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 #1262
Joined: Fri Jan 25 2008, 05:22AM
Location: Maryland, USA
Posts: 451
Well for one thing the caps are rated to 330 volts normally and I've seen a few that are 180uF, a few that are 80uF however the bulk are 120uF or 100uF. I guess they all average out to roughly 120. Given that you have a total of 176 cameras if you charged all the caps to 330 volts you'd actually have around 1,150 Joules.
I've made a bank of 10x 120uF 330V flash caps in parallel for 65.34J, it will fire a little iron rod at several meters per second as part of a coilgun and it will vaporize a good bit of aluminum foil if shorted across it.
I'd say a CW multiplier would be a great idea however anything done with more then five of these caps should be treated as a lethal shock hazard if they are fully charged. If you were to get maybe 150 joules at a couple kV you really might be able to use the thing like a defibrillator, but this would be a sure way to earn a darwin award. Can crushing, wire exploding guns, electric fishing, all of that is possible with a big-@$$ load of photoflash caps. It would also be cool to discharge them into some uber huge step-up transformer and get a crazy high voltage, crazy high current pulse.
Registered Member #617
Joined: Fri Mar 30 2007, 07:29PM
Location: Buffalo NY
Posts: 49
Backyard Skunkworks wrote ...
I'd say a CW multiplier would be a great idea however anything done with more then five of these caps should be treated as a lethal shock hazard if they are fully charged. If you were to get maybe 150 joules at a couple kV you really might be able to use the thing like a defibrillator, but this would be a sure way to earn a darwin award. Can crushing, wire exploding guns, electric fishing, all of that is possible with a big-@$$ load of photo flash caps. It would also be cool to discharge them into some uber huge step-up transformer and get a crazy high voltage, crazy high current pulse.
I like the idea of a CW multiplier but I never knew that it could be done with polar caps...I think i might try some can crushing/coin shrinking with them as well, I just destroyed a pair of needle nose pliers with 3 720uf banks in parallel at 270 volts....So i am beginning to realize that these are much more dangerous than I originally thought.
Conundrum wrote ...
hmm.. well it might be possible to make a MMF (Multi Monolithic Flash) module, for high speed photography and/or laser experiments. The idea here is to solder the flash tubes together in a circular array with a reflector behind them, with wires wrapped around the tubes connected to your HV trigger.
I like the flash Idea I dont think i would use it to cook but i might want to try going blind for a week at some point just for fun.... The geiger counter also seems like a cool experiment. I think im going to get back to soldering the capacitors together...I might also try to build a mini telsa coil from a couple of the camera transformers. I think I will get about 100 more cameras tomorrow (im going to go home a different way). I will update you guys with some pictures of my progress and the new cameras if i do. Thanks so much again for all of the use full ideas and feedback.
Registered Member #1262
Joined: Fri Jan 25 2008, 05:22AM
Location: Maryland, USA
Posts: 451
halomaster2004 wrote ...
I like the idea of a CW multiplier but I never knew that it could be done with polar caps
If your using AC input then you can't build a CW with 'lytics, however I was thinking pulsed DC input in which case I think you can. Someone correct me if I'm wrong here.
EDIT: I've broken a couple xenon tubes prying 'em out, I can't imagine de-soldering would even come close to breaking them.
EDIT: Electrolytic caps do work in CWs, as explained by Shaun.
Registered Member #690
Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616
Actually BS, polar capacitors can be used in a CW system. In fact I'm also pretty sure that pulsed DC will not work at all.
The only thing here is you cannot short the capacitors, as then they fully discharge at very high current through the diodes. A limiting resistor is usually used here to limit current. On the CW system Mates made, his strings of 1n4007s took quite a few full discharges and kept on going, but you may not be so lucky.
Registered Member #1262
Joined: Fri Jan 25 2008, 05:22AM
Location: Maryland, USA
Posts: 451
Looking at how a CW is put together I think pulsed DC would work aswell, because the latter stages seem to be getting charged through diodes. Wikipedia claims this is true aswell "The CW is basically a voltage multiplier that converts AC or pulsing DC electrical power from a low voltage level to a higher DC voltage level."
Looks like its the single stage voltage doublers like the one described in the first part of the 4hv wiki's CW page that cant use 'lytics.
Registered Member #617
Joined: Fri Mar 30 2007, 07:29PM
Location: Buffalo NY
Posts: 49
Im going to try right now with a couple capacitors at a low voltage. If that works Ill post my results. Also I received thanks to my cunning abilities as a student about 40 or 50 more cameras today on an alternate route home. Tomorrow I might go home from school yet another way!
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
How much of them are you going to get??
Another idea: Rip all their inverters off the boards and wire some in series and some in parallel. Then make a "disposable camera tesla coil" like I did:
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.
136 Used Disposable Cameras
