Setting up Surveillance cameras at home just got even easier than POE

Discussion in 'The Howard Stern Show' started by dawg, Jun 6, 2015.

  1. dawg

    dawg In The Dog House Staff Member

    Reputations:
    540,870
    Joined:
    Aug 19, 2010
    Messages:
    119,527
    Likes Received:
    90,852
    Wi-Fi used to Power Surveillance Camera

    atheros-ar9285.jpg

    Your WiFi router is currently only delivering data to your devices, but one day it might be able to send power as well. PhD student Vamsi Talla and a team in the Sensor Systems Lab at the University of Washington have devised a system to power low-energy devices using only a WiFi router. It requires a little modification of the signal profile, but it’s possible with existing technology.

    There are already low-power sensors and other devices in the world, but they still need a battery or conventional power source to keep them chugging along. The radio frequency electromagnetic radiation that makes up a WiFi signal contains energy, and there’s a lot of it. Have you ever opened the network list on a device and seen a few dozen hotspots? That’s energy that can be harvested.

    The problem with generating energy from the signals is that WiFi is not consistent. It’s broadcasted in bursts across several different frequencies in the same channel. The team got around this by modifying a router to broadcast noise when a channel was not in active use. The constant hum from the router was enough to capture and power some low-energy devices.

    To test this system, the researchers created a temperature sensor powered entirely by WiFi signals. More impressive is the remote camera (seen above with the temp sensor), which stores power from WiFi in a capacitor. When it has enough, it snaps a picture. The device used in the test was able to take a picture once every 35 minutes with no other power source.

    According to the study, adding the additional noise didn’t interfere with data speeds on the network. Wireless devices all have to be approved by the FCC (and similar international bodies). Any new method of transmitting power via wireless spectrum is sure to experience a lot of regulatory oversight. If the system can be improved, it could form the basis for a future of connected devices, sometimes called the Internet of Things.
     
  2. smichal

    smichal A1 Dick Game

    Reputations:
    131,768
    Joined:
    Jan 15, 2012
    Messages:
    13,495
    Likes Received:
    21,814
  3. Dlist

    Dlist Well-Known Member VIP

    Reputations:
    340,295
    Joined:
    Jan 16, 2012
    Messages:
    28,614
    Likes Received:
    37,742
    Yes, POE (power over ethernet) is good but a wireless device that generates it's own power would be great!


    PS I have several surveillance cameras, a high tech security system and if someone breaks in...there is a hair triggered rigged shot gun that will shoot a burgler in the face :)giggle: I went old school on that last one :))
     
    IfTheyOnlyKnew and Shortwave98 like this.
  4. Shortwave98

    Shortwave98 A-Number 1 Banned User

    Reputations:
    178,992
    Joined:
    Nov 9, 2013
    Messages:
    31,231
    Likes Received:
    31,971
    I've put those up for trade shows up here.
     
    IfTheyOnlyKnew likes this.
  5. x76

    x76 Well-Known Member

    Reputations:
    34,939
    Joined:
    Oct 12, 2010
    Messages:
    4,219
    Likes Received:
    5,521
    1984's Telescreen.