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January 06, 2009
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Breadboard Contains Complete Linux PC
 Consisting of a Quad-band GRPS module and a SiRF3 GPS module, Round Solutions’ AarLogic C10/3 breadboard presents a complete Linux PC on a surface of 104 mm × 63 mm. The component includes interfaces for USB, RS232, and Ethernet components, as well as an SD-card reader to enable the expansion of the standard...
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Web Exclusives
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3D Light Source Shines in Many Directions
Light emitting diodes (LEDs) are light sources that feature high efficiency, energy savings of up to 80%, mercury-free operation, more than 30,000 hours lifetime and impact resistance. It is expected that 150 lumen/watt light efficiency from LEDs can be achieved in the next five years and that 50,000 hours lifetime or more at LM70 can also be achieved in the next few years.
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Estimating Efficiencies of the Optical, Thermal and Electrical Systems in LEDs
There are more than 20 billion light fixtures using incandescent, halogen, or fluorescent lamps worldwide, according to the United States Department of Energy (DOE). Many of these fixtures are being used for directional light applications but are based on lamps that put out light in all directions. The DOE states that recessed downlights are the most common installed luminaire type in new residential construction.
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The Application of LEDs for Industrial LCD Modules
As LCD modules become more widely adopted in the industrial market, the application of LEDs in LCD modules becomes increasingly important. Dynamic color temperature control is one important consideration, particularly when designing for the industrial market, which demands long life cycles combined with high quality and reliability.
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Books & Kits
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Books & Kits: November 2008
Radio Frequency (RF) and Microwave filters are crucial ingredients in many consumer electronics. Devices such as radio, TV, cell-phones, and PDAs all operate on a medium to extremely high frequency range. The RF and Microwave filters (electronic filters) are used for signals sent or received, and are designed to operate in the megahertz to gigahertz frequency ranges.
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Books & Kits - October 2008
If you plan to use an IEEE 802.15.4 radio in a wireless product and don't want to become an RF design engineer in the process, you'll find a lot of value in this kit from Jennic. Although billed as an evaluation kit, you can use it to do serious design work and application programming. I enjoyed working with the modules and found the software easy to use and documents easy to find. In particular, Jennic has done an outstanding job with its user guides and reference manuals.
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Books & Kits: September 2008
Everyone seems to own a variety of wireless devices, from simple garage-door openers to cell phones and GPS receivers. Of course, before these products arrive on store shelves, engineers must design, test, debug, retest, and have products certified to government standards. This volume aims to introduce engineers to an array of measuring instruments, basic RF principles, and measurements of components and digital communications.
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Mini-E is First Highway Legal Pure Electric Vehicle
 Hipsters of the world rejoice! Mini has announced the greatest thing since arthouse theater—an electric version of the Mini Cooper. Unveiled at the 2008 Los Angeles Auto Show, the Mini-E is the first highway legal all-electric vehicle. Amazingly, the Mini-E is heavier than its internal combustion engine (ICE) counterpart (curb weight of 3,230 vs. 2,546 for the ICE). This will satisfy those who feel greater mass equals greater safety. Despite its added bulk, the Mini-E has even greater front/rear weight balance than the ICE.
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European Union to Phase Out Incandescent Bulbs by 2012
 In a move sure to ignite debate on this side of the Atlantic, the European Union approved the phasing out of incandescent bulbs by 2012. Here in the US, we’re debating which technologies should be allowed to earn a label (Energy Star). Over in Europe, they’ve ended the discussion with multinational governmental action. By following the commission’s proposal, EU citizens will save close to 40 TWh per year, and emissions will go down by 15 million tons of CO2 (according to the European Commission). But there’s a larger issue at hand: should government have such control of industry?
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Wind Turbine Design Reduces Blade Size, Saves Money
 Betz’ Law (culled from its namesake, Albert Betz) is a theory for flow machines. From this theory we derive the Betz Limit, that is, “the maximum possible energy...that may be derived by means of an infinitely thin rotor from a fluid flowing at a certain speed.” In windmills, this equates to how much electricity can be harvested from the wind energy. Current technology allows turbines to capture a maximum of 59 percent of the energy in wind...
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Editor's Choice
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LEDs Target SSL
 Created to address solid-state lighting (SSL) applications, the ASMT-Ax00 family of 1-W LEDs from Avago Technologies has a 130-degree viewing angle and comes in a variety of colors, including white. Delivering up to 76 lm at 350mA, the emitters have a maximum allowable junction temperature of 125°C
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White LEDs Implement Advanced Materials, Packaging
 Providing a thermal resistance of 25K/W and available in power levels from 5,600 mcd to 14,000 mcd, the VLMW84xx Series of SMT white LEDs is presented as the first InGaN/TAG on sapphire devices of their type to come in a CLCC-2 flat ceramic package. The 0.75 x 3.3 x 3.4-mm emitters have a service life of up to 50,000 hours, with a typical luminous flux of 27,000 mlm...
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Discovery Opens Potential for Spintronic Logic
 Researchers working at the National Institute of Standards and Technology (NIST) have demonstrated for the first time the existence of a key magnetic—as opposed to electronic—property of specially built semiconductor devices. This discovery raises hopes for even smaller and faster gadgets that could result from magnetic data storage in a semiconductor material, which could then quickly process the data through built-in logic circuits controlled by electric fields.
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