Joule Thief

[jadaro2600]

@altrez,

You may try twisting your two primary wires together, winding while spreading the turns evenly around the toroid.  Then place your pickup coils over this if you have to.  You may have a high permeability toroid.

What we need to use is low permeability - as someone pointed out a few pages back.

[xee2]

@ altrez

Magnet wire is covered with clear insulation. I assume you have removed the insulation where you are making contact with the wire. If not, that is most likely your problem.

[Cap-Z-ro]

Posted by Hoptoad on another thread...may be applicable to the jt.

" Perhaps this is a little off topic, apologies in advance, but it relates to efficiency.

In an article written by Nikola Tesla entitled "The problem of increasing human energy", first published in June 1900 by Century Illustrated Magazine, on pages 196 and 197, there are a few paragraphs devoted to the value (or not) of iron in electrical current generation and transmission.
The following quote is word for word, but the bold highlighting is my edit.

Quote:

"Unless we should make a radical departure in the character of the electric currents employed, iron will be indispensable.Yet the advantages it offers are only apparent. So long as we use feeble magnetic forces it is by far superior to any other material; but if we find ways of producing great magnetic forces, then better results will be attainable without it.

In fact I have already produced electric transformers in which no iron is employed, and which are capable of performing ten times as much work per pound of weight as those with iron. This result is attained by using electric currents of a very high rate of vibration, produced in a novel way, instead of the ordinary currents now employed in the industries."

End Quote:

With rare earth supermagnets such as NIB's now becoming cheap and commonly available, Teslas comments above, should be given greater attention when contemplating the design of more efficient motors and generators.

Ironically, Neodymium Iron-Boron magnets (NIB's) do contain some iron. But Tesla wasn't commenting about the material characteristics of the source of a strong magnetic field, he was referring to the materials of the inductive coils/cores and housing assembly used for generating electric current from the strong magnetic field and also transmitting it to a load.

Particular attention should be given to Tesla's comment on the use of electric currents with a high rate of vibration (frequency) for use with his ironless transformer.

Regarding motors, the most efficient motor /generator developed for the "civilian" world thus far was developed by the CSIRO and ultimately produced in 1996-7 for use in the Australian Solar Car Challenge entry vehicle called the "Aurora".

Note the ironless specs of the motor in the pdf link below.

http://www.totallyamped.net/adams/AuroraSolarCarMotor1997.pdf

Cheers   ...  KneeDeep.... and who among us, would argue with Tesla? "




Regards...

[gadgetmall]

@all
     Just for your Information . RGB leds will not work on a Jt normal or secondary  as it stands . . The reason why is they RGB leds Have a MicroChip in them and Malfunction on a Jt . . I have The cure ! I have Played with them and have ran them fine with a modification I have .Same goes for any Chipped Led  be it Blinking or rainbow RGB's 


Regards
GADGET 

[jadaro2600]

@all
     Just for your Information . RGB leds will not work on a Jt normal or secondary  as it stands . . The reason why is they RGB leds Have a MicroChip in them and Malfunction on a Jt . . I have The cure ! I have Played with them and have ran them fine with a modification I have .Same goes for any Chipped Led  be it Blinking or rainbow RGB's 


Regards
GADGET 

Care to share?