Language Selection

English French German Italian Portuguese Spanish

power over ethernet

Filed under
Sci/Tech

power over ethernet lets you add a dc voltage source to the unused pairs in your ethernet cable. this power can be used to power devices that are poe compatible by just plugging the cable into them. other devices can be powered by using a “tap” to break the dc pairs back out of the cable. poe is a good choice for powering devices in remote locations. a router can be placed on a roof right next to its high-gain antenna, reducing signal loss, without having to run a separate ac line. plugging the dc “injector” into a ups will keep dedicated voip phones functioning during a power outage. terry schmidt has written a nice guide covering the theory behind scratch building poe injectors and taps. it also has photos and descriptions of other peoples projects along with tips on how to keep from turning your router into a pile of plastic goo.

Instructions.

Source.

More in Tux Machines

Tizen News

Mozilla Firefox Quantum

  • Can the new Firefox Quantum regain its web browser market share?
    When Firefox was introduced in 2004, it was designed to be a lean and optimized web browser, based on the bloated code from the Mozilla Suite. Between 2004 and 2009, many considered Firefox to be the best web browser, since it was faster, more secure, offered tabbed browsing and was more customizable through extensions than Microsoft’s Internet Explorer. When Chrome was introduced in 2008, it took many of Firefox’s best ideas and improved on them. Since 2010, Chrome has eaten away at Firefox’s market share, relegating Firefox to a tiny niche of free software enthusiasts and tinkerers who like the customization of its XUL extensions. According to StatCounter, Firefox’s market share of web browsers has fallen from 31.8% in December 2009 to just 6.1% today. Firefox can take comfort in the fact that it is now virtually tied with its former arch-nemesis, Internet Explorer and its variants. All of Microsoft’s browsers only account for 6.2% of current web browsing according to StatCounter. Microsoft has largely been replaced by Google, whose web browsers now controls 56.5% of the market. Even worse, is the fact that the WebKit engine used by Google now represents over 83% of web browsing, so web sites are increasingly focusing on compatibility with just one web engine. While Google and Apple are more supportive of W3C and open standards than Microsoft was in the late 90s, the web is increasingly being monopolized by one web engine and two companies, whose business models are not always based on the best interests of users or their rights.
  • Firefox Nightly Adds CSD Option
    I’ve said it before and I’ll say it again: Firefox 57 is awesome — so awesome that I’m finally using it as my default browser again. But there is one thing it the Linux version of Firefox sorely needs: client-side decoration.

First Renesas based Raspberry Pi clone runs Linux

iWave’s “iW-RainboW-G23S” SBC runs Linux on a Renesas RZ/G1C, and offers -20 to 85°C support and expansion headers including a RPi-compatible 40-pin link. iWave’s iW-RainboW-G23S is the first board we’ve seen to tap the Renesas RZ/G1C SoC, which debuted earlier this year. It’s also the first Renesas based SBC we’ve seen that features the increasingly ubiquitous Raspberry Pi 85 x 56mm footprint, layout, and RPi-compatible 40-pin expansion connector. The board is also notable for providing -20 to 85°C temperature support. Read more Also: GameShell Is An Open Source And Linux-powered Retro Game Console That You’ll Love

Games: SuperTuxKart, Tannenberg, Observer