Joule Thief

[NickZ]

  @ Pirate, Jeanna, and all:
     I'm building several JT circuits now, and I also think that the small toroid (1") is a very practical size, especially if they can be made to output enough to light the CFLs or many Leds.
  I've made a bifilar (1") toroid 78 turn, 28 gauge, that I'm using. It's running off of two regular AA's and charging another set of two AA batteries. Which I've been switching manually back and forth every day, or so, but I'll install a switch soon.
I notice that once the AAs are conditioned by the radiant pulses, the JT does not like the regular new batteries and will not light the leds, at times, until I replace them with the radiant charged ones.  I've had thr small toroid circuit light all the leds that I have now, which is 25.  But it will not light a gutted CFL.  It has been a great night light, and has been running 24/7 while lighting the leds and charging. Already there are leds lit all over my house, as I like lower light levels especially late at night. I really like dimmers, and the JT can use them, unlike the way the 110 volt led lights come when you buy them.
   I also have a 16 Led Emergency Back-up Light that runs on 110v, and charges a big capacitor that comes inside of it.  It is supposed to last 5- 6 hours of backup light once charged, but it's only lasting about 2 hours. So, I'm going to adapt a small toroid (from inside a CFL), and install it inside of that back-up light, along with the 2n2222 transistor and resister, to see how much longer it will last.  The 16 leds light give off a fair amount of light, and I'm planning on running my whole house off the high powered 12 volt leds JT.
  Bill, thanks for the tip on the 100 10mm super bright leds for $11 on Ebay. They seam to be the cheapest best deal out there.   There are also several 12 volt multi led light sets that can be used with the bigger JT.  Can wait to try some of those lights also.
  I've been having a great time working with the different JT circuits, and can't wait to see what more can be done with them, and just how far this simple technology can be taken.
  Thanks to all, for your very helpful explanations on these projects.
              NickZ
   

[The Observer]

Say Jeanna,

You recently stated...

I think the 2 elements that are most important are the high permeability of the toroid,
which happens to be a toroid with enough room inside for plenty of turns,
and, the TIP31 transistor.

I am concerned with the 'high permeability of the toroid'.

     I have stressed from day 1 here (3 years ago) that I believe Ferromagnetic Materials are a legitimate source of OU,
     The reason being unpaired electrons that create "free" magnetic fields that can be used and or manipulated.
     I appreciate the experiments here.. but I have found few if any that want to talk about the science. (of Ferromagnetics)

Pirate claims that at least some of the cores you guys are using,
                        for impressive feats like lighting a CFL for an appreciable period,
                                                                                                                       are Not Ferromagnetic.

This assertion has me beside myself (if true, then I have no idea how the CFL is lighting for that long).
So I need to ask you a simple question.

"Have you lit a CFL for an appreciable time without using a 'good' Ferromagnetic Core in your JT setup?"

Thanks in advance for you advisement.

Best Regards,
                    The Observer

   P.S. By 'good' Ferromagnetic Core I mean...
           a Core of High Magnetic Permeability (Very High Internal Magnetic Moment)
           of Low Coercivity (which means the dipoles spin easily)
           and virtually nil Magnetic Remanence (dipoles and domains turn to random directions after magnetization.).

[Pirate88179]

Observer:

http://www.spherotech.com/fer_par.htm


Partially quoted below:

"Unlike paramagnetic particles that are made using iron oxide, SPHEROâ,,¢  Ferromagnetic Particles are prepared using chromium dioxide coated onto  uniform polystyrene particles. These particles retain magnetism once  exposed to a magnetic field. The particles can be demagnetized and  re-magnetized repeatedly and reproducibly. "

As I have been saying all along, ferrite IS iron oxide.  All the definitions of ferromagnetic materials I can find on line all list metals like iron, nickel and cobalt.  Again, these are metals, ferrite is a ceramic.  Totally different structure.

I hope this helps.

Bill

[The Observer]

Bill,

I'd like to know what Jeanna thinks,

What I would like to know from you.. is if you think your core is covered in the following book.

Best Regards,
                     The Observer

[kooler]

i know this isn't the right place for this link but you guys always talk about boost caps

goldmine has 3000 f boost caps for 30$

http://www.goldmine-elec-products.com/prodinfo.asp?number=G17930