Joule Thief

[resonanceman]

I, know I really need to expand my cap library

If  you  only want to get a few, the ones  I  keep handy  are  125pF     .1uF  and  1uF
These    will  show you  alot about what is  going on ........sometimes changing caps  makes  little  difference  over all .......  when it seems to make  a difference  I  get out more caps   to try to fine tune a little

gary

[WilbyInebriated]

Volume discounts available!
I particularly like this one


Actually thanks, but...

What I need to do is wrap a toroid with as many winds as I can fit. I did this with a little one, a 3/8" one with 74 turns secondary and got 68 volts. That would lite a 20 led spotlight  if I wanted to make one of those. Hmm not a bad idea.

I should do that with one just a bit bigger. Xee can light a tube with a 2 inch toroid wound like that. I guess there is no end to the things left to try.

thanks,

jeanna

yes, light sabers are cool 

i understand there is an affection here with the toroid, i guess what i am trying to say is that toroids are not the only core types available and for high freq. you hardly see them used.
i know i'm stating the obvious, but there seems to be an obsession with toroids save the couple aircores and the helmholtz efforts.

@all
do your toroid jt's perform better than an e core, barrel core or air core? more light? less draw?
i'm asking this because i don't see the toroid performing better in my jt's.

if the answer is "toroids are cool", i guess i'm down with that 

[jadaro2600]

Toroids are a pain in the rear.  They may be functional, but they have a sort of time-consuming power to them.

[nievesoliveras]

Jesus

The  schematic   would be  a basic  JT   

Here is a picture of the connections

The yellow wires  are my normal  wires for  connecting  my coils
The 2 yellow on the right  are connected to the low voltage coil ..... ( heavier wire )
You  can see the other  yellow  wire  connected to the high  voltage winding  ( thin wire )
The  white wire  replaces  twisting the  2 wires together on a regular JT
Sorry the black wire is  so hard to see ....... it is  connected  to a  tab on the  core .......... ( grounded ).   
The  red wire  coming out of  the  MOT is the secondary ......it is internally  grounded   on the other end ........


I hope you  find  a MOT




gary

Thank you @resonanceman !

It is difficult for me to relate words with a circuit, but because I dont have a MOT to try and ask while building, I will wait till I get one to make a new circuit relating the JT with the MOT.

Jesus

[resonanceman]

Thank you @resonanceman !

It is difficult for me to relate words with a circuit, but because I dont have a MOT to try and ask while building, I will wait till I get one to make a new circuit relating the JT with the MOT.


Jesus

WHen  you get a MOT I think you will find it easy to make a JT  from it
If  you  have some problems  let me know


gary
Jesus