CHEVROLET CHEETAH A K A �THE COBRA KILLER�

Watch the video of CHEVROLET CHEETAH A.K.A �THE COBRA KILLER� .Thomas, who was also known as "Mr. Corvette", used a Corvette small-black V8 as the donor engine. He increased the displacement to over 6 liters and fitted it with Rochester Fuel Injection, which he himself had developed.

Maximum power is said to have been around 520 hp, which was phenomenal in those days. The innovation didnt stop there, as Mr. Thomas used an advanced spaceframe chassis, seen at that time on European racers, and managed to distribute the weight almost perfectly between the front and rear axles (48:52 front/rear).

Power Flip Flop Using A Triac

Modern electronics is indispensable for every large model railroad system, and it provides a solution to almost every problem. Although ready-made products are exorbitantly expensive, clever electronics hobbyists try to use a minimum number of components to achieve optimum results together with low costs. This approach can be demonstrated using the rather unusual semiconductor power flip-flop described here. A flip-flop is a toggling circuit with two stable switching states (bistable multivibrator). It maintains its output state even in the absence of an input pulse.

Flip-flops can easily be implemented using triacs if no DC voltage is available. Triacs are also so inexpensive that they are often used by model railway builders as semiconductor power switches. The decisive advantage of triacs is that they are bi-directional, which means they can be triggered during both the positive and the negative half-cycle by applying an AC voltage to the gate electrode (G). The polarity of the trigger voltage is thus irrelevant. Triggering with a DC current is also possible. Figure 1 shows the circuit diagram of such a power flop-flop. A permanent magnet is fitted to the model train, and when it travels from left to right, the magnet switches the flip-flop on and off via reed switches S1 and S2.

Circuit diagram:

In order for this to work in both directions of travel, another pair of reed switches (S3 and S4) is connected in parallel with S1 and S2. Briefly closing S1 or S3 triggers the triac. The RC network C1/R2, which acts as a phase shifter, maintains the trigger current. The current through R2, C1 and the gate electrode (G) reaches its maximum value when the voltage across the load passes through zero. This causes the triac to be triggered anew for each half-cycle, even though no pulse is present at the gate. It remains triggered until S2 or S4 is closed, which causes it to return to the blocking state.The load can be incandescent lamps in the station area (platform lighting) or a solenoid-operated device, such as a crossing gate. The LED connected across the output (with a rectifier diode) indicates the state of the flip-flop. 

The circuit shown here is designed for use in a model railway system, but there is no reason why it could not be used for other applications. The reed switches can also be replaced by normal pushbutton switches. For the commonly used TIC206D triac, which has a maximum current rating of 4 A, no heat sink is necessary in this application unless a load current exceeding 1 A must be supplied continuously or for an extended period of time. If the switch-on or switch-off pulse proves to be inadequate, the value of electrolytic capacitor C1 must be increased slightly.

 

 

 

 

Source by : http://streampowers.blogspot.com/2012/06/power-flip-flop-using-triac.html

A Kahn Design Audi Q7 Wide Track

Staying true to his philosophy of combining mechanical perfection and exterior beauty, Afzal Kahn’s formula of club-class quality and high-tech engineering puts the wide track Audi Q7 (available in ibis and pearl white) somewhere near the top of the premium SUV pile.

The Audi Q7 Wide Track comes with an aerodynamically efficient exterior package consisting of vented front replacement wings, front bumper sections with gunmetal grey detailing, rear vented bumper, large upper roof wing, wide wheel arches with rear vented spats, machined aluminum vented foot pedals, door entry sill plates in stainless steel, replacement wings, LED daytime running lights, Kahn stainless steel exhaust system, liquid gold calipers and mirror backs finished in gunmetal grey, exhibits an increased level of interaction coupled with a sense of motor supremacy and style.

The Kahn Q7 also offers lots of performance – this 3.0-litre TDI diesel isnt disgraced, with 233bhp shoving it to 60mph in just 8.4 seconds.

Equally impressive is the tiptronic transmission, shifting down on hills to improve engine braking. It certainly complements the Kahn foot pedals, and the Q7 has handling to match the performance. The air suspension includes roll control and height adjustability, making the car nimble and composed around corners.

Another unique feature of this model is the amazing interior which has been upgraded to a magnificent level with the front and rear seats in black quilted perforated nappa leather with red stitching along with a speedo and rev counter in red and cream.

However, we provide our customers with the opportunity to express one’s individuality. And they can have whatever they want. We could, for example, design for you a vehicle with an exterior matching your shoes and an interior the same shade of your living room, the choice is yours.

Kahn wheels sit perfectly, on any vehicle, conveying the essence of the vehicle’s identity. Created using state-of-the art manufacturing and materials technology, the 22” Kahn RSX 22” wheels are finished in gunmetal grey and fit all original centre caps.

2013 Mercedes Benz A Class

The third-generation A-Class in September 2012 in the trade.

The compact premium segment worldwide is becoming increasingly important with the new 2013 Mercedes A-class would like to get involved properly in this segment from autumn 2012 and presents a completely new A-Class.

The engineers had the opportunity to work with a blank sheet of paper in the planning of the 3rd Going generation A-Class. This should be the new A-class in any case be very different than the predecessors to appeal to a wider audience.

The second generation Mercedes could reach rather more staid term especially with the new A-Class you would like to make Audi A3, BMW 1 Series and the new Volvo V40 alienate customers.

Mercedes says that it is serious about his challenge, you can see at first glance. A fully styled by A-class Mercedes for going with unusual athleticism to the starting line was born.

To continue to provide for any potential buyer a suitable A-class model, we have also created various equipment lines. With the lines of "Urban", "style" and "AMG Sport" and the three design packages ("Night", "exclusive" and "exclusive AMG", the new A-Class can have from the start, make very individual.

In addition, numerous options are available, the cars are so far only been available gehobenerer classes, such as an adaptive cruise control, PreSafe, the Intelligent Light System or electrically adjustable leather seats with memory.

Comprehensive safety features round out the positive first impression for the new A-Class continues to decrease. As standard, the Collision Prevention and Attention Assist Assist provide more security. The Collision Prevention Assist warns the driver may be distracted from obstacles and prepares the brake system even for emergency braking.

This can score the new 2013 A-Class not only looks at the young, strong purchasing power target group, is to sell it a full iPhone integration, where you hear his music from the phone in the car, facebook news, the phone on the vehicle display can use. A version for Android is already in the pipeline, but will still have something coming.

To start, there will be 1.6 to 2.0 liter gasoline engine with an output between 122 hp (90 kW) and 211 hp (155 kW) and 1.5 liters to 1.8 liters of diesel engines with an output of 109 hp (80 kW ) provide up to 136 hp (100 kW). The 170-hp diesel will follow at the end of the year.

All engines have the BlueEFFICIENCY technology and are extremely economical way. The best value achieved while the base diesel with 109 hp, which is to come to a consumption of just 3.8 liters. The CO2 emissions in this case is only 98 g / km.

On request for the new A-Class instead of the 6-speed manual gearbox, the new 7G-DCT dual-clutch gearbox, which is equipped with the software from the SLS AMG, and so provides lightning fast gear changes. In a first exit we could have the A 220 CDI with its 170-horsepower diesels and the top model in the preliminary series, the A250, get to know.

As sporty looks, the new A-class outside so athletic, it also goes further in the interior. The test vehicles are AMG sports seats, sports trim with comfortable including integrated headrests, a generous use of carbon-look trim components and soft-touch surfaces.

Which now provides built-in automatic selector lever on the steering column for the double-clutch gearbox in place of the center console, which will find a very comfortable center armrest and two cupholders and a large locker room.

Despite the sporty body design, there is enough room inside for passengers. Also, the trunk volume is 341 liters with dimensions remarkably abundant.

For frequent travelers, the new A 220 CDI presents an ideal companion, who can convince a lot of power from low engine speeds and the 7G-DCT gearbox. The sporty design of suspension and chassis should be chosen only by real sports fanatics, comfort-oriented buyers will have at the very sporty design no joy.

In addition, this chassis fits clearly better for the A250, the strongest start to the A-Class model. With an output of 211 hp, the A250 convince even die-hard sports fans. The sprint from 0 to 100 km / h in 6.6 seconds and top speed is 240 km / h

On a handling course at the airport in Portoroz we were able to convince us of the excellent chassis. The A250 sports a front-wheel drive vehicle allows for breathtaking cornering speeds and remains even in extreme cases, even well predictable and controllable.
The maximum torque of 350 Nm is already available at 1,200 r / min and maintained up to 4000 rev / min.

But the new A-Class is only at the beginning of a true model initiative of the smallest Mercedes model. As early as the beginning of 2013 will come with the A45 AMG A-Class, the sportiest of all time on the market, which will also feature four-wheel drive. A little later, then follow other forms of bodywork based on the new 2013 Mercedes A-Class.

Photo Credit: © Mercedes-Benz

Coming up A library of human brains in US

The Digital Brain Library at the University of California is being done with the help of some 300 brain donors.A unique library, a library of human brains, is being assembled in San Diego, US. It is being done with the help of some 300 brain donors, which include people from all walks of life, some of whom are healthy and some of whom have life-threatening brain disorders.
The Digital Brain Library at the University of California, San Diego School of Medicine, is a unique attempt to understand human brain.
The actual effort began a few years ago when The Brain Observatory at UC San Diego was charged with the examination of the brain of Henry G. Molaison, an amnesic who famously could not hold any memory longer than twenty seconds. Molaison died in 2008, endowing his brain to The Brain Observatory, headed by neuroanatomist Jacopo Annese. "Its the most important brain in the modern history of medicine," Annese said.
The patients undertake a series of tests during the course of their lives - and then donate their brains when they die. Slices of their brain are scanned and the images are digitally preserved, allowing doctors to search for clues to both neurological diseases and the secrets behind human longevity.
Annese says the librarys wealth of information could also help doctors discover the telltale signs of serious brain illnesses long before they actually appear