Joule Thief

[resonanceman]

@Gary,
I am assuming those letters you are talking about are on the pic you tried to post?
I had the same trouble earlier...
Please keep on trying.

Jeanna

Sorry

I thought  C and  E wires would  make sense right  away .
I guess I  should have  written    E and B rather than E and C


On a normal JT  there  are three connections made to the  coil
The  2 wires that are twisted together  are connected to the positive  side of the battey  ( B+ )

One  of the other  wires  goes to the  emitter  ( E )
The other  wire goes to the base through the  resistor  ( B)

The point I wanted to make  was the  exact same    connections   work on  the normal JT and  the one wire JT .

gary

[jeanna]

I thought  C and  E wires would  make sense right  away .

On a normal JT  there  are three connections made to the  coil
The  2 wires that are twisted together  are connected to the positive  side of the battey  ( B+ )
The point I wanted to make  was the  exact same    connections   work on  the normal JT and  the one wire JT .

It is probably the heat. I think it is 91 here today. I am not used to it .

So, what you have is a single coil with a center tap and you are using the thing as a center tapped inductor?

Not like the MK1 where it comes back to the center, but all the coils just go one way?
Do I have the picture right?

thank you,

jeanna

[resonanceman]

It is probably the heat. I think it is 91 here today. I am not used to it .

So, what you have is a single coil with a center tap and you are using the thing as a center tapped inductor?

Not like the MK1 where it comes back to the center, but all the coils just go one way?
Do I have the picture right?

thank you,

jeanna

Jeanna

I guess  you  could think of it  as a coil  with a center tap  ......the only thing is   there are 7 extra  taps ......  as far as I can see the JT can be made with any of them .
As  far as I can see it doesn't really matter  which tap you use for B+   What seems to matter more is   the placement of the  other  wires .
If  they are placed  in the  positions  clossest to the   original  connection ( B+ ) the  current  draw is lower  and the secondary  voltage is highest .

ALL  the  positions I tried for the other  2 wires    worked .....
I thought  that  a one wire JT  would  be less  forgiving  than  a regular JT ..........but  this one seems to be more forgiving .....   as long  as I got all the wires connected ( with B+ in the middle )the LED lit up . 

Yes ........all the  windings go in the same  direction .
This  coil  was intended to  help me  get an idea of how  to optimise  the LMs ( for flyback  )........  I can hook up one end .....then  try all the   connection pins  one at a time and see what works best .

gary

[jeanna]

Yes ........all the  windings go in the same  direction .

Gary,
Do you have any more information for us? Or was it all on that page you wanted to upload.

I would like to know what is happening over there.

So far I cannot make out how you would make a joule thief with one coil of wire wrapped in one direction.- even with a tap or many taps. 
How are you getting the oscillation?

To me a joule thief is based on having a transistor to make the stop and start based on the current/mag field going one way then another way in the paired coils.
Maybe not.
Maybe what you are doing is more like the fuji circuit.
Please give a few more hints?

@Altrez,
Thanks for the info. I look forward to hearing about it this weekend!

jeanna

[Mk1]

@jeanna

Concerning lazy man jt (Gary), it is made from 2 coil , like the regular basic  jt has a single center tap coil . Its just words .

But what is interesting is the disposition of the coil on a regular jt it would look like , humm  make one !

1
First take one wire skin about 1/4 inch at mid point then wind it on a toroid all the way around .

2
So at that point you will have one coil , then connect the one end of the coil to the E and one to the base resistor , at that point you will still have one coil .

3
Ok now lets make it work connect the positive rail of the bat to the middle point ( the sickened part from step one) by doing so the jt will be completed , and now you really have 2 coils .

So now its not so new after all , but a 300 feet of 30 gauge on a spool 10 taps for tuning the coils.that is something unseen .

Mark

Ps well done

@renonanceman

Do you use a core ?
Well i mean have you tried a core?