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.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
Let's see if this is good enough to nerd-snipe someone working on the subject...
The cartoon illustrates the use of a particle solution as a large scale method to microstructure metal films embedded in a solar cell.
Back contacts structured as optical gratings have already proven to reduce light loss due to direct reflection. When introducing sub-wavelength apertures into a metal film, both simple coupling to plasmonic surface states as well as enhanced transmission have been reported.
but then again you might just use a DVD surface...
Registered Member #3888
Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
Thought of an idea recently after watching how it's made. I've never seen an electrostatic speaker like the one they had (stood ~4ft tall and ~10in wide, could see right through it) and it used a metalized sheet of plastic as the membrane, which vibrated when a signal was applied.
I thought it might be possible to diy one using an unrolled metalized film capacitor. Not sure when I'll get around to trying it so I thought I'd just share it with you guys.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
hboy007 wrote ...
Let's see if this is good enough to nerd-snipe someone working on the subject...
The cartoon illustrates the use of a particle solution as a large scale method to microstructure metal films embedded in a solar cell.
Back contacts structured as optical gratings have already proven to reduce light loss due to direct reflection. When introducing sub-wavelength apertures into a metal film, both simple coupling to plasmonic surface states as well as enhanced transmission have been reported.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
Christmas ... time to try and change the world for the better
I don't know if anyone has come up with this (and it would kinda spoil the fun to go looking for it): Assuming that man is a creature of habit, a "directional coupler" for highway exits could be created by having drivers keep right. The wrong-way driver is presented with a junction and maybe some direction signs.
Add some spikes and water-filled barrels and you can start your personal collection of wrong-way drivers.
I'd really like to see that structure implemented :D Of course this also works for countries where you drive on the left side.. just mirror the design then
Registered Member #3908
Joined: Tue May 24 2011, 09:40PM
Location: Gilbert, Arizona USA
Posts: 68
hboy007 wrote ...
Christmas ... time to try and change the world for the better
I don't know if anyone has come up with this (and it would kinda spoil the fun to go looking for it): Assuming that man is a creature of habit, a "directional coupler" for highway exits could be created by having drivers keep right. The wrong-way driver is presented with a junction and maybe some direction signs.
Add some spikes and water-filled barrels and you can start your personal collection of wrong-way drivers.
I'd really like to see that structure implemented :D Of course this also works for countries where you drive on the left side.. just mirror the design then
An Excellent concept. I recommend that you should submit your idea to NHTSA. A relatively simple, yet very effective means to divert drunk drivers from the motorway entrance.
Sadly, I witnessed one of these avoidable events ending very badly (in the opposite direction on SR87 in Arizona a year ago). I was unable to notify DPS (police) quickly enough after I'd witnessed the vehicle.
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.
The ideas thread
