Joule Thief

[MrMag]

NPN   Not Pointing iN

PNP  Pointing iN Proudly

[jeanna]

@MK1

I just exchanged the 2222 that I have for the 3904 I have been using in my breadboard experiments. I may not matter, but just to be clear, the toroid in this is the half wound one with the 1 1/2 turn secondary.

The 2222 draws .44A from the same exact set up where the 3904 draws only 0.33A
So, the lights look about the same brightness, but the amp draw is higher with the 2222.

=======
May I get an explanation please?
About counting the turns. If I start at the outside of the toroid and feed both ends through the middle and end where I started, is that 2 turns? It seems one turn to me one complete turn. There are however 2 strands of wire going through the center to get there.
Ist used a way to close the wire by twisting it onto itself and so close it. Is that one turn?

Thank you,

jeanna

@MrMag    thanks. I will see if that helps. thanks for trying.

[TheNOP]

for turn reference see  MK1 post.

http://www.overunity.com/index.php?topic=6123.msg153563#msg153563

a U shape count as 1, even if you make it a twisted paires outside the toroid.

[resonanceman]

I have been very busy  lately

I  was trying to read this thread  but havn't  had  any time to  read  the  older  posts 
I  have gotten to page   40 .......   been there all week


I  picked up  a couple Mosfets   at  radioshack   when I was near there.

Has anyone   here  tried  a mosfet  joule thief?

the  mosfets I got  are  IRF510  they  are only 60  volt ...... I was looking for a higher  voltage .....but that  is all that they had  .


I would  appreciate   a link or 2   about   Mosfest and joulethiefs  if  possible
Not  trying to  avoid doing my homework .... just trying to streamline it a little so I might  actually  have time to build  something  this weekend .



gary

[amigo]

@Pirate88179

This thread is moving faster again and it's difficult to reply to posts from six or more pages ago...

I'm sorry if my post sounded like a downer, as I explained to gadgetmall it was not my intention. I was of the opinion that the direction of this thread has lost its coherence but I realize now that everyone, including yourself, likes to get their hands dirty so to speak, and just dive into it, trying various things.

Therefore I will take the sidelines and observe instead of partaking. Just because I don't agree with something does not mean it wouldn't be fun for others to do.

Thanks.