Joule Thief

[altrez]

jeanna drawing reminded me that often two leads of the transformer are tied together and do not come out as separate connections. In this case I would suggest using the following.

I am not really sure how this would be hooked up. We are not using a pickup coil so once you connect the Toroid to the 2n3055 you have a basic JT then where do you connect the + - of the Ignition coil?

Thanks!

-Altrez

[jeanna]

Xee2,
Did you only add a 20 ohm resistor?

I do not understand how a transformer is a transformer if the leads are connected. I thought it had to be unconnected by wires to qualify as a transformer.

The joule thief primary is connected this way, but this is not a secondary. I am confused about how that is.

Thanks, I guess I have a lot to do today. 

jeanna

[xee2]

@ altrez

Can you explain the black dots on the diagram for me

Dots show if coils are wound in same direction or opposite direction. They should be as follows.

[xee2]

@ jeanna

Xee2,
Did you only add a 20 ohm resistor?

No, I tied two leads of flyback transformer together since they are usually made that way. Perhaps this will help.

[resonanceman]

xee2,

Can you explain the black dots on the diagram for me Jeanna tried but I am still confused. I think what I need to do is take one wire wrap it twice around the Toroid then take a separate wire and wrap it three times around the Toroid. Attach the opposite ends of the wires to each other for the + and then hook the other two up as show.

Is that correct? I have made around 100 Working JTs but I never really spent the time to worry about the windings. I always use a 12 / 12 lol.

Thanks!

-Altrez

Altrez

The black  dots  are " Marks "

Take   the wire  you are going to wind  a JT with .
Mark  either  the  ends   you plan on  starting  with  or the  ends  you planing on ending  with ......... bits  of  tape ........marker  or paint  are all  good ways to mark the ends .
Once   you  have wound    your JT  .......  you simply connect  it  so  your marks match  the black dots  on   the schematic .


gary