Joule Thief

[resonanceman]

Hi , welcome again ! Yep the dots show polarity , but it could be done in so many ways , usually means the coil input is North (positive side) the output is South (negative)

There is a magnetic amplifier book on this side , worth to have a look at , saturation all toroid are different and if no data , it needs to be tested , a scope would be helpful , i don't have one , so i can't help there , but get it to work first worry later ?
Someone will help for sure.

Mark

Thanks  Mark


gary

[resonanceman]

@Gary,
Hi

Yes, those dots indicate that the coils are going in opposite directions. It happens when you twist the wires as described in the make a joule thief instructions. You don't need to decypher it.

It seems that it is what makes this little jewel work. The self inductance that was the enemy of some (and which NT fixed with his pancake) is not at all the same problem here while the jt is making the ac out of the nearly dead battery.

jeanna

Jeanna

Thanks  for answering   


So  my  bifilar bi metal pancake coils might work for a  JT .......right?

gary

[innovation_station]

i would discharge the 30 freely filled caps to it 

then use what comes back 

ist!!

i could cut it down to 3 outputs if i want ..... 

imagine how fast 3 caps would charge ...  with 30 feeds.....  from 2 dead batteries ...


see where this goes...................

?

ist!!

any how back to right now the mk2 6 pac is all mounted ...  i will wire it up next ...

[jeanna]

So  my  bifilar bi metal pancake coils might work for a  JT .......right?

gary

Yes

I recommend making one joule thief in the way of the instructions on the evilmadscientist page - the makezine video. It comes up on youtube along with almost any joule thief page.

The reason is you will get more of its implications by making one with your hands than by thinking it through in your mind. It wants to teach itself, sort of...

A while ago someone here had disappointing results using bi metal in a joule thief. But this is what our old friend Nathan Stubblefield was up to. About that I have no doubt. So, I think it should be pursued more.

I sure am glad there are so many different people on this project. There are so many possibilities that need to be tried out. I am glad you are here and caught up too!

jeanna

[Mk1]

@all

My idea on the Nathan Stubblefield , first the battery is made with the copper and iron coils the cotton to isolate the electrolyte from touching the copper directly like any battery , then you sit it in the electrolyte the third coil iron only is pulsed by the battery and since its iron its magnetic action is amplifying the output of the battery , like a core on the jt but on the outside. Ex ignition coil is reverse and self powered.

Mark