AC from Joule Thief Secondary/pick-up

[gadgetmall]

Hi everybody,

Here is a drawing of the 2 tier circuit in a different way.
I will probably need to change this some more, but I think it shows some of the interesting parts better than any previous drawings.
All of these figures are with a 10 ohm resistor at the battery. The fully charged AAA battery made the basic voltage (=voltage of basic JTC secondary) over 100 volts and I started to blow leds, so, I added the resistor.

The other oddment is the resolution of the scope.
For most figures the probe had to be on the x10 level because the voltage was off the chart otherwise.
But the scope sees more when it is "far away" at x10 than it does when it is at basic 1:1 probe strength.
I do not know how to resolve this.
So, this is what I have now. I hope you will find it interesting too.

jeanna

EDIT, in asking Bill to look at this I came across the description of "nested parallel circuits" I made that up of course, but I think it might help in figuring out what is going on here.

Hi Jeanna . Nice Drawing with those little coils do you want this to produce more voltage ? then if Yes we need to add a tank circuit . if you dont mind can i take your schematic and add to it . the next thing is multiply the outs, which one  ? all of them need higher volts ? Ac and or Pulsed dc or rf  ? .Very Busy enev thought I'm retired I have a 7 years old and she has two summer camp and bible camp back to back this summer as you know i am single so . i'll pop in and out and check up the progress .
Gadget

[stprue]

I will use the 2N3055 for the chokes and the biggg ones. Then I will use the magnet and see.

Maybe I will dig out a hazens style and try the magnet on them too.

thanks,

jeanna

Neo's do the same thing to the Hazen design, both change frequence and lower the voltage.  I would like to know what the wave form looks like with magnets put in various place on a JT coil ie base collector primary! Could you post this for me...pretty please?

I wish I had a scope!!!!!

[stprue]

Ah yes.

It took me a long time and it took a lot of patience from both of us (some of it was in a raft of pm's) to get me to understand what MK1 was doing. I do think it is brilliant.
The Canadian they speak is french. That helped me a lot. to know that an "a" means "one" sometimes but can also mean "at" because that is what it means in french. Anyway, I will try to help if you want me to.

Here, for a conceptual starters, try this:
the coil is wrapped over the toroid then through the center in the same way throughout. It begins at one spot and progresses to the left a number of turns then turns "progression" direction and goes back to where it started. Then it crosses over (*) the primary or a blank spot and continues on the other side up the same number of turns and again returns to the beginning spot.

* when it crosses over, you can pull out a few inches of wire as in a center tap.

Try it with 10 turns in each way and see what you get.

The "tuning" of the primary to the toroid is important, too, but even though MK1 insists it must be done in the beginning, I believe that as long as you are in the ballpark with a certain toroid, you can fine tune it later.

He disagrees with me on that point, and he may well be correct.

In a way, you could think of it as a center tapped secondary if you connect it that way.
But connect it from beginning to end for the most volts. Then fine tune it for most volts output.

So, xee, give it a try and see what you get.

I like the way Hazens1 makes the primary. It is a wee bit less powerful than the true bifilar, but not much and a very good way to start tuning a toroid, because it is so easy to alter it.

jeanna

xee let me know if you figure out how to wind a mk style coil and please post some pics, I still don't think I'm doing it right!

[jeanna]

Hi everyone,

I will attempt to make a short verbal description of the MK1.

Overview first:

All the winds go the same way...from over the top through the center and around and up again.
You will be wrapping the coil in 3 directions ultimately. (because it is a toroid, this means the mags move 4 times)
Start at the bottom and end at the bottom.
You will end up with 2 wires.

In this example the total winds will be 40.
OK here goes:

Starting at the bottom left side leave a nice long tail for later connections  and
wrap the wire up 10 times
wrap one more then return to the bottom.
(if you don't understand this, draw 10 hatch marks on a paper then count the spaces in between them)

At the bottom, after you have wound 20 turns  you are coming out the bottom, so go over the primary windings and continue through the center.
(you can pull out a few inches for a center tap before diving through the center again.)
Continue winding 10 more turns up the right side and
wind one more and
wind down the right side to the bottom.
The total turns is 40.

Leave a nice tail.
Cut
sand tails-connect, and - tune.

(of course, you can wind the opposite way from my description; but, the point is to stay wrapping the same way throughout.)
Keep the crossed wires in the center if possible and on the outside put the down wires in between the up wires.
======

Neo's do the same thing to the Hazen design, both change frequence and lower the voltage.  I would like to know what the wave form looks like with magnets put in various place on a JT coil ie base collector primary! Could you post this for me...pretty please?

I wish I had a scope!!!!!

hmm, I will do what I can. As you may remember my scope does not have a backlight and there is a lot of glare.

The wave stays the same shape but it gets narrower and shorter.
As the frequency goes up (waves are skinnier and closer together) the voltage goes down. (peaks of the waves are not as tall.
Kubikop has a nice shot of this one on a video of a jt. He is showing the wave of a jt on his scope, the he says, "now, I want to show you something..." and he snaps 2 neos onto the toroid. bam! the wave crunches together and gets shorter. Same happens to my all the time. (I had seen this consistent paired-change while tuning the primary with a scope. Every time the volts went one way the freq went the other.)

jeanna

[stprue]

Hi everyone,

I will attempt to make a short verbal description of the MK1.

Overview first:

All the winds go the same way...from over the top through the center and around and up again.
You will be wrapping the coil in 3 directions ultimately. (because it is a toroid, this means the mags move 4 times)
Start at the bottom and end at the bottom.
You will end up with 2 wires.

In this example the total winds will be 40.
OK here goes:

Starting at the bottom left side leave a nice long tail for later connections  and
wrap the wire up 10 times
wrap one more then return to the bottom.
(if you don't understand this, draw 10 hatch marks on a paper then count the spaces in between them)

At the bottom, after you have wound 20 turns  you are coming out the bottom, so go over the top and the primary windings and continue through the center.
(you can pull out a few inches for a center tap before diving through the center again.)
Continue winding 10 more turns up the right side and
wind one more and
wind down the right side to the bottom.
The total turns is 40.

Leave a nice tail.
Cut
sand tails-connect, and - tune.

(of course, you can wind the opposite way from my description; but, the point is to stay wrapping the same way throughout.)
Keep the crossed wires in the center if possible and on the outside put the down wires in between the up wires.
======hmm, I will do what I can. As you may remember my scope does not have a backlight and there is a lot of glare.

The wave stays the same shape but it gets narrower and shorter.
As the frequency goes up (waves are skinnier and closer together) the voltage goes down. (peaks of the waves are not as tall.
Kubikop has a nice shot of this one on a video of a jt. He is showing the wave of a jt on his scope, the he says, "now, I want to show you something..." and he snaps 2 neos onto the toroid. bam! the wave crunches together and gets shorter. Same happens to my all the time. (I had seen this consistent paired-change while tuning the primary with a scope. Every time the volts went one way the freq went the other.)

jeanna

Jeanna thank you for the description, I will make another attempt at making the MK.  You didn't make mention of the cross overs though!  So I don't actually cross over any windings either outside or inside the diameters of the coil, right?  Looking kinda of like an XXXX  I'm guessing!


It needs to look like this //////////up and then returning ////////////////////down?