Wednesday, September 18, 2013

Found: Science fair project uses Peltier to power battery-free flashlight

A 15-year-old high school student by the name of Ann Makosinski has invented a flashlight that draws power from the heat generated from the palms of your hands. Dubbed the “hollow flashlight,” it uses the Peltier effect (the same technology that was once the go-to method for extreme overclockers before liquid nitrogen became the norm) to create electricity that is then used to power the flashlight.

If you are unfamiliar, a Pelter is able to generate voltage when there is a different temperature on either side of the “plate.” In the case of the hollow flashlight, the warm side is heated by the user’s palm while the opposite side is cooled by the ambient air and a passive heatsink.

Facebook plays host to more than 250 billion user photos



Facebook recently published a white paper concerning Internet.org, the social network’s plan to get the rest of the world online with the help of Ericsson, MediaTek, Nokia, Opera, Qualcomm and Samsung. In it, the company shared some rather interesting statistics related to the amount of media shared on the site.

Nvidia reveals 7-inch, $199 Tegra 4-powered Note for OEM partners



Nvidia has officially taken the wraps off the Tegra Note, an Android-powered tablet that hopes to shake things up in the already overpopulated market. Nvidia won’t be selling the slate directly but will instead rely on partners like EVGA, PNY Technologies and Zotac to handle that task.