Joule Thief

[xee2]

@ jeanna

It seems to me that your research tests show that the base capacitor should be larger than 1000 pF for best performance. Interesting results. Thanks.

[nievesoliveras]

...
could you please get what lead are for witch coil ?

you will have to de-solder the transfo to read resistance between each pins.
if you could also mesure the wires size too, it would be great.
thanks
...

I do not understand your question about what lead are for which coil.
Also desolder the transformer is out of the question. The circuit that now I have is a gift and most not be damaged.

I have a graphic made at the start of this topic with different schematics the first one is the exact way the fugi circuit goes on the pcb but I dont know how the inside coils are configurated.

don't know the schemitic is blowing my brain . .. i gave partially incorrect steps . i edited them out .. What i see it the BASE on my board is the transistor pin closest to the plus battery connector . when you close the battery switch it connects the base to the coil -thru the coil -thru the VR to the positive . the cap  best i can tell you is connected to the base on the coil to the positive  . Has anyone did the pot mod with cap and got very good run time besides me  ?

Dont worry we will try to understand it as well as possible

the most important parts of the fuji jt is the transformer and its transistor.

i would like to know how this T1 transfo is winded relative to the schematic in this post
http://www.overunity.com/index.php?topic=6123.msg155334#msg155334

also, the resistance/wire size values would help to build a same ratio toroidal transformer.

the transformer must not be in a circuit for the ohms mesurement to be valide.

Everybody here does his own measurements with his own flash circuit.

On the graphics there is a schematic that explains the transformer.
The other tests and experiments are on your own.

Jesus

[TheNOP]

@nievesoliveras
that graphics include the data i was looking for.
many thanks

[innovation_station]

i have lots of transformers so i will take 1 apart and mesure the wires as long as they are not miles long ...

i took a few hour break from this to work out some other projects im working on ...

do you find it makes a diffrance if your wires are neatly wound or just clumped togather i personally wonder if it really matters ...

donk know any more ...


ist!


confused 

jesus the first schem on your page is my cam unit but there was never a cap there on any of them  i have bought bout 40 of thease all are the same i found 4 diffrent transformers ...  the ones i use the red ones are the best i have found ...  easyest to get off the board with out breaking them .. 

but none have the .22 cap there ..

the cap that is on my board is for the small transformer ....  it powers that does it not ...?

so i took 1 apart ... looks like 4 turn primary wound on last ..  then at least 2000 turns of verry fine wire ...   so i stripped it all out it was incased in some goooie stuff

but i weighed em both ...  round .5 grams with the gunk on then ... nearest i can tell they are equal masses ...  short fat gage wire longggg skinny wire ... 

sounds like tesla to me !!!!!

[TheNOP]

i have lots of transformers so i will take 1 apart and mesure the wires as long as they are not miles long ...

no need to take it all apart. 
the resistance of the coils, wires size and transfomer dimensions are all that is require.   


something like this can be use for wire size measurements
Electronic-Digital-Caliper