Friday, July 19, 2013

How Does a Transistor Work?

How Does a Transistor Work?: "Transistors are an important, integral part of all the electronic devices we love to use every day, but how do they work? Veritasium discusses the science of semi-conductor materials, doping with impurities, gates, and depletion layers that make transistor technology possible."

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Walmart debut for OLPC XO Tablet

Walmart debut for OLPC XO Tablet: "For the last few years, non-profit One Laptop Per Child (OLPC) has been steadily producing rugged, low-cost, low-power connected laptops for children in the developing world. 2.5 million units and 60 countries later, and its latest learning package is headed for decidedly First World hands courtesy of Walmart. Made by Vivitar, the 7-inch XO Tablet features a unique Dreams interface that organizes content by aspirational topics rather than by apps."

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Which device early upgrade option offers the best value? | Mobile - CNET News

Which device early upgrade option offers the best value? | Mobile - CNET News: "AT&T, T-Mobile, and Verizon Wireless have each introduced new "early upgrade" programs that allow wireless customers to trade in their smartphones as often as every six months. Are these plans really worth the cost? And which one offers the most value?"

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