Joule Thief

[nievesoliveras]

@mk1

I made some changes to the windings in order to understand better the correct way the wire is wrapped around the toroid.  I could not follow the wire turns on the original graphic.

I paid attention to the wire starting in one direction and ending on another direction.

Is this correct?
I will use an @mk1 toroid coil on a switching circuit I am planning.

Jesus

[xee2]

@mk1


This is my attempt to make this drawing clearer. Is it correct?

[Mk1]

@all

The mk x2 are for the jt side of things , so you get a double pulse on each side, so 2x faster, i used it so i could get the same voltage from the pickup coil with a bigger resistor at the base .

I did not use it to get the 850v, i just used more turn on the pickup coil that is all .

@jesus

Your drawing is wrong on the right side blue coil output should be on the outside not the middle.

@xee2

Yes it could be used has a pickup coil , but i did not design it in that fashion .


@Nop

Tell me if the freq would be set by something else then the base resistor like a quarts or a resonant circuit would the  freq be more stable, then with just a resistor.


Mark

[jeanna]

@MK1

Please take a look at your drawing close-up from the one that Gary posted last night.

I think the colors of the wires crossing in the middle are mixed up. Could this be what is wrong?

When I follow the blue wire starting from either side, when it is finished coming out from one set of turns it must be where the red wire is in order to cross over to the other set of turns before they are wound.
(The same thing happens with the red.)

Thank you for this information,

Of course, if it doesn't work, we do not need to use it. I am not sure if it worked when you tried it.

jeanna

[Mk1]

@MK1

Please take a look at your drawing close-up from the one that Gary posted last night.

I think the colors of the wires crossing in the middle are mixed up. Could this be what is wrong?

When I follow the blue wire starting from either side, when it is finished coming out from one set of turns it must be where the red wire is in order to cross over to the other set of turns before they are wound.
(The same thing happens with the red.)

Thank you for this information,

Of course, if it doesn't work, we do not need to use it. I am not sure if it worked when you tried it.

jeanna

The drawing may not be as precise , as some would like , but its not wrong , and yes it works , other wise i would not have bothered making it. I posted the conclusive result .


Mark

Ok a made a new one see next page.