Second Stage Joule Thief Circuits

[Pirate88179]

Gary:

The large toroids are not in short supply.  We can get all we want or need.  Jeanna found a distributor that asks only a $30 minimum per order.  @ around $2/toroid, that's 15 of them.  We can pool a few folks together if that is too many for what a person needs.  To me, that is cheap per toroid and they can handle orders of thousands of parts if we need them. These are the same toroids from the same maker.

Since I am using them 2 at a time, I will need to get more of them soon.

Bill

[innovation_station]

this is wonderful bill!


can you post a pic of a dubble core unit ...

im gonna find some money some how .... 

and im a get a tonne of em ...  ill make em piss fire ..

ist!

[Pirate88179]

Here are some photos.  Sorry for the blurr, I was in a hurry as I am still trying to get this done.

Bill

[stprue]

Wow Pirate that a nice build!

[jeanna]

Hi all
I am posting the pix for Gary...
So, here is his text:

I have been thinking about  what we can do  to make a stronger JT
It looks like the  supply of the very large toroids  is  going to be very limited .

I have been looking for ways  smaller toroids can be used in place of larger ones .


I have came up with this so far .

I call it  a Candy Cane  JT .......because the windings spiral around the core like the stripes on a Candy Cane .


This is a first test . From  what I have learned  with  this ......if I was  going for max voltage I think I would mostly fill  each toroid  with a large winding  then  use an external winding as primary .


I am not  trying for  high voltage  at this time .    I am trying to find a good Ultracap charger .

I think my next test will be  large windings on the  toroids ....but  I will  try those large windings  as primarys .     
I will need  larger  toroids ..because I would expect to need  quite a few external  windings ....

8  5 for $1 toroids
Blue wire 5 wraps per toroid
Orange wire 3 wraps per toroid
Green wire 1 wrap per toroid

All wire  twisted pair from Cat5 cable
1 AA battery  used for all readings
All secondary readings were taken  with  both  wires in parallel.   If  the wires of the pairs  were  put in series the voltages would be close to double these readings 

Orange  as primary     13.8 V on  blue  1,7 V on green ...... external green winding  11.6 V  .....external orange 5.6 V

Blue as primary ......  6.6 V on orange      1.5 on green ........ external green winding 7.9 V  .... external.orange 2.2 V

Green as primary ..... 14.8 V on blue   14.0 on orange  ........ external green winding 24 V ......external orange 13 V



External green as primary ..... External orange 1.9 V.......  green 2.3 V.....  orange 5.8 V ....... blue 8.6 V

External  orange as primary  ...  External green 20 V  ......green 2V .......orange 12.4 V  ...... blue 18 V 

I did not measure the  current  of  the windings
I find  that  the readings of a normal DMM  are not accurate at all with JTs

I will see what I can get it to do later 



gary

now here are the pix that go along.
jeanna