Joule Thief

[xee2]

@ kooler

question here
i wrap one tor-60
secondarys... back and forth in till i got 700 turns and it got me 125volts on the scope
should i wrap all the way around.. in layers to try to get higher volts...
i got one with 426 turns that gives me 357volts.. one layer
i also ordered some 3055's to see if that helps...
is it that i wrap it right handed...

I think 700 turns will give you over 3000 volts out. If you are wrapping in layers you may be exceeding the wire insulation spec and shorting between turns. Most wire is rated at 300 to 600 volts. This is not a problem for single layers, but is for multilayer.

[Pirate88179]

Xee2:

You think we could really get 3,000 volts out of one of these toroids?  Would we need a thicker primary?  I was going to try solid copper wire for less resistance on the primary at about 20 ga.  We could make a combination Jeanna Light and stun gun.

Bill

[xee2]

Xee2:

You think we could really get 3,000 volts out of one of these toroids?  Would we need a thicker primary?  I was going to try solid copper wire for less resistance on the primary at about 20 ga.  We could make a combination Jeanna Light and stun gun.

Bill

Yes. I was going to make a 1200 turn coil but never got motivated enough to wrap that many turns. I worked out a design to solve the insulation problem (I think). I suggest staying with 80 to 100 turn single layer until you have something working.

[jeanna]

You think we could really get 3,000 volts out of one of these toroids?  Would we need a thicker primary? ...and stun gun.

I put my scope away when it read 1400v
I unwound 2 more primary wires and the top should have been around 2k
We need thicker insulation on the pickups- not the primary
The primary is just working the transistor
The shorting is a big problem. Tesla dwelt upon it... he solved it with oil.
Stun the person making it!
end edit

question here
i wrap one tor-60
secondarys... back and forth in till i got 700 turns and it got me 125volts on the scope
should i wrap all the way around.. in layers to try to get higher volts...
i got one with 426 turns that gives me 357volts.. one layer
i also ordered some 3055's to see if that helps...
is it that i wrap it right handed...

Kooler,
Please let me know that you made the primary with 2T and 10T
The end of the 2T goes to the resistor at the base of the transistor.
The 10T goes to the C of the transistor.
And, you need the 3055 and as I said the tip worked a lot better for me.

I will describe the way I wound and I had about 300-350T on my secondary.

start in the middle of the free space of the toroid.
However you wind is ok just wind the same way on all of it, so if you go over the top and through the middle do that everywhere even on the primaries.

So starting in about the middle wind 30 turns progressing to the left.
Then progress 30 more turns to the center and continue 30 more to the far right.

Be careful to place each wire in the space between 2 wires. There will be a place where the wires cross to the next space. Let it be even and let that be on the inside if you can.
This is 90 turns so far.
You are finished with the left side. You will not be going over those wires again.

The final lap has 8 turns in each space.
the other part here is that you really need 32 because you need 30 spaces and not 30 wires. If this is confusing just do it because it will become clear while you are doing it.

OK so each time you cross over one of the wires that is already there, add 8 more in order neatly if possible and being sure to touch the toroid material as much as possible.

I really think it is the transistor.
If you cannot get one of these tip3055 for a while, then make a smaller one in the way I have described and light a string of christmas lights that hang outside with a battery for power. cool.-r.

BTW the one I made for christmas lights has 12 on each lap and only 4 jammed in between the wires on the last lap.
It is on now with a 2N3904 and a 47 ohm resistor and it is making 172v from a total of 84 turns.

Please ask more questions if you need to.

jeanna

[Gilobob]

@ guruij
Here is the circuit just the core is different then a normal jt circuit. I also remember i had some trouble winding it the right way. I find out more about that when I make the bigger ones. I want to see if there is a difference in winding it north to south or south to north or starting in the middle.

@ sptrue
About the Rodin coil, I made one and placed 2 collectors on it (one outside and one in the middle) then i wound a coil like a toroid over it. I haven't hooked it up yet, I'm waiting for some parts to drive it.

Back to some reading allot of post in one night (night for me )

GrtZ