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August 5, 2013

Jetta Hybrid

Filed under: LED Lamp — Tags: — solaroutdoorlight @ 3:10 am

When the Jetta Hybrid arrived at my home, I took a look at the window sticker in the glove box and the headline from VW read: “The Hybrid for Turbo Fans.” That couldn’t be any truer.

VW took the hybrid concept a step further, making the already-popular Jetta a turbo/hybrid vehicle. It became available to the public in December 2012, so it’s new.

The 1.4L turbo engine and 16-volt electric motor, which produce 170 horsepower, combine with front-wheel drive to make this car great.

The power is dished out through a seven-speed automatic transmission, but there isn’t a normal tachometer like you may be used to seeing. It’s more like an “mpg gauge” where you can see exactly how efficient you are being with the accelerator. A typical hybrid display shows you where the energy is being applied at any given moment. This gauge is the only difference from a normal Jetta gauge cluster.

On the outside are some unique wheels that resemble turbine blades and “hybrid” badges on the front fenders. Up front are cool LED daytime running lights with adaptive HID headlamps and around back are LED tail lamps. All of the VW logos on the car have a thin blue ring behind them to distinguish this as a hybrid from the other VWs.

Inside is the same Jetta you’ve come to love and expect.

Comfortable seats, a good ride and decent handling are still staples of this midsized sedan. Driving around town you’ll find the hybrid is more “electric” than gas, but the gas engine seems to run a decent amount no matter what.

HID kit

Once you step on the throttle and head down an on-ramp you will feel why this car is going to be popular. The revs jump and the turbo spools to provide a solid push that takes you to highway speeds very quickly. Once at highway speed, the car maintains cruise control well and switches to EV mode when the terrain allows, saving you fuel.

In fact, any time you feel the need for extra power the turbo is within reach and the power transfer is fairly smooth. It helps to drive this hybrid a little more reserved than you would normally to squeeze all the MPG you possibly can.

I think this car will be well received for those looking to get decent mileage while standing out in the crowd and not sacrificing interior space or performance.

For the most part it resembles a Jetta GLI, has all the interior room — minus some trunk space where the batteries are located — and has a turbo engine with good power. I had some issues with the tire pressure monitor system light staying on when all the tires were inflated to the proper pressure.

VW rates the hybrid at 45 mpg combined, and I was able to manage 36 mpg with several trips into Pittsburgh and back to Beaver.

With the fuel tank being only 11.8 gallons, even at 36 mpg you will fill up frequently.

The sticker price is $31,975 which is on par with other hybrid cars, but the sleek exterior and great all-around performance may sway your opinion.

June 8, 2013

Integrating LED and high-electron-mobility transistor

Filed under: LED Lamp — Tags: — solaroutdoorlight @ 5:38 am

Researchers from the Smart Lighting Engineering Research Center at Rensselaer Polytechnic Institute have successfully integrated an LED and a power transistor on the same gallium nitride (GaN) chip. This innovation could open the door to a new generation of LED technology that is less expensive to manufacture, significantly more efficient, and which enables new functionalities and applications far beyond illumination.

At the heart of today’s LED (light-emitting diode) lighting systems are chips made from GaN, a semiconductor material. For the LED to function, many external components-such as inductors, capacitors, silicon interconnects, and wires-must be installed on or integrated into the chip. The large size of the chip, with all of these necessary components, complicates the design and performance of LED lighting products. Additionally, the process of assembling these complex LED lighting systems can be slow, manually intensive, and expensive.

In a new study led by T Paul Chow, professor in the Department of Electrical, Computer, and Systems Engineering (ECSE) at Rensselaer, the researchers sought to solve this challenge by developing a chip with components all made from GaN. This type of monolithically integrated chip simplifies LED device manufacturing, with fewer assembly steps and less required automation. Additionally, LED devices made with monolithically integrated chips will have fewer parts to malfunction, higher energy efficiency and cost effectiveness, and greater lighting design flexibility.

Chow and the research team grew a GaN LED structure directly on top of a GaN high-electron-mobility transistor (HEMT) structure. They used several basic techniques to interconnect the two regions, creating what they are calling the first monolithic integration of a HEMT and an LED on the same GaN-based chip. The device, grown on a sapphire substrate, demonstrated light output and light density comparable to standard GaN LED devices. Chow said the study is an important step toward the creation of a new class of optoelectronic device called a light emitting integrated circuit (LEIC).

“Just as the integration of many silicon devices in a single chip – integrated circuits – has enabled powerful compact computers and a wide range of smart device technology, the LEIC will play a pivotal role in cost-effective monolithic integration of electronics and LED technology for new smart lighting applications and more efficient LED lighting systems,” Chow said.Increase the performance and visual appearance of your headlights with hid lights and bulbs.

“This new study, and the device we have created,Learn how daytime running lights use gas and the amount it takes to power these lights. is just the tip of the iceberg,” said Smart Lighting ERC director Robert Karlicek, a co-author of the study and ECSE professor at Rensselaer. “LEICs will result in even higher energy efficiency of LED lighting systems. But what will be even more exciting are the new devices, new applications, and new breakthroughs enabled by LEICs – they will truly usher in the era of smart lighting.”

This research was funded by the National Science Foundation through the Smart Lighting ERC, with additional support from New York state though Empire State Development’s Division of Science, Technology and Innovation (NYSTAR).

The Smart Lighting ERC is primarily funded by the NSF. Since opening in 2008,Buy hid kit, ballasts, and headlight bulbs. the ERC has enlisted more than 25 key industrial partners to help guide the center’s research programs and hasten the transition from product idea to testing and commercialization. The center has a strong focus on the integration of LEDs and advanced control technology for the design of smart lighting systems. Along with being highly energy efficient and producing higher quality light, these smarter, feature-rich systems are poised to enable entirely new applications in areas as diverse as communications, health care, and biohazard sensing.

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