Microchip's Kavaiya: He's got a potato-powered clock too!
Gaurang Kavaiya, a principal applications engineer at Microchip Technology, was trying to figure out what prop would best illustrate the features of the company's new family of PIC Microcontrollers featuring nanoWatt Technology. And get the attention of engineers at trade shows. Then, inspiration struck: What better way to showcase what Microchip claims is "the industry's lowest power technology for embedded systems" than to use fruit as the power source for a digital thermometer? Okay, he sort of cheated when he used a grapefruit. According to one experiment published on the web that employed zinc and copper electrodes, grapefruits average a 0.93V output, which tops oranges (0.89V), kiwis (0.85V), and the lowly tomato (0.62V). Though the type of electrodes matter more than the fruit, the sight of a grapefruit powering a nanoWatt microcontroller, temperature sensor (a thermistor), and a 3.5-digit LCD display has been drawing crowds at trade shows since Microchip introduced the nanoWatt line in February. Oh, and just in case anyone is wondering, the technology itself has been garnering interest from a wide range of design engineers, particularly those challenged by the need to extend battery life in mobile electronic devices. To help engineers come up to speed on nanoWatt, Microchip offers a host of tips on its website at http://www.microchip.com/download/tools/picmicro/demo/pdem4/41200a.pdf. And for those engineers who want a good party trick, Gaurang has graciously agreed to let Design News publish the instructions
for his grapefruit-powered thermometer. Download them at http://www.manufacturing.net/contents/pdf/grapefruitdemo.pdf, along with a parts list. For those looking for more insight into edible power sources, check out Erika Lindstrom's "The Electric Fruits" at http://members.aol.com/dswart/ElectricFruits.pdf and www.madsci.org.
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team £100 to make (about $161 US).
The increased adoption of wireless technology for mission-critical applications has revved up the global market for dynamic electronic general purpose (GP) test equipment. As the link between cloud networks and devices -- smartphones, tablets, and notebooks -- results in more complex devices under test, the demand for radio frequency test equipment is starting to intensify.
Much of the research on lithium-ion batteries is focused on how to make the batteries charge more quickly and last longer than they currently do, work that would significantly improve the experience of mobile device users, as well EV and hybrid car drivers. Researchers in Singapore have come up with what seems like the best solution so far -- a battery that can recharge itself in mere minutes and has a potential lifespan of 20 years.
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