Joule Thief

[innovation_station]

I tried a little something with the conical pancake today.

EESH
I wound a wee little jt on a 3/4 inch toroid, then I made a 6 turn secondary, and
It went into resonance with a beautiful ring looking like a ring.
with 6 turns it makes
70v
33.8khz
56mA

now, 70 volts will light up 10 leds nicely and that makes 5.6mA each.
But the very best part is that the resonance does not quit.
Whenever our batteries run down, the circuit goes out of resonance.
I have not seen this go out of resonance yet.
It makes sense because of the conical shape.
This looks like a mini wardencliff tower.
I have not yet made a Dr Stiffler radiance tower. I better make one so I get how to connect things, or what happens.
Maybe jonnydavro's pie pans will work.
I want to scale this up, but I am not much with building these things.
Have a look.
It is short and basically unedited.

http://www.youtube.com/watch?v=I9fbn01_clA

thank you,

Jeanna

love ya !

lol

what about air core jt and 2 feroite cones .... ?

: )

great work as usual!

J

w

should you go this rute you can employ my orbit coil ... with out ANY TRANSISTOR ...

feel free J  your more than welcome to use anything you choose!

btw what i was getting at is try pnp and npn in the same coil ! same wire oppisite dirrections!

[jeanna]

Hi Gary,
Yes, I started there.
I think the little 2 inch cone made about 2-3 volts when I used it as a primary.
I don't remember, but it was better when I stuck some nails inside, and that was tricky to say the least.
Later on that day I tried to make the cone incorporated into the secondary and I got about 21 volts and I saw an amazing wave and posted that one too.
It was able to light 3 leds in series at that time.

I actually put it down until today.
I needed to let it simmer in my head a little.

This toroid is somewhat bigger and fits over the top in a way that I think makes a difference.
I think that because when I was playing with it that first day, I could clearly see that the effect happened when the center of the toroid was surrounding the peak of the cone.

I am thinking I should make the wire that comes out and is connected to the scope probe into a sending thing.
It is so shabby and wants to fall over so much it is even hard to do a preliminary test with it, but that is where I want to go.

I am grateful to jonnydavro for starting the aluminum pie pan thing. I think I might be able to combine this with that.

thank you,

jeanna

[jeanna]

@Bill,

How many turns are on your conical coil?  Was it mag wire

I do not know how many thrns, maybe 30 of each color?
I lose count on a good day and this had no reference place for counting. and many are overlapped, because the poster paper bent and got weird... so, it is hard to count now.

Are all your 10 LED's lit at there brightest with your small JT ??

they are in series and the same brightness.

You have 6 turns on secondary, how many other turns on toroid do you have

The tor-61 has 4T,9T for the primary, and 6T secondary.
What follows is a series connection to the cone pancake coil.

Is your current draw 56 mA

You know, I don't know.
If I were to put a 33 ohm resistor into that and compute with ohms law, it would probably be 5mA but the volts out would be lower.
I realized a while ago that the amps draw is what it is from the basic jt circuit and that is all. I am watching this aspect too, but I am not at all sure that measuring the amps draw is very accurate.

Or would 1x LED light brighter than your 10 on this JT of yours??

1 led would last about 2 seconds then it would pop out.
It would be possible to put 9 or 8 but I would not advise any fewer than this.

What do you mean when you say the resonance does not quit ?

When you find the point of resonance in a circuit you see that characteristic ring that is in the video.
It is a very narrow band, however, and if you sneeze on it or certainly if you decrease the volts going in you will move to a place out of resonance and the output which is very special will drop to a normal level.
In this case I would expect the volts of 3T,9T,6T to be about 12v. In a real transformer the volts would be stepped down and be less than 1.2 v going in, but we have already seen the special case that in a jtc this is no so.

However, a 6T secondary should be 6-12v . (I can check in a little while.)
So, the only way that this can be 70v is because of the series coil that is coming after the wire leaves the core.
That is fine, but this is staying at resonance and my guess is because it is from the cone shape. Each turn has a different radius and I believe it self tunes.

These are my thoughts at this moment.

thank you,

jeanna

add:
@ist

2 feroite cones .... ?

The second one seemed to "put out" the first one! I did that a while ago, and I still have the other cone, but it was down rather than up.

@gary I think it is different when it is in series and after the wire leaves the toroid core.
j

[freepow]

@ Jeanna,  great video, what is the conical coil ??

@ all others , thanks for your info too !

[jeanna]

@ Jeanna,  great video, what is the conical coil ??

I made a pic the other day.
This was too fuzzy (so I did not post it)  but if you look under the 2x toroids you will see the toroid.
I used this today but with a different single toroid.

Jeanna

edit
I made the conical coil the following way.
I held 2 similar pieces of mag wire together and wound up the paper form.
The diameter got fatter and fatter.
I stopped when I lost control of the form. It was very light and after a while the wires made it want to fly out of my hands.
When it was finished there were 2 wire ends at the top and 2 ends at the bottom.
I sanded the ends and connected the beginning of one to the end of the other the way we do with the primary of the jt.