Joule Thief

[resonanceman]

the battery charging from a joule thief should be explored more on a chemical side, i personally dont know enough about chemistry to do so does anyone else? 

while floating around the internet i found a "desulfator" which uses IC's namely the 555 timer and sells for 90 bux. this unit refurbishes a battery when it gets the white crystals on the lead electrodes. it cleans the battery by sending high voltage (35 volts for a 12v car battery) pulses into the battery cleaning the sulfides off the electrodes and allowing them to be properly consumed during the recharging of the battery. i myself have burried many a battery before finding this out but i have many batteries both lead acid and other to experiment with!

the joule thief can easily be used as a desulfator if the LED is removed and a (shotskies?) diode of 35v and the battery added in its place.

im personally exploring this application now i just need to find the right diode there is much to be read about this online however if one is interested.

Artic_Knight

You  do not need a special  diode .....  I have used  a  diode bridge for  years

I bought  this   years ago .
http://www.eagle-research.com/store/index.php?main_page=product_info&cPath=3&products_id=35
This  guy is open source ...... I think he is worth supporting.
in his booklet  he explains  how to build  a capacitive charger  how to use it and why   you will never see a  charger  like this in a store .

It  is  real  simple ......   just  a cap and  a bridge ..........but  you need to know  what is going on and how to use it .

I use  4uF for  reconditioning   my car battery . ....


gary

[resonanceman]

It  is possible  that I have learned more than I  thought  I have.

There were several  coils  of wire in the TPU
I have always thought that one of them was iron .   I  still do
Iron would make   a pretty good  toroid core .

I  have learned that a little  to much inductance    will choke  a  current  to almost nothing  real  quick .
It now seems to me that the outer  windings on a TPU  that  SM  called  control  coils  are    there to add inductance    if  to much  current  starts to flow  the outer  coils  will  kick in  and  slow things down .
A  space  between  the  power  coils  and the   control  coils would  let  a certian amount of  power  to be generated before the  inductance of the  control coils  kick in .

The  other  coils  on either  side of the iron coil  may  be just copper wire .
I am thinking that with a   rotating  mag field   current  would  be set up  in  these  windings ........they may   " charge "  like  MK  talked about  a few posts back .

The  JT might  be a good way to provide  the kick  that SM was talking about ......if we can  just get the rotation right .

gary

[Mk1]

@gary

Yes the jt is great for learning its a must ... now the tpu may have iron inside of it or a single copper loop for a closed core type deal , but mostly what we see as a core in the tpu is the collector , pulses creating rotation but mainly a single direction flow (dc).

But now we can all get the picture ,

Mark

[jeanna]

Woah, this thread is hopping today!

@Bill,
I was afraid of that . the toaster problem...

@All,
I have been away just now building.
I first wound the primary, I will call it, just like the drawing MK1 provided with the 4 colors.
It would not turn on a led in the BJTL spot no matter which ones I combined together etc.

I have been wanting to use that .x2 configuration MK1 did and make it at 90 degree angles instead of 180. So, I did that...

But... I made a mistake.
I will report this then go fix it so it is what I intended.

this is a very good looking wave. With the BJTL in place it is better, but still without it. It is a very even wave and oh nice.

I probably cannot describe it without a pic, but just in case.

The collector wire:
Red starts in the 3 oclock position it goes over the core to the center and progresses to 4 oclock. It over the core and across the center then winding under the core at 9 oclock, progresses to 10 and comes out from under. This end goes into the +

Now this has the 'mistake' in my mind:
Green the other +
starts at 12 and over through center and progresses to 11, then crosses through the center to under at 6 oclock and progresses to 7 oclock coming out from under and connecting to the Base resistor. [edit. instead of progressing to 7 it should be progressing to 5 oclock]

the jt alone without secondary; tuned for highest voltage had a resistor value of:
122ohm and had
153KHz
4.95v
with the light in place.

I left the resistor unchanged and added turns. I had 12 turns for the primary and I wanted to add more turns than 12 so at

14T and 1 led in the BJTL spot (measuring across leads of secondary)
6v
222KHz
122r

removing the BJTL
14 turns it was showing (measuring across the leads of the secondary)
16v
256KHz
122r



Still no BJTL, but with 3 leds in series (measuring across leads of secondary)
9.38v
263KHz
122r

OK. Now I need to change the green so the second half of its winding goes in the opposite way from its first half as the red one does..

jeanna

[resonanceman]

@gary

Yes the jt is great for learning its a must ... now the tpu may have iron inside of it or a single copper loop for a closed core type deal , but mostly what we see as a core in the tpu is the collector , pulses creating rotation but mainly a single direction flow (dc).

But now we can all get the picture ,

Mark

Mark

I remember  seeing a picture of  a  piece of a TPU that was  cut  up  after a demonstration  ....... it looked  like  3  coils to me ..... and  there was  something that looked  like cork .

I think  the  cork  was  above and below the  coils but I can;t remember for sure.



I  need to  get  working on a higher voltage  JT

I  have always that that   one of the  keys to  radiant  energy is high  voltage ........another is  fast rate of change .
I  think that  the reason that  SM  suggested starting with vacuum tubes is  they  put out higher  voltage .
The  propper kick  would  be easier  to achieve with vacuum   tubes than it would with  transistors .



I agree about the DC
I see the  magnetic  field having  a " squeezing "  affect  on the   copper  coils in the core . .....this  squeezed area pushes the  charge along .    If this is  true  the TPU  generates  its power by rotation not  normal  transformer  effect .


gary