Joule Thief

[jeanna]

   A bridge rectifier is used if the output is ac.  I don't believe you have ac coming out of the jt.  You really need an oscilloscope to look at the type voltage you are putting out.
...

Hi sparks.
This is one of the more interesting things about the already interesting joule thief.

The primary is called bifilar but it is really a center tapped coil. If the center is off center you will get an unevenness in the wave.
This carries over to the secondary too.
In some of mine the wave is centered and in some of them it is almost all above the x axis.
Most of the time it is about 30%,70% above or below the x axis.

I think it is an area where there are not adequate words because this particular study is new (because it is continuing from the 1800's before the electric oscilloscope was in use.  )

thank you,

jeanna

[innovation_station]

THANK YOU MOM I LOVE YOU  ISIS
DAD I LOVE YOU TOO !        : )


H

YOUR SUN!

[jeanna]

I had a christmas eve success which I want to share with all of you.
I found that my biggest problem I was having was the battery holder, but the battery was broken too and I am still not sure about that winding, so I started fresh.

I used a tor-61 which is 0.86 inch = less than 1 inch OD
!!!!
I made sure I had enough secondary wire. I lost count as always but it is probably about 110 turns on the secondary  [where the one that can't get above 144v is about 85 turns, well, I put that away, and it does light a modified 19leds bulb.]

So, again, the new one has
2T,9T,110T
TIP31 from RS
25r at base
and...

600-730v

wow!!! this is a very little toroid!!!
Last night I tried it out with some real lights and it lit:

a neon,
a15w 18" growlight tube
It actually made light happen in the fat growlight tube that is 20w, - not much more than a glow, however it stayed on unassisted by my hand.
It would only light half of the cfl. - even the 10w lit only half.

Then I tried it on an unmodified 19led bulb from LoA and folks, it is at full brightness.
---

Today I took apart the 25wcfl to try on the jeanna's light.
As you will see,  I can now finish the lidmotor's jeanna's light box lamp.

This morning, I took some pix.

So, merry christmas from me to you.

jeanna

ps captions say what they are.

[Pirate88179]

Jeanna:

That is wonderful, and all off the small toroid...incredible.  I have a question for you: How do you wind 110 turns on that small toroid?  Do you have a single layer or is there any overlap or multiple layers?  I can't even get half that on a full 1" OD toroid single layer with 28 ga. wire.

So when you finish your light will we call it Jeanna's Jeanna Light? Or Jeanna's Lidmotor Jeanna Light replication?  This may get complicated, ha ha.

I may try to wind a single large toroid today with a lot less on the pick-up coil and see what happens.  I still have about 10 TIP 3055's left so I might as well start putting them to use.

I am looking forward to your Jeanna's Jeanna Light video.

Bill

[jeanna]

That is wonderful, and all off the small toroid...incredible.
... How do you wind 110 turns on that small toroid?  Do you have a single layer or is there any overlap or multiple layers?  I can't even get half that on a full 1" OD toroid single layer with 28 ga. wire.

Or Jeanna's Lidmotor Jeanna Light replication?  This may get complicated, ha ha.

I spelled it all out, then lidmotor called it JLJL 

Here is a detail shot.
There are 3 toroids to the side.
2 are the tor-23 with 84T secondary
The lower red one is a tor-61 that won't get above 145v. It is OK because that will light the modified 19leds bulb just fine.

The green one in the circuit is the christmas surprise that gets such a high voltage. (I will have to name it something with 5 letters)
On the surface of the toroid, there is enough room for 85 or so turns along with the 10 or so from the primary.
I wound the yellow string around each side of the primary to keep the primary separate and to keep it tight. (I am thinking both those things matter.)

So, beyond the 85T I just kept winding. A while ago I learned that as long as I have as much as possible on the toroid itself - remembering to give the toroid some room to breathe, then it is OK to wind more over the first layer.
Another thing that may help is sometimes there is a little space on the outside between the first layer wires, and when I see a slot of room like this, I pull this extra layer wire into the slot without disturbing the lower layer.

I made a nice description of how to wind this MK1-jeanna Hybrid way on the energetic forum. I will find it and copy it here in a few minutes.

thank you,

jeanna