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Author Topic: Joule Thief 101  (Read 479872 times)

Offline minnie

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Re: Joule Thief 101
« Reply #2715 on: July 17, 2016, 03:26:32 PM »



  There ya go tinman, EEVBlog 140 and 141. Just sit back and enjoy a fellow Aussie.

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Re: Joule Thief 101
« Reply #2715 on: July 17, 2016, 03:26:32 PM »

Offline AlienGrey

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Re: Joule Thief 101
« Reply #2716 on: July 18, 2016, 11:48:34 PM »
This might interest you, have a look at this video it appears to run for ages on the vid but i'm sure you can pick it apart.

https://www.youtube.com/watch?v=EjJ1iVNHd4s

Offline AlienGrey

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Re: Joule Thief 101
« Reply #2717 on: July 19, 2016, 01:53:33 PM »
This might interest you, have a look at this video it appears to run for ages on the vid but i'm sure you can pick it apart.

https://www.youtube.com/watch?v=EjJ1iVNHd4s

Free Energy | searching for free energy and discussing free energy

Re: Joule Thief 101
« Reply #2717 on: July 19, 2016, 01:53:33 PM »
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Offline MileHigh

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Re: Joule Thief 101
« Reply #2718 on: July 20, 2016, 02:25:48 AM »
The long wire-wrapped cylinder running through the center of the toroidal transformer is almost certainly is a piece of electronics quackery.  Some simple tests could be done to easily confirm that.  However, it would seem that none of the "bench doers" have anything to say about that.

Note that the main toroidal transformer configuration does not resemble a Joule Thief transformer.  It's possible that when the transistor switches off it gets fried by the magnetic energy stored in the toroidal transformer but all of that would have to be confirmed on the bench.

I suppose the most important "armchair takeaway" is that the assumption is that the cylinder running though the center of the toroidal transformer is quackery.  I am sure that Dave Jones from the EEVblog would have something colourful to say about it.

Offline gnino

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Re: Joule Thief 101
« Reply #2719 on: March 22, 2017, 12:37:54 PM »

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Re: Joule Thief 101
« Reply #2719 on: March 22, 2017, 12:37:54 PM »
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Offline Zephir

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Re: Joule Thief 101
« Reply #2720 on: March 22, 2017, 04:15:14 PM »
Quote
The long wire-wrapped cylinder running through the center of the toroidal transformer is almost certainly is a piece of electronics quackery.  Some simple tests could be done to easily confirm that.
IMO not once the wrapped coil would be bifilar. The bifilar coil should collect just the A-field component of magnetic field, which isn't detectable with normal coil around torus (Aharamov-Bohm effect). Even at the case, when normal coil is used, then some magnetic field leaks from toroid, because it's coil represents one loop of winding by itself. After all, the bifilar coil also shouldn't have any inductance according to textbooks - but simple experiment demonstrates, that the inductance of such coil gets even a bit higher, than the inductance of the normal coil (this applies only to bifilars with ferrite core, though). This is because the ferromagnetic domains have some elasticity and they can not only reorient itself (normal B-field), but also change their size (A-field). The source of back electromotive force is the change of B-field only, because the changes of A-field cannot propagate at distance. Once the bifiliar coil doesn't induce the back-EMF voltage and magnetic flux into the circuit, then all energy collected on such a coil must be redundant and as such overunity. The conclusion therefore is, that the every bifilar coil wound around standard Joule-Thief oscillator winding should collect portion of its energy for free - at least in principle.

But IMO the device above linked doesn't utilize bifilar coil, but another effect: traveling waves of magnetization, which were researched by J.N. Naudin, for example. In essence, the A-field of torus generates and sends A-waves of magnetic intensity along the ferrite rod. These waves are scalar, i.e. they're formed with density waves of magnetization of ferrromagnetic domains. The magnetic domains don't change their orientation during it - but size. We can imagine them like the traveling bands of expanding and collapsing magnetic bubbles, which propagate along ferrite rod. The important point is, these waves propagate with speed, which is generally much lower than the speed of EM wave, because they're not powered with B-field magnetic component of coil, but stationary A-field component. At the moment, when the magnetic field changes propagate faster than the speed of EM wave propagation along coil, then the condition for draining energy from thermal fluctuations (magnetic fluctuations of ferrite) gets fulfilled, because the resulting field obtains anapole component.

Anapole field is the consequence of breaking SO(2) gauge symmetry of vacuum considered with Maxwell equations, according to which the magnetic field intensity spreads with speed of magnetic field. Once this equilibrium gets broken, then the vacuum tries to balance the difference by introduction of energy into the magnetic field from its own fluctuations. Anapole field therefore generates magnetic field along ferrite rod into account of its thermal fluctuations, i.e. the heat content. The example of anapoles are for example the eternally rotating magnetic vortices within boson condensates, because in these systems the speed of EM waves gets greatly suppressed to a range of few meters per second. Under such a situation it's not difficult to prepare magnetic vortex, which rotates faster than the density waves of condensate and which can therefore drain an energy into account of heat of its environment.

The even easier to imagine analogy would drain the energy from Brownian motion at the water surface with floater moving along it. The floater indeed silences the Brownian motion of this surface, being unmovable. Therefore the Brownian noise is missing immediately after the floater once the floater propagates faster, than the intensity of Brownian motion can re-establish itself (which is just the speed of surface waves, i.e. analogy of light speed in vacuum BTW). Under such a situation the intensity of Brownian motion after moving floater must replenish itself into account of thermal energy of water. That means, the floater cools itself at the outflow side bellow temperature of water surface which violates II. law of thermodynamics in this way. BTW the whirligig beetles utilize this effect, because during sufficiently fast motion in circles the water surface poses no resistance and it generates no surface waves like the superfluid. In this case, the thermal energy of Brownian motion helps to keep the beetles in motion and it compensates the lost of energy from friction/turbulence. Another example of negentropic phenomena are the rogue waves  (dispersion-less solitons) at the stormy sea, which can also drain their energy into account of their environment.

Apparently this effect can apply at all distance scales and many physical systems, once the system is formed with inhomogeneous environment filled with fluctuations. Then in narrow range of conditions the thermodynamic equilibrium can get broken and its entropic time arrow reversed. The overunity research isn't about plain textbook knowledge - but just about subtleties, which usually evade the attention of textbooks.

Offline stiplanet

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Re: Joule Thief 101
« Reply #2721 on: March 29, 2017, 01:30:26 AM »
hi all i have some project i need someone who know very good on joule thief and boostpack systems to work with him

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Re: Joule Thief 101
« Reply #2721 on: March 29, 2017, 01:30:26 AM »
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Offline tinman

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Re: Joule Thief 101
« Reply #2722 on: May 13, 2017, 05:31:20 AM »
How about a transistor-less JT

Two different voltages across the one component at the same time  :D

https://www.youtube.com/watch?v=bmaEzqw73ww


Brad

Offline iflewmyown

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Re: Joule Thief 101
« Reply #2723 on: May 13, 2017, 03:44:23 PM »
How about Lasersabre's carbon rod no transistor joule thief?
https://www.youtube.com/watch?v=jO55v3fqiO4

Free Energy | searching for free energy and discussing free energy

Re: Joule Thief 101
« Reply #2723 on: May 13, 2017, 03:44:23 PM »
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Offline Magluvin

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Re: Joule Thief 101
« Reply #2724 on: May 13, 2017, 09:26:35 PM »
How about a transistor-less JT

Two different voltages across the one component at the same time  :D

https://www.youtube.com/watch?v=bmaEzqw73ww


Brad

have no idea

Mags

Offline tinman

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Re: Joule Thief 101
« Reply #2725 on: May 15, 2017, 09:54:50 AM »
How i wound my BPC ,using copper ribbon.


https://www.youtube.com/watch?v=EQR6i0qNt4U

Free Energy | searching for free energy and discussing free energy

Re: Joule Thief 101
« Reply #2725 on: May 15, 2017, 09:54:50 AM »
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Offline puneet1984

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Re: Joule Thief 101
« Reply #2726 on: September 28, 2018, 09:56:29 PM »
Hello

Is this thread still active. Have some queries to clear regarding JTs.
Have not seen any activity since 2017 may.

 

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