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 #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
I am trying to build a Tesla Coil with ignition coil or flyback now.I can't afford a NST.I build my coil according to the instruction on Deepfrienneon website.But I can't see any spark.
I also tried to build this but it dosen't work.
What I have now is several flyback and ignition coil(and driver),several high voltage cap(three 0.1uF 8kv,two 2700pF 27kv),3 secondary winding(D:110mm 1000turns,D:20mm 2200turns,D:50mm 1800turns) and some basic components.Can I build a very small SGTC from these things?I can't afford a NST.I can't find MOTs either.
I have some(more than 100)working power MOSFET and IGBT found in a trash box at a school lab but SSTC is too complex for me and I can't find UCC37321 IC.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
If you still have the setup that you linked to - I'm not surprised it didn't work with 2N3055's ... far too low voltage rating, for an ignition coil 300 to 400V is a MINIMUM. SO, replace the 2N3055's with one high-voltage transistor as found in flyback circuits in TV/Monitor (HOT, horizontal output transistor) OR I would drive a single igbt directly from the 555 output.
The two 2700 pF in parallel sounds like a good start for a primary capacitor.
Registered Member #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
Sulaiman wrote ...
If you still have the setup that you linked to - I'm not surprised it didn't work with 2N3055's ... far too low voltage rating, for an ignition coil 300 to 400V is a MINIMUM. SO, replace the 2N3055's with one high-voltage transistor as found in flyback circuits in TV/Monitor (HOT, horizontal output transistor) OR I would drive a single igbt directly from the 555 output.
The two 2700 pF in parallel sounds like a good start for a primary capacitor.
I'm not using the driver describe on this webpage.I build another driver using IRFP3415.The spark from my ignition coil driven by this driver is longer than the driver on the webpage.
I have read some webpages already but sitll don't know what to do to properly adjust by coil.
Should I use diodes to rectify the output of the ignition coil or not?
BTW,what is the diffrence between these two circuit?which one should I use?
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I doubt there is an appreciable difference, but the second is what i always used. The spark gap is directly in parallel with the HV source, so it is impossible for any voltage higher than the spark gap's breakover voltage to get to the NST. At least, that is what i always saw. But really, that is not the case, there are still stray inductance and capacitances before the spark gap and in the spark gap.
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.
How to build my first spark gap tesla coil with ignition coil or flyback
