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4hv.org :: Forums :: Tesla Coils
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TC at 12V?

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dingo27
Sun Apr 27 2008, 04:22PM Print
dingo27 Registered Member #890 Joined: Tue Jul 10 2007, 10:06PM
Location: Slovakia
Posts: 180
Hi coilers, i want to build my third one ( amazed ) TC... today i just wind the secondary, for primary i dont have wire so it must wait some time... It is winded with 0.1mm wire (that is 0.01cm, i dunno what it is in inches...) and it is 22 cm long, diameter 4cm on PVC tube, it has 550ohms (i know... too bad)...
I want to drive it on single 12V (but 10A) power source (it is switching source btw)...

for it i want use some mosfets 2 or 4, connected to half or full bridge. The ones i currently have are irfs630A, will they be good?

And ... i need some principal schematics for oscillator etc, because i dont know how can i get good frequency for resonation (no oscilloscope) and i dont have any sine generator either.

Ideally mosfets could switch 12V, but i can get higher voltage only with multipliers and transformers, but they are too weak to provide high energy for TC...

can somebody help?

I dont have primary plans either, so it will be something like do and try, if no - try again.
(hope you understand me cheesey )

i am sorry, i posted it to wrong site... plz. move it to TC :) thanks
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Kizmo
Sun Apr 27 2008, 05:16PM
Kizmo Registered Member #599 Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
Maybe Class-E SSTC? It would have reasonable performance with just 12V..
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Arcstarter
Sun Apr 27 2008, 05:58PM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Can someone direct him to the skori sstc? I do not know were to find it. If no one shows you were it is just google skori.
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dingo27
Sun Apr 27 2008, 06:42PM
dingo27 Registered Member #890 Joined: Tue Jul 10 2007, 10:06PM
Location: Slovakia
Posts: 180
Arcstarter wrote ...

Can someone direct him to the skori sstc? I do not know were to find it. If no one shows you were it is just google skori.
if you mean that guy from hungary, he had 24V TC, but i have only 12V max PS ... :(

and, i know RayeR's TC schematics (that is one of my TCs)
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Akika
Sun Apr 27 2008, 07:08PM
Akika Registered Member #1449 Joined: Sun Apr 20 2008, 04:10PM
Location:
Posts: 4
Here is the link: Link2
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dingo27
Sun Apr 27 2008, 10:09PM
dingo27 Registered Member #890 Joined: Tue Jul 10 2007, 10:06PM
Location: Slovakia
Posts: 180
Thanks a lot, akika !

I am working out on translation (even Hungary is our next state) but did somebody tried schematics?

as i was looking on it, i probably found mistake at:

Minitesla12V


that 5 diodes on down-center (1N4007) 4 are connected serial and one (bottom one; D10) is connected anti-serial to anothers... is that good or just mistake of autor?
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Steve Conner
Mon Apr 28 2008, 08:59AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Yes, the backwards diode is probably a mistake. So is posting images over 400 pixels wide: edit your post to see the code I used to fix it.
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flannelhead
Mon Apr 28 2008, 12:42PM
flannelhead Registered Member #952 Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Is the yellow-framed part in the schematic some kind of an "optional" part?

And about grounding, do you think the base current spikes will kill the 555 if the circuit isn't grounded to an earth ground?
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Steve Conner
Mon Apr 28 2008, 01:07PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
The yellow framed part is an "amplified zener" that he suggests as an alternative to the two series 1k 1W resistors. I don't know a word of whatever language it is, but I imagine the transistor needs to be on a heatsink.

You're unlikely to kill anything with "current spikes" (whatever those actually are) as long as you connect all grounds in the circuit solidly to the same point. Grounding half of it to one thing and the rest to another thing is asking for trouble.
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flannelhead
Mon Apr 28 2008, 01:59PM
flannelhead Registered Member #952 Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Does anyone know a good alternative for SF18? It doesn't seem to be very common.
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