Joule Thief

[jeanna]

koolers circuit that runs off of 0.16mah was that posted and i missed it? i would assume its very similiar to his other posted backwards joule?  if anyone has a moment i would love to see how he got the draw reduced so low.

thanks!

I think he used series inductors at each side of the battery.
He started a new thread and that is where the details can be found.
I think he called it bjt (not meaning basic jt, but backwards jt!)
I am sure you can find it in the joule thief department.

jeanna

[Pirate88179]

Jeanna is correct.  That topic is located here:

http://www.overunity.com/index.php?topic=9733.0


If my link works, lately, they have not been working.  If not, just copy and paste into browser. The info in my link is accurate.

Bill


PS  My link does not work again.  Anyone have any ideas on this?  This just started a few weeks ago.  I copied and pasted from my browser and everything is exactly correct.  When I put it into link form, it now gives a 404 error even though I can copy and paste the info and it then works.

[jeanna]

must be those green stars messing it up! 

It works for me.
Thanks, Bill. I was too busy earlier to make the link.

jeanna

[Pirate88179]

Jeanna:

Yes, I was able to finally make it work but it took 4 tries of making the link the same way to get it to do so.  This has happened to me on several other topics as well.  I have no idea why.  This is fairly recent as before I had no problems at all.

I did an upgrade on Firefox...I wonder if that is messing with something in the smf software?

Thanks,

Bill

[resonanceman]

Jesus

I will try to draw up a schematic  as soon as I have time

gary

It may take a while  before I get  the schematic made .......I have way to much other stuff  going on.
I thought about taking the time  yesterday......but decided against it because I do not have working proof yet.
Simply making a drawing  will  change nothing.
All the concepts are simple......it is just a matter of putting them all together.
The  fact that  a LED is a diode and  will not conduct until it starts to light up  is well known......I am just using that as a 2 V automatic switch  ( the fact that the LED lights up is icing on the cake to me.   I needed a switch but also wanted a visual indicator )
The forward voltage drop  across a normal diode  is  around a half volt....I plan on using  a diode (or 2 ) in series  with my  LED to get  it to light up closer to my 2.7 V max

Anyone  that has played  with JT secondarys  much knows that  if you have 2 secondarys   unless you balance them  very carefully the power  will  go to the lowest resistance load. ..... this applies  to primarys as well....... my plan was to drive the base of the  transistor   using the  LED as a switch.... 
The transistor  will  be connected   between  a battery terminal  and  an extra primary coil.
I am thinking  of making the  base coil  bifiler or the entire primary trifilar.
As the  LED starts to conduct the  transistor  will make the extra primary lower resistance ......and it  will absorb more of the power that the normal base winding would have got.....dampening the JT.

I hope that this at least makes it clear what I am trying to do.


gary