Now, Send SMS Through Your Thoughts!

The Japanese are developing a new generation of consumer electronics devices that have the ability to read a user's mind and automatically do as he wishes. For instance you could change a television channel by thinking or even send an sms composed through your thoughts, reports Yahoo! News. Tomoo Yamauchi, director, research and development division, Ministry of Internal Affairs and Communications, said that a clutch of Japanese companies and research institutes are working on the gadgets, which could be commercially available in as little as ten years

Dell To Launch Its Own Mobile Phone

Computer maker Dell is launching its own cellphone, which some feel is akin to a piece of art. Called the lightning Mobile, it is being portrayed as the ultimate Windows 7 Phone. At first glance it looks like all screen until the hidden QWERTY keyboard reveals itself to slide the screen up. The Windows Phone 7 portrait slider comes with multi touch features.

The phone will be available with an extended 11 cm (4.1") OLED display, a 1GHz QSD8250 Snapdragon processor, and comes equipped with 1GB of flash with 512MB Ram, and a MicroSD card with additional 8GB of storage.

Diode

In electronics, a diode is a two- terminal electronic component that conducts electric current in only one direction. The term usually refers to a semiconductor diode, the most common type today, which is a crystal of semiconductor connected to two electrical terminals, a p.n junction. A vacuum tube diode, now little used, is a vaccume tube with two electrodes; a plate and a cathode

The most common function of a diode is to allow an electric current in one direction (called the diode's forward direction) while blocking current in the opposite direction (the reverse direction). Thus, the diode can be thought of as an electronic version of a check valve. This unidirectional behavior is called rectification , and is used to convert alternating to direct current, and extract modulation from radio signals in radio receivers.

However, diodes can have more complicated behavior than this simple on-off action, due to their complex non linear electrical characteristics, which can be tailored by varying the construction of their pn junction. These are exploited in special purpose diodes that perform many different functions. Diodes are used to regulate voltage zener diode, electronically tune radio and TV receivers (varactor diode), generate radio frequency diode tunnel diode, and produce light (light emitting diode)

Diodes were the first semiconductor device. The discovery of crystals' rectifying abilities abilities was made by German ferdinand braun in 1874. The first semiconductor diodes, called cat's wisker diode were made of crystals of minerals such as gelena. Today most diodes are made of silicon, but other semiconductors such as germanium are sometimes used

Solar cell

A solar cell is a device that converts the energy of sunlight directly into electricity by thephotovoltics cell. Sometimes the term solar cell is reserved for devices intended specifically to capture energy from sunlight such as solar panels and solar cells, while the term photovoltaic cell is used when the light source is unspecified. Assemblies of cells are used to make solar panel, solar module. photovoltics is the field of technology and research related to the application of solar cells in producing electricity for practical use. The energy generated this way is an example of solar energy

Applications and implementations

Solar cells are often electrically connected and encapsulated as a module. Photovoltaic modules often have a sheet of glass on the front (sun up) side, allowing light to pass while protecting the semiconductor wafers from the elements . Solar cells are also usually connected in series in modules, creating an additive voltage.

above figure is systematic symbol of solar cell

onnecting cells in parallel will yield a higher current. Modules are then interconnected, in seri

es or parallel, or both, to create an array with the desired peak DC voltage and current.

The power output of a solar array is measu

red in watts or kilowatts. In order to calculate the typical energy needs of the application, a measurement in wattshours, kilowatt-hours or kilowatt-hours per day is often used. A common rule thumb is that average power is equal to 20% of peak power, so that each peak kilowatt of solar array output power corresponds to energy production of 4.8 kWh per day (24 hours x 1 kW x 20% = 4.8 kWh)

To make practical use of the solar-generated energy, the electricity is most often fed into the electricity grid using inverters (grid-connected photovoltaic systems); in stand-alone systems, batteries are used to store the energy that is not needed immediately.

Solar cells can also be applied to other electronics devices to make it self-power sustainable in the sun. There are solar cell phone chargers, solar bike light and solar camping lanterns that people can adopt for daily use.