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 #192
Joined: Fri Feb 17 2006, 03:08AM
Location: Canada
Posts: 44
Hello,
I was surfing the net for UV leds and found something very interesting. Opto Technologies has these SHARK high power emitters, some in the UV range and other are IR. They look like a transistor but actually have 50 leds in them. It works out to 1/4 watt of UV energy output. The IR units could be used for IR illumination. I thought you should see them, but what applications could we have for them.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I can only think of 2 things... Checking for glow-in-the-dark rocks, or curing UV epoxy.
I doubt that you will get enough energy to do much UV curing (my incandescent gun is like 50w), and for finding rocks a small handheld 7w tube would be a lot cheaper.
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
I've been thinking, but I can't really come up with anything... I guess the UV is a bit too concentrated for exposing PCBs.
However something like that is ideal for sending data, or audiomodulating. It's easy to mount and a good size for having a lens mounted in front of it, you could probably get across a valley with it, except IR is usually used anyway. I'm not sure what you'd use on the recieving end for a UV link (or if it would even work due to the atmosphere).
Now if one of those were available in IR, I would be very interested indeed!
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
You can use IR laser from DVD-writer as a powerful and fast transmitting source.
UV LED's simply aren't designed for such application.
To un-concetrate the light you can simply move the source away from PCB; anyway, there is actually little use for such a thing while looking on it's price.
Registered Member #311
Joined: Sun Mar 12 2006, 08:28PM
Location:
Posts: 253
... wrote ...
I can only think of 2 things... Checking for glow-in-the-dark rocks, or curing UV epoxy.
I doubt that you will get enough energy to do much UV curing (my incandescent gun is like 50w), and for finding rocks a small handheld 7w tube would be a lot cheaper.
But your gun probably puts out a tiny fraction of this wattage as UV. LEDs are a lot more efficient. UV Curing of things like dental adhesives is one common application.
Banned on April 8th, 2007. Registered Member #597
Joined: Thu Mar 22 2007, 03:33AM
Location: Seattle, WA
Posts: 16
Heh. I bet they *won't* send me free samples.
Hmmm. If it's bright enough to cure the entire surface of a pool of plastic monomer, maybe it could be used for stereolithography "3D printer" rather than a UV laser. Put an LCD over the liquid pool to cast programmable shadows.
Also, I think 365nM is getting into the nasty range. Kill bacteria, cornea damage, etc. The UV LEDs from DigiKey etc. are more like 395nM, barely UV at all.
Registered Member #799
Joined: Wed May 23 2007, 05:24PM
Location: Barrie. Ontario, Canada
Posts: 25
Hello, Powerfull UV LED's may be also used for air and water purification ( Killing germs and bacteria) and also generating ozone. If a power UV LED is placed inside an integarting sphere , it will be a powerful tool to cleanse the air inside the sphere.
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.
high power UV emitter - possible uses
