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

Leftovers: Gaming

  • Launching into Orbit
    We’re excited to announce today the release of a BioWare project that’s unlike anything we’ve done before. Over the past few months, the BioWare Online Services team has been working hard on the next-generation of our online technology platform: Orbit.
  • The Big SuperTuxKart Update Is Almost Ready
    Towards the end of last year a development version of a big new version of SuperTuxKart was released that brought a new OpenGL 3.1+ graphics engine and other improvements. The new SuperTuxKart game looks great (especially for being an open-source game) and is now closer to being officially released with now having an RC version out.
  • Humble Indie Bundle 14 Drops Torchlight 2, Outlast, and Other Awesome Games on Linux
    Following on the footsteps of the fantastic success of the previous Humble Indie Bundle initiatives, the awesome people behind Humble Bundle, Inc. have put together yet another amazing collection of cross-platform games entitled Humble Indie Bundle 14.
  • New Linux Gaming Survey For April
    The new GOL survey for April is now available, so please make sure to fill it in if you have the time.
  • Team Fortress 2 Update Brings Balancing Fixes
    Team Fortress 2 is an online multiplayer game developed by Valve and it's one of the most popular titles on Steam for Linux. A new update has been released for it, and it applies to the Linux version as well.
  • Grass Simulator Fully Released With Linux Support
    April Fools! Wait, this is real? Grass Simulator added Linux support recently, and today they have released the final version.

Android Leftovers

CentOS 7 Update and Red Hat

  • Latest CentOS 7 Update Brings Support for Intel Broadwell, AMD Hawaii, and Btrfs
    The CentOS development team, through Karanbir Singh, announced at the end of March 2015 that a new build for the stable CentOS 7 Linux operating system is available for download and update.
  • CentOS 7.1-1503 Screenshot Tour
  • Red Hat helping you (J)Boss your Big Data
    New product enhancements are designed to help enterprises get more out of their Big Data.
  • JOSE – JSON Object Signing and Encryption
    Federated Identity Management has become very widespread in past years – in addition to enterprise deployments a lot of popular web services allow users to carry their identity over multiple sites. Social networking sites especially are in a good position to drive the federated identity management, as they have both critical mass of users and the incentive to become an identity provider. As the users move away from a single device to using multiple portable devices, there is a constant pressure to make the federated identity protocols simpler (with respect to complexity), more user friendly (especially for developers) and easier to implement (on wide range of devices and platforms).

Linux in the Old Homestead

My darling daughter Mimi, who had installed Debian when she was 9 (with her proud father watching over her shoulder), had been an Ubuntu user for years. We’ll get to why that was OK with her Dad in a minute. Unity, of course, changed everything: She hated it as much as her father did (and does), and she switched to Linux Mint, which she had been using for the last several years. Read more