Joule Thief

[xee2]

(12V, 3.5W

JT does not put out 3.5 watts.

[sirmikey1]

stprue,

   I spent days locating toroid cores. 61mm is Wurth MFG  largest, but there is a 120mm available down  below, in 5 different permeabilities... $$$$ ranges. 

Mouser.com's Wurth Ferrite Toroid Cores
"Type W" is Medium Permeability around 800

Edit: Jeanna bought her big ones from here:
Quote: "The number of the very big one in the jeanna's light is OW48613TC from MMI. The $30 minimum is from RTL??? It is on MMI website as one of their distributors."


Here below, you can order any size and permeability price range, but I have not yet found a distributor with good stock.  I can call them if you want,  would be nice to have the biggies.   

Click the permeability range TABs at the top
http://www.fair-rite.com/cgibin/catalog.pgm?THEAPPL=Inductive+Components&THEWHERE=Closed+Magnetic+Circuit&THEPART=Toroids#select:freq6

Mikey

[altrez]

stprue,

   I spent days locating toroid cores. 61mm is Wurth MFG  largest, but there is a 120mm available down  below, in 5 different permeabilities... $$$$ ranges. 

Mouser.com's Wurth Ferrite Toroid Cores
"Type W" is Medium Permeability around 800

Edit: Jeanna bought her big ones from here:
Quote: "The number of the very big one in the jeanna's light is OW48613TC from MMI. The $30 minimum is from RTL??? It is on MMI website as one of their distributors."


Here below, you can order any size and permeability price range, but I have not yet found a distributor with good stock.  I can call them if you want,  would be nice to have the biggies.   

Click the permeability range TABs at the top
http://www.fair-rite.com/cgibin/catalog.pgm?THEAPPL=Inductive+Components&THEWHERE=Closed+Magnetic+Circuit&THEPART=Toroids#select:freq6

Mikey

Hey Mikey,

I get all mine at this site http://www.cwsbytemark.com/ I posted it 800 pages back so here it is again. They have great toroids.

-Altrez 

[tysb3]

@ All

For anyone interested:    http://www.st.com/stonline/products/literature/ds/15474.pdf

[altrez]

JT does not put out 3.5 watts.

Hey xee2
How much should it put out? i know with mine I get less then 1 watt out with a 1.2v 1900 mA battery I think. But i could be testing wrong! Do you know of any good way to verify output of the JT?

@all

How are you guys / gals checking output power?

Thanks!

-Altrez