Joule Thief

[jeanna]

@Jeanna

Please try to build this as my idea is a little different so we could rule out the wrong way to build this quickly...Ihave a feeling the right way would be worth the effort

Good point.
I will do this.

Anybody else want to jump into the pool? 

jeanna

[stprue]

Good point.
I will do this.

Anybody else want to jump into the pool? 

jeanna

Nice....

I have mapped out 2 different ideas on a printed out sheet..I will scan it tonight and post both ideas...I honestly see like 4 or 6 other ways to wind this kind of design.

[stprue]

Stprue

Great   

We might have something here .

I think  IST and MK are the  "experts " at  visualising  the  magnetic  fields  and current flows ...........maybe  they can answer my  question about   posative  feedback

I am thinking  if the JTs  have posative feedback  they  will keep each other in sync.


gary

Yes you are right.  I can't remember you have the right hand rule for + is it the left hand rule for -???


IST

MK

H  E  L  P             S                O                  S

[resonanceman]

Yes you are right.  I can't remember you have the right hand rule for + is it the left hand rule for -???


IST

MK

H  E  L  P             S                O                  S

Stprue

I think it is the left hand  rule .
That  alone  does not help me  .

It is an intelectual  rule .
I can intellectually work thought it but I will not  really understand it until I  SEE it .
My process is  visual rather than intellectual .


gary

[Mk1]

@all

This is old stuff but there it goes .

The 4 jt coils are made of 12 turns of 22 gauge bell wire. There is also two secondaries of 24 turns up and down over each half.

If my memory is correct i got about 70 volts per secondaries .

Now this showed me that sending 2 kicks in one toroid is not that simple because the pulse from one can trigger other transistor out of time even if they are not connected to battery , i tested with one led on each side i can remove any one of the two transistor and the circuits keeps going both led are really bright.

the yellow and red work together and blue and green work the other transistor.