Joule Thief

[xee2]

@ all

Before everyone deletes everything, let's see what is really happening. It is now 2AM in Germany and I suspect Stefan is sleeping and has no idea what is going on. If things still look rotten tommorrow, then everything can be deleted then.

EDIT: Well, I guess he wasn't sleeping since he posted at the same time I was posting.

[hartiberlin]

Please read my last post.

Please Gadget and Bill stay here.

Many thanks.

Regards, Stefan.

[xee2]

Well, I hope Bill will be back. In the mean time Walmart is selling 50 filament bulbs for $1.99. I think this is the regular price, not a sale. But, they will probably go fast. These are 1 watt bulbs with 3.2 ohms resistance that will light using only a 1.5 volt battery. If you want some, better buy quick.

[Groundloop]

Stefan,

I think you did the right move. This is a free energy forum and not a skeptical forum.

Sometimes the research and posts will be on the edge of normal science. I also think
this is normal in this kind of research. I'm all in for free speech and I think that skeptics
also have a place in this forum, but NOT as moderators! Members of this forum has done
a whole lot of research using their own money and time. They are the "back bone" of this
forum and deserves respect, not ridicule.

Open letter to Bill.

Bill, it is my impression that you have done a very good job moderating this thread. Over 10.000
posts and you have managed to stay on topic and only filtered the "chaff" away. I will ask you
to reconsider not leaving this thread and this forum. If you leave then "they" have won.

Open letter to Albert.

Please reconsider staying. I'm a firm believer in open source and generally think that patenting
is not a solution for a free energy devices. If you decide to leave then i will support you effort
anyway by email etc. But think about it, if we manage to get this right and "stumble" over
some sort of energy that are unknown, then the struggle was wort it.

All,

I think it is important to have fun. Electronic hobby is a great hobby where you can see
the result right away, be it the "magic smoke" or a running circuit. The mainstream science
will never do any research like we do. We are pretty much alone in this research.

Sincerely,
Groundloop.

[hartiberlin]

Hi Stephan,
Some of us have been working on many of these elements you speak of.
The ferrite toroids have a lower limit to their frequency.
As the frequency of a joule thief goes down, the voltage goes up, so, to light a cfl, it is necessary to have one that will vibrate at 1khz-12khz.
I have not found the lower limit yet, but certainly, 50khz will bring the overall voltage down to the point where the cfl will no longer light.
In a higher frequency toroid, it will be necessary to start with a higher voltage to light the cfl.

I see,
okay,
surely at 50 Khz the inductance of the primary winding
plays a major role
and you can only increase the current through the primary
windings and thus making the induction voltage bigger in the secondary windings,
if you make the L lower.

So just use a lower turn number for the primary windings..

Maybe just only 2 to 3 windings, so it has low
R and low L, so the RL timeconstant for this load
resistor of the JT transistor is small and it could run at 50 Khz.

But then you have to tune it right, so that it really
runs at this high frequency, otherwise it will burn up
the transistor, if the frequency gets too low...
(if the On-time is too big, too much current will flow then)

Thank you for this information. You just saved me a lot of time  as this was next on my list.

jeanna

Well yes, you can just hack such a PC modding CCFL inverter,
which is normally made for 12 Volts and modify it for 1.5 Volts usage.

You can remove the cap at the secondary coil of the transformer,
as this flattens the pulses, which we don´t want.
Also you can tune the resistors a bit, so the transistor gets
different basis currents, so the circuit will already work with
lower voltages.

Hope this helps.
Regards, Stefan.

P.S:Has anyone yet made a JT with just a IRF 840 MOSFET
and no transistor  ? Can you post a circuit diagram ? Many thanks.