Wireless power transmission using Joule Thief

[pese]

Its nothing new, at this cicuits.
Npthing OU
Nothing wireles
Nothing mystic".




This JT inverters (like this)
ARE NOTHING ELSE , as
High Frequency Oscillators. !!!


(even with more power on it, you can drive, energy saver lamps , Neon Tubes  even normal filament 110 or 220v bulbs.
( i done this 50 years ago) this knowledges is very old--

Because this is RF (radio frequency, YOU MUST SEE the Strip as an antenna.

so the capacitance oth them to the enviroment ist also an
resistance "" Dont forget it. 
So, the Diodes in serie wiöl light.
If more power also Bigger loads

Pese

[synchro1]

I believe it's time to resurrect this thread.

http://www.youtube.com/watch?list=PLO6FJVqlxatcOftfdvK0q8wPuLUUZ_Mxh&v=mhHhV4qutyA&feature=player_embedded


Sohei Thoth Has an increabile 3rd. experiment video! This one's ground breaking:



http://www.youtube.com/watch?v=llNbX5z7aDA&feature=plcp

[TinselKoala]

Yes, very  interesting, nice work Sohei. (I don't see any great cracks opening up in the ground, though...)   

The coil/LED combo is a system that receives power by picking up the oscillations from the transmitting coils. The LED rectifies this power and allows half of the received waveform to light the LED; the other half is blocked. The polarity of the receiving coil +and+ the polarity of the attached LED will determine the brightness, the effect on coupled inductances and so on, especially if the _transmitted_ waveform is asymmetrical wrt Zero volts.... as all JT oscillators are.  So the coil has a preferred polarity wrt the LED and the transmitted waveform and when you turn the coil around it's trying to push the other side of the asymmetrical waveform thru the LED, so the brightness and mutual coupling behaviour changes. I _think_ that if both the coil orientation +and+ the LED hookup were reversed, the result would be the same as with the original setup, that is, no change.

The insertion of the coil into the other coils causes all of the  inductances to change. Sometimes this can bring the system into true resonance, sometimes it can move the system further away from true resonance.

It might be possible to improve the performance of the receiver by putting a cap of the right value across the LED, so that coil, cap and LED are all in parallel. I'd start with just a few picoFarads and work upwards.

I just shot a video that might be of interest on this topic. It's uploading now and will be done in a few minutes, at
http://youtu.be/8b7ABdJQssc

[synchro1]

Thanks to TK for his video demonstrating the increased range of a single wire wireless receiver coil, with the addition of a resonant capacitor. Sohei's wireless reciever coils are bifilar high voltage and generate resonance from their own self capacitance. Sohei's reduction in input from multiple reverse facing wound receivers is "Richter" scale ground break! The posiibility of consecutive concentric wireless receivers, each one generating light while reducing primary input is a truly awesome result! Thanks to Sohei Thoth.

[TinselKoala]

Bifilar high voltage? Are you sure you don't mean "multiple strands"? The term "bifilar" is almost as misused as the AC coupling function on a scope. I'm not at all sure that a JT would work with two true bifilar wound coils, but I'm willing to find out.

And if the coils are "high voltage" why does the LED survive? In the typical JT circuit, the "spike" of voltage that we channel to the load (LEDs, another JT, whatever) is produced by the collapse of the magnetic field in the coils we are using. To get "high voltage" by my definition in this spike.... six hundred, a thousand volts or more.... the coils need relatively high inductance. To achieve the high inductance in an air core coil you need lots of wire and large physical size. My "10mH" neon JT uses a coil set smaller than the size of my thumb from knuckle to tip, and makes well over 600 volt spikes on a depleted aaa battery input. You will not see that kind of HV from air-core coils unless they have a lot of wire in them. Tesla bifilar coils have _reduced_ inductance, in fact can have Zero inductance if properly done. Yes, the interturn capacitance is increased for true Tesla bifilar coils, but unless the coil is very carefully constructed this interturn capacitance stores much less energy than the magnetic field does. The great advantage of air core coils is that they do not have a saturable core, so "in theory" the magnetic field continues to grow with increasing current input, it does not "top out". But to take advantage of this effect fully, to make really  high voltages,  you need the physical size, and the construction of the coils themselves needs to be carefully done.

I am not "knocking" Sohei's work at all, it is very interesting and I'm glad he's doing it and I don't even want to influence him (very much).  But if you want to understand what a high-voltage bifilar coil really is _according to Nikola Tesla who invented and patented them_ you might like to take a look at my videos comparing ordinary pancake coils with Tesla true bifilar coils of the same amount of wire and physical dimensions.  I can put NE-2 bulbs and LEDs in series, light them ALL with only one wire hooked up..... that's high voltage, and I'll leave it to you to explain how I can put a 90 volt neon in series with a few LEDS and light them all up (one wire, remember) without blowing anything.
Similar changes in current drain to what Sohei shows in his low power "wireless" system were also noted by me in my wireless power transmission system using multiple receivers.... months ago. But because nobody is calling them  _groundbreaking_.... I suppose the significance has gone unnoticed. And because I use, generally, Single-Turn coils for both transmission and reception, the issue of winding direction is moot.

And the little commercial inductors I pulled from TV sets and use in my JTs have the same relationship as Sohei's JT air-core coils: opposite winding directions. If you hook one of the coils in with one polarity, the other coil has to have the opposite electrical polarity for the induction effect to take place and the JT to work. Reverse one of the coils, and you have to reverse the other one too, electrically, for it to work again. 4 possible configs, 2 work and 2 don't, and of the 2 that do work one may be slightly better than the other.

Demonstrations that do not show variations in conditions are demonstrations, and are fine for that. An experiment, however, varies some condition under the experimenter's control, and examines the behaviour of the system to see what changes result from the manipulation. Shoei is showing this kind of experimentation when he shows the receiver coil in various orientations. For full effect and interpretable results, he should also show the coil in both orientations +and+ the LED in both orientations: four conditions. He is only showing two. If there is no effect from changing the LED polarity, that would be good to illustrate. If there is no effect from adding an appropriate capacitance, that would be good to illustrate. "Null Effects" --that is, the absence of an effect due to a particular manipulation -- are just as important as positive effects, sometimes even more so. In my video showing the random coil tuned by added capacitance, that is the only point I am making. I am not ready to "take over" and do the experiments I think Sohei should be doing, that's up to him. However as I see points that I think might need clarification, I'll continue to try to point them out, and I think that a lot of the work I've done in the past is relevant to what he's doing now.