosmio G15-AV501 notebook computer. Let’s examine why this particular model is certain to be an effective competitor.

Unlike most laptops the Qosmio takes computing to the next level. You can watch your favorite TV programs, play DVDs, or listen to music by way of its Windows XP Media Center Edition 2005 operating system. Sporting a 17″ screen the Qosmio offers a nifty 1440 x 900 pixels resolution perfect for TV or video watching. Other key features of the Qosmio include:

Intel Pentium M 745 Processor (Centrino), 1.8 GHz

512MB Memory

Television Tuner

Exceptionally Bright Screen

DVD?RW/CD-RW Combination, 2 Hard Drives

Wireless LAN Antenna

Remote Controller

Video Card

NVIDIA GeForce FX Go 5700

Weighs just under 10 lbs.

As much as the Qosmio is an effective performer, I have learned that the battery life is very short compared to models half its $2500. sticker price. That’s right, $2500 [shop around, as prices vary]. So, only serious multimedia experts will go for this machine and they will be keeping it constantly plugged in to boot! Any software you add will be extra, therefore expect to shell out well in excess of three grand if adding a productivity package, extended warranty, shipping, handling, taxes and the like.

Still, serious multimedia fans will find the Toshiba Qosmio to be a top performer in an ever expanding sea of laptop computers. For that reason alone it is worth a special look.