Joule Thief

[crowclaw]

One way to make a resonating coil more efficient is to reduce the self capacity.

Self capacity will make a current show up on the other end of the coil that doesn't help in producing a magnetic field. Coils should be slow in letting the current through. The current should have to force it's way all the through each and every winding creating a magnetic field as it goes. It builds up momentum, so to speak, in the magnetic field. When you stop feeding the coil current the field gives you that kick on the tail end, it gives you back all the work you put in to building the field but it does it quicker than the time taken to build it.

Tesla said in his Colorado Springs Notes that reducing the self capacity of his coils was essential. He started winding his coils with a spacing between the the windings. Using wire with a thick insulation with a low dielectric constant would work also.

I read in an electrical engineering book for radio design that a spacing of at least half a wire width between turns and at least 1 and a half wire width spacing between the core and the turns was a good rule of thumb to reduce the self capacity.

(It makes me wonder when I see people building Tesla coils on youtube with the turns as close together as they can possibly be; did they not get that memo?)

Good point, for all of my past JT type experiments I have used insulated stranded hook up wire... even a length of coaxial aerial cable in one case! and not to forget a wine bottle used as a coil former (seasonal joke), domonstrating how these circuits can work using various materials.  I posted pic's of these some time back. Take a look at tuned circuits that operate at vhf and uhf frequencies the inductors are open air and the turns are spaced appart, to achieve peak performance at their resonant frequencies. The turn spacings are often  squashed up a little or opened out!

[Pirate88179]

Pirate,

Two Jobs !
What? Are you paying back Credit Cards like me?

Actually, child support arrears.  (Which are totally bogus!) The state says I will have to pay up to 2 years after I am dead.

Bill

[Doug08]

Thanks

[ltseung888]

Dear All,

I do appreciate the excellent work by many on this thread, especially those from Bill and Jeanna.

I have used the two oscilloscopes to simultaneously display Input and Output Power from the enhanced Joule Thief circuits.  The conclusion is that overunity can be achieved via appropriate tuning.

I shall bring a few of the gadgetmail type prototypes to USA and do some presentations at UC Irvine in mid-November.  Some of the theory information is attached.  The same information will be presented in a coming workishop on Oct 9 at Hong Kong University.

Overunity is real.  Energy can be lead-out or brought-in from the surrounding.  The Law of Conservation of Energy is NOT violated.  A less than USD10 enhanced Joule Thief device can demonstrate that.  Please keep up the excellent research.

Lawrence Tseung
Director
Help Seedlings Innovate Foundation Limited

[ALVARO_CS]

@The Observer \ and anyone willing to hear my rant .

As far as resonance goes most people have only scratch the surface , i will make a new topic soon on the physical resonance property , something that is hidden because of the way we use electronics to artificially tune the freq .

All mater has a specific freq , like any conductor has a freq , depending on the amplitude of the signal , will either make it vibrate or destroy it , like the crystal glass broken by sound , there is the half as way of doing it like the mythbusters shooting any freq at any amplitude and looking at the results , that way they have as much chance the win the lottery jackpot ...

This could have been done under 5 minutes , first make the crystal sing with you finger and reproduce the same freq , and voila ...

All i am saying is that any solid mass of mater will react the same to the presence of it fundamental freq .

We tune our circuit with caps and resistor , and never look at the wire ?

I bet there is a way to find the freq for each piece of wire ...

Anyway i will eventually star a tread .

And also put the same type of strings on both guitars electric strings are not made to be loud they are made to make good eddy current for the pickups and are usually smaller other reason for less volume . I know you are a fan of resonance but the key is not the resonance chamber , its resonance it self . The guitar is a great tool for understanding resonance but only a tool . Tune all the strings to the same note pluck one of them and all of them will sing and start moving that is the answer more or less depending on size , now imagine all the strings being the same size and tuned the same note pluck one again they will all vibrate as strongly , using electronics is and artificial means of tuning circuit like small strings in the first experiment it vibrates but barely .

Mark

@Mark
I´m one who is VERY interested in "willing to hear your rant".
I agree in that any material / shape has its own resonant freq.
I also think that, shape also has a great significant meaning in terms of resonance as the electron-motion path (spinning-orbit-vortex) is not an aleatory function but rather a mathematical-geometrical constant in the universe.
PLEASE start that thread !
I have read all the "platonic solids" thread and I´m still hungry !
Thanks so much for your generous sharing !
regards
Alvaro
Edit
all these comments are related to my research about coils/shapes and the intuitive feeling that pushes me to revise the established concept of a coil as a loop of wire.