Joule Thief

[jeanna]

@jeanna

Remember i get 60 volt per 26 turns coil. So 120 volts for 52 turns.

Yes, but I did not get anything like that. I got 28V from 52 turns. That is a lot less than 120V.
(and when I had the turns going wrong there was around 2vdc. It was only enough to barely turn on 2 series of lights.)

So, I expect the reason may be some technique, some materials, some size of toroid...

That is the reason for my test.

Thank you for putting those numbers right here. It helps the continuity of the test.

jeanna

[Mk1]

@jeanna

I got the feeling that if increase the number of turns from the 7 turn coil you may get more, maybe try 10.

I made one with a smaller gauge 26 and did not get much out of it.

@pirate

I bigger one may need more turn , but will permit bigger wire and more turns , and that is real good.

[jeanna]

@jeanna

I got the feeling that if increase the number of turns from the 7 turn coil you may get more, maybe try 10.

I made one with a smaller gauge 26 and did not get much out of it.

@pirate

I bigger one may need more turn , but will permit bigger wire and more turns , and that is real good.

Why is that? did you do that?
In this trial I have 11 bifilar so 22 altogether.

I am wondering about the magnets. were they part of it when you got 120 volts?

Anyway in a couple of hours or less I will have this done and can measure it.

thanks,

jeanna

[Mk1]

@jeanna

The magnets are not needed for getting the 120 volt result.But there is a chance your ferrite is different and may need more turns on the jt part of the circuit. And on the pickup coil , a have notice a better juice flow greater power from bigger wire , the 26 turn coil on my Mk1 Unit are like 2X13 serial coil per side .

[electricme]

@ all
I'm stumped here on the wire size used by everyone, to wind these coils, as surprising as that may seem to those who know me from my posts.
So I'm going to hold my hand up and holler for help    HELP    

I know that wire sizes differ from country to country and this is confusing for me.

Can anyone reading this "help" kindly point me to a website that has a photo of all the wires along with their sizes on a chart that I can download, I need to go back to skool again.

I need to see the actual wire size itself with it's size next to it.

I think others reading this thread would like to get this innfo also.


@bill
Ohhhh you are in fine form today, ie kitty travelling and lost PCs, ha ha   

I don't think you are overdoing the accolades, (us all being the best group) keep it up kind sir, not enough of this is about in the world.

@jonnydavro
Thanks for the file you sent me, wonderful indeed, it looks even better now.

q1 If I was to make a solonoid coil like yours, how many turns would I need to wind on a bobbin
q2 I only have very thin wire, so my coil would be a lot smaller than the one in your video.

@ MK1, Xee2, jesus, Bob, sparkes, jonnydavro 
What do you guru's think of this idea I have?

Should I begin by stripping down a small transformer, and use the transformer laminations to wind on some coils? or should I use a torrid instead? I'm trying to clear the cobwebs in my mind about this.

Attatch a reed switch at one end of the laminations to switch off the energy to the coil.
If I put several reed switches in series, this will stop most of the pit burning inside the reed switches to make them last longer.

Next feed the BEMF through a bridge diode, and feed this into another transformer to reduce the HV pulses back to Lo voltags pulses, then feed this back to my 1.5volt battery?

I know there will be others reading this and will say to use another method, but I think we could go in that direction "after" we have a working setup.

jim