Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 48
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
No birthdays today

Next birthdays
05/07 a.gutzeit (63)
05/08 wpk5008 (34)
05/09 Alfons (36)
Contact
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.
Forums
4hv.org :: Forums :: Electromagnetic Projectile Accelerators
« Previous topic | Next topic »   

Crash and burnt coilgun

Move Thread LAN_403
Dalus
Sat Jul 07 2007, 03:15PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
I'm using tree per leg fot a higher voltage rating, just to be safe. Almost evrything I build is overrated. It's always handy to overbuild it since this psu can output a voltage in the KV range, at least when running at 30+ volts. Two of your diodes in series would do fine if you're ain't going to use it at higher powers in the future.
You can also build a voltage doubler if you're in need for even a higher voltage.
Back to top
Speedsoda
Sat Jul 07 2007, 03:37PM
Speedsoda Registered Member #878 Joined: Wed Jul 04 2007, 08:01PM
Location:
Posts: 6
Dalus wrote ...

I'm using tree per leg fot a higher voltage rating, just to be safe. Almost evrything I build is overrated. It's always handy to overbuild it since this psu can output a voltage in the KV range, at least when running at 30+ volts. Two of your diodes in series would do fine if you're ain't going to use it at higher powers in the future.
You can also build a voltage doubler if you're in need for even a higher voltage.

I'll probably stick with this voltage for now, I think there is a bigger need for more capacitance... But still, say I want to double up the voltage, is this what I use? Thanks a great deal for all the help, really! I'll go build a rectifier and see what happens... That mosfet on my flyback driver circuit that I said was broken did indeed heat up very fast, but now it magically works again. Weird. confused
Back to top
Dalus
Sat Jul 07 2007, 04:46PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
The voltage doubler circuit is ok to double the charging voltage, but the diodes should be rated twice the input voltage. The caps need to be about 4.7 nf because they'll get charged en discharged rather quickly by the high operating frequency.
Back to top
Sulaiman
Sat Jul 07 2007, 06:56PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
Just looked in on this thread, sorry for the late reply.

IF you parallel the outputs of camera flash chargers you CANNOT series the inputs because
The -ve battery connection is also the +ve capacitor connection
The net result will be to put the entire 12V (or whatever) across ONE charger ... POOF !!
Back to top

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
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.