Joule Thief

[xee2]

@ jeanna

A bigger toroid produces a higher output voltage than a small toroid with the same number of turns (assuming both are made of the same ferrite material). The voltage is produced when the transistor turns off and the magnetic field of the collector coil collapses. The higher the inductance of the collector coil and the faster the transistor turns off, the higher the voltage produced will be. I have done a number of tests that show this is true. But, I am sure you will want to verify it for yourself.

[Mk1]

@xee2

Not really.My test showed the opposite.

[gadgetmall]

@Pirate . you Don't Believe In Ou . What is it that i have UU
I just posted a Short Vid of My 300 bright Leds and and 100 watt CFL runnuing from Fugi .the music on the end is one of 7 songs i wrote and copywrited . Im on the Ovation Guitar . recorded Live Halloween Night at MEE MOOS a Big Club having a big Halloween party !! http://www.youtube.com/watch?v=4YAQ9MSrq5Q  I gave Credit to you Pirate .

[xee2]

@xee2

Not really.My test showed the opposite.

@ Mk1

Hmmm. Strange that we get different results.

[jeanna]

@ Mk1

Hmmm. Strange that we get different results.

Xee,
I gather you did these experiments some years ago?
It would probably help a lot if you could provide some numbers and specs or pics (well not pics from years ago, but new pics of old trials?)
You appreciate consistency, and having one more person making consistent measurements and tests will be helpful. (your advice IS helpful, but this could be more.)

Thank you,

jeanna