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 #120
Joined: Fri Feb 10 2006, 07:07AM
Location: Westchester New York
Posts: 83
Ultra fast question here. If I were to make a coin shrinker, would 1400V or 1800V be sufficient enough at 6kJ? Like wise would this voltage and energy be sufficient for a rail gun? Basically I want to make a surge generator, fully digital and what not, that can be used for multiple applications.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
first, we need more info , the coil dimensoins and such, its current doing the squeezing work, not voltage. so will 1400 to 1800 volts be enough?
answer = maybe. capacitence at 6kJ / 1400 v = amps, restricted by R*L*C though most people do this at 10-24kv (and some crazy guy has a 45kv one!) i have never seen anyone successful at less than 6kv, at maybe 20-100 kAmps if you can generate 20-100 kamps at 1800v then your good, if not your screwed
its been awhile since ive done this trick, but there are web sites that go over this in detail. you need to be sure of your safety, waqtch you tube, its explosive and DEAFENING!
as for a rail gun , i dont know, but wish had one.
second, how the hell do you have so many stars! how are these awarded on this site?
Registered Member #120
Joined: Fri Feb 10 2006, 07:07AM
Location: Westchester New York
Posts: 83
Thats a good question, I actually never noticed that till now. I come here on and off again, however, I'll probably be talking more since I finally landed a job and graduated college. I have a ton more time without school.
My issue is that I want everything to be solid state, hence, use SCR's. I understand that 1kV is pretty low and I won't get as high of a peak current. I guess I can just make a smaller solid state one for messing around. Also using a high voltage would lower the RC time constant (more voltage and less capacitance at 6kJ). Dang I was hoping that this wouldn't be the answer. I don't see how I could get 20kA at 1.8kV, I would need really good conductors.
I guess this answers the rail gun question too. However, I could have sworn someone had success at 800V some where.
Question, assuming I do make a high voltage one, has anyone had success with a triggered spark gap, like how flashes work on cameras? Or are solenoid based triggering better?
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.
Coin Shrinking and voltage?
