If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Hye Marko & strider, I am new here...I am working same project with strider on a wireless electricity project for my final year project but using router 802.11g as a transmitter (2.4Ghz). Any idea? The receiver can receive the frequency 2.4Ghz ? How can i build the receiver for frequency from the router? can someone help me...please...
Lucifer you need to receive your signal using a router? what amount of power you are sending and what type of devices you are looking to use as load? please give more details so we can have better view to see how we can help
you need a harvesting circuit cause router power level is very low (micro to pico Watt).. Try to see Powercast Technology it will give you some help, also if you need further help you can reach me through my msn and skype posted on the post with pics above
Registered Member #883
Joined: Sat Jul 07 2007, 01:02PM
Location:
Posts: 16
I think that this technology is in use ore than we think about in our everyday lives. It is the principal used in rfid tags used for loss prevention in stores. Just yesterday i say an induction charger for wii remotes where you just set the controller on the charging pad in any orientation to charge it.
Registered Member #531
Joined: Sat Feb 17 2007, 10:51AM
Location: Burlington, Vermont
Posts: 125
A quick prototype I put together at work as a concept demonstrator a year or so ago.
The low Q obtained with the printed planar inductor limited the overall range to ~30cm when using a third "repeating" resonator. This is running 2 watts at 1 MHZ input from a tiny class E oscillator. A larger high Q system was eventually built that delivered 10s of watts at ~70% transfer efficiency over a 20 cm gap.
Personally I don't understand why the MIT team and everyone who has followed believes this is anything new or innovative. Loosely coupled high Q resonators are quite venerable. All the MIT team did was re-describe the process in terms normally reserved for optical processes. Heck, they even won a MacArthur grant for demonstrating something Tesla was photographed doing more than a century ago!
Can someone explain to me what the MIT team did to improve efficiency and transfer range so much other than ensuring a good frequency match with the recieving coil. (google isnt too consistent)
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
What the MIT did that was new was publish their findings with a bunch of buzzwords and let the media loose on it. They made no innovation that tesla/marconi/etc (and possibly some of the people before them) didn't think of, and hasn't been well tested/documented by anyone doing RF work.
How about evanescent resonance?? its used but in wireless electricity, also MIT had already admit that the concept is not new however they had make use of it on a good fashion. so if you can do better or make use of good concept in a good project you will gain a lot of respect for that
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Miniature wireless power demonstrator
