Lighting Control:Magnetic Vs. Electronic Low-Voltage Transformers

Transformers that reduce, or step-down, higher voltage to voltages less than 30 volts (V) are called low-voltage transformers. They are commonly used to reduce the standard home 120 volt to 12 volts or 24 volts. A wide variety of everyday appliances use these transformers including low voltage external path lighting, under-counter lighting, door bells and thermostats. Both magnetic and electronic low-voltage transformers are in common use, and each has its advantages.

Function of the Magnetic Low-Voltage Transformer

1. In a magnetic low-voltage transformer, two coils of wire, the primary and secondary coil, are used. The primary coil carries the input or high voltage and creates a magnetic flow, which induces a current in the secondary coil. Since there are more windings in the primary coil than in the secondary, the secondary coil has a lower voltage. The exact output voltage depends on the number of windings in the two coils.


Function of the Electronic Low-Voltage Transformer

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Vodafone Launches Eco-Friendly Vehicle - E-rick !

Vodafone Essar, one of India’s leading cellular services providers, in association with Eco-Activate, announced the launch of the much awaited eco-friendly vehicle, E-rick as the sponsoring partner. Honorable Chief Minister of Delhi; Shiela Dikshit flagged-off the E-rick at her residence. In keeping with Vodafone’s commitment towards a cleaner and greener environment, the launch of E-rick is an effort to provide pollution-free mode of transportation in the capital. E-rick, powered by batteries, aims to ensure reduction in carbon footprint with zero emissions. This technology will reduce the dependence on conventional fuel.

To begin with, the E-rick would be available for commuters on the following routes:
• Chandni Chowk • Saket – Press club Road • IIT – SDA Market area • GK II • Delhi University – North Campus

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After iPad & Slate,Dell Launches Giant Smartphone STREAK !

Tablet war has begun! World's second-largest PC maker Dell’s tablet PC, called Streak, is all set to hit the retail stores. Streak is Dell's bold attempt to grab a share of tablet market which has been witnessing hyper activity from PC makers across the board ever since Apple launched its tablet device iPad.

With some analysts calling it mini tablet or giant smartphone, Dell Streak is half the size of iPad and can also make phone calls unlike Apple’s iPad. Here’s looking into Dell Streak -- Apple iPad’s first big competition. 

Sporting a 5-inch (12.5-centimeter) WVGA screen, Dell Streak features a multi-touch display. However, Streak is smaller than Apple iPad which has a 9.7-inch (24.6-centimeter) diagonal LED-backlit glossy widescreen multi-touch display.

Dell first unveiled its Streak in January, touting the device as a convergence between a typical cell phone and larger tablet computer.

Streak is powered by Google Inc's Android operating system. According to Dell, Streak will launch with Android 1.6. The Tablet is expected to get the latest Android 2.2 update.

The tablet will run on 1GHz Snapdragon ARM-based mobile processor from Qualcomm. 

Memory:-

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BlackBerry Makers Introducing ‘Metadata' In India !

The Canadian firm Research in Motion (RIM), makers of the BlackBerry, has made a fresh attempt to break the logjam over its services in India by offering “metadata” and relevant information to security agencies, which will enable them in lawful interception.

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