Quote from: Groundloop on July 04, 2009, 12:00:58 PM

diodes is series is just a way of getting a high voltage
diode. .... the spark gap will go off,
thus putting the capacitor in parallel with the next coil.

Thanks groundloop.

I was wondering why the spark is needed?
There is already a very fast vibration, unless, it is not tuned well, so the spark is going off putting the cap in parallel with the next coil.
I am afraid I don't understand your meaning.
Why does a spark put the cap in parallel with the next coil?

QuoteIf you want a more powerful Joule thief, then just buy one of the attached toys.
The neon sign runs from 4 AAA batteries. (6 volt.)

Tee hee. 
I already do...
I have run a fluorescent tube for 5 hours from 1.2 volt AA battery, and my Joule thief--- off the secondary. no doides , no spark either... Neons too. I have several that light them right up!

I am wanting to get the level one above where I am. The one depicted in the final circuit with the 4 caps in parallel that lights those lights.

Of course, I am assuming those lights are the 100 watt incandescent ones from the video. Maybe they are not. Maybe I have all I need.

thank you,

jeanna

Jenna,

Look at the attached drawing. From the Joule Thief you get pulsed direct
current on the output of the diode. This direct current will charge up the
capacitor. When the capacitor reaches high enough voltage then a spark
will fly between the ends of the spark gap. This spark will create ions and
plasma in the air, thus reducing the resistance in the spark to near
zero Ohm. This will allow all the charge in the capacitor to be dumped
into the transformer primary. When the charge in the capacitor is gone
then the spark vanish and the cycle repeats. A spark gap is superior to
all (well most) electronic components when it comes to switching high
voltage at high speed.

Groundloop.

@xenomorphlabs,

I been busy making a small circuit just to test out some stuff, as you can see in my post to Jenna.
I have made a small coil (500 turns) and will use a neon toy electronic to run the coil
and spark gap. That is all I have time for right now. Fun to build stuff. :-)

Groundloop.

Quote from: samedsoft on July 04, 2009, 11:35:24 AM


   I dont know Russian indeed.. We need a Russian speaker to translate the notes on the picture..

I translated it with girlfriend
Here you go :

Thank you xenomorphlabs!! - and girlfriend!!

This makes a difference

The "joule thief" core is only iron clad and may not even be a toroid, (the 2 dots make me think it is) so he may NEED to have that SG1 just to get enough oscillation added to his joule thief.

The T2 is iron core and oriented to 4 high capacity capacitors. This might be the only part needed beyond a well tuned joule thief with secondary.

My secondaries more often than not produce ac, so for the reason groundloop described, a spark would not be necessary for them to work.
I could just add the next level iron core transformer and see.
An iron core with 4  high voltage caps in parallel.
This must be another tank.
(I don't ever get anything on a cap at that place without a full bridge to rectify it all.)
I wonder if iron core might be ferrite or even ferrite toroid?

I usually start small. I will add one cap and see.

Thank you,

jeanna