Joule Thief

[resonanceman]

@ Jeanna

MK

thanks for making that diagram

It is  right ...........but it is not exactly the basic LM
It is the one  wire LM
The  differences  are minor ......the  basic LM  would  have   a spool with many windings    and a primary  with a few windings .........sense  the windings  are connected  it in effect works the same  as in your picture .

To accurately   make   your  picture of  the LM  into a basic LM   you would have to   move the tap to  one end .........and  erase the other taps .

~~~~~~~~~~~~~~~~~~~
fine points for the one wire LM JT

The  one wire JT  seems to have  the best output when  the   conncections  are to 3 consecutive  taps ....it does not seem to matter  which  taps .
Spacing them  farther  apart  raises the current draw and lowers the output voltage .   (  at least with  30 ft  windings . )
The secondary  for the one wire LM  can be from one end  of it to the other ......... 


gary

[electricme]

@Resonanceman
Hello Gary, thats a good discovery you have made there, using toroids instead of iron to control the output, it would be lighter also.

Mark
The  first glimmer of the idea  started with  that   resistor  thing that if I understand  Jim give to  Gadget .
I wanted something  that  worked like that .....only with inductors .
Quite  a while back I spent  some time reading a thread  called something like one  wire . ....   some of those experments would be interesting with one coil .
I also have some half inch diameter NEO  magnets that fit nicely into  the toriods ......this seems to  greatly  raise the permeability .
2  of those  toroids fit well  within the  spool ......3  will work  if you don;t mind them hanging out a little .

The   first time  I  dropped   the  toroids  and magnets  into  the  coil  (  it was running with no core )   the  voltage  dropped to 0

I pulled  it out  and noticed that  as I pulled it out  the voltage went  back up .......nice and smooth .       It hit me like a ton of bricks .
Assuming  I can scale this thing up ............I  just found  out how to  make the  accelerator  peddle  for  an electric car .     

From  0  to max   power with only one  moving part ....  The  core  could be connrcted directly to the  accelerator  peddle


gary

Just some info for those who maybe dont know, inside "some" electric stick welders is a moving lamination core, it is moved in or out of the main E core to control the Current and Voltages supplied to the electrodes.

jim

@Gadget,
I agree with your remarks earlier, no probs there.

@Bill,
I also agree, so I will post my EB stuff on here.
So many things we are all working on here benifits everyone here, I never dreampt just by giving that Resistance wheel to Gadget would promote another discovery, I am surprised.

@Altrez,
Sorry, I woke this morning with a sivre headake, and fell back to sleep, I left a message for you on the landline recording service.

@all,
I just had a thought which I want to pass by you all, it concerns the outputs of EBs.

Last night I just happened to see my 1Watt Lux Star LED litup, I would have missed this entirely unless I had been heading into the cookhouse to make a cup of tea, (so I like to drink lol).
Anyway, I will make a triggor crt and it will ring a bell or honk a horn if the output swings high to let me know when this happens.

jim
 

[jeanna]

.....
It is the one  wire LM
The  differences  are minor ......the  basic LM  would  have   a spool with many windings    and a primary  with a few windings .........sense  the windings  are connected  it in effect works the same  as in your picture .

To accurately   make   your  picture of  the LM  into a basic LM   you would have to   move the tap to  one end .........and  erase the other taps .
.......
The secondary  for the one wire LM  can be from one end  of it to the other ......... 
gary

Gary,
I once saw a description of making a crystal radio where the tuner is exactly like this long spool with the taps. (I think I understand this part... I hope)

This was the tuner

Now, I am still confused about your secondary

If the spool with the taps is the primary (and I thought it was the secondary before,) and you have 300 feet or is it 300 turns? Are you stepping this up or down? Is it a filter type of thing?

thanks,

MK1,
thanks for the picture. I missed it before. We posted together, I guess.

It makes me sure I am following this- which is very helpful.
The upper part is how Hazens primary works. The center tap is the same as the twisted pair.

I made a few of them. It makes it much easier to change the number of turns and it only loses a very little bit from the other kind of winding. It is a good enough way to wind the primary, I think.
If a toroid is really just not putting out enough, I know I can go back to the other kind (like the one in the lower part).

thank you,

jeanna

[resonanceman]

@Resonanceman
Hello Gary, thats a good discovery you have made there, using toroids instead of iron to control the output, it would be lighter also.

Just some info for those who maybe dont know, inside "some" electric stick welders is a moving lamination core, it is moved in or out of the main E core to control the Current and Voltages supplied to the electrodes.

Jim

That is interesting .......so my  new  discovery is  ancient history   


gary

[electricme]

@Resonanceman and Mark,

Mark

yes this is  very close to how I made it.

I  taped one end  to something ........and taped the other to something else 30 ft away .      I sanded   a small ariea  of the wire and  soldered on 3 inched of heavier wire .     
I then taped it up  good .....then wrapped  it to the heaver wire ......ran it through a hole drilled in the spool ...........then continued wrapping  the next 30 ft .

Not  exactly unseen   
maybe this  exact application  is  untried ........but similar stuff has been done .
.......I just blended  a few  ideas  that others have had together to fit my own needs.
[quote[

gary

Hi guys, a bit like my 12 CT secondary I made to test my Big 5" Toroid last year?

0236 = coil finished, tags are looped out from side of coil 4 easy access to them, BTW, make them at least 6" long, you can always shorten them later if you need to.
0244 = 12 position selector switch, you cannot use a pot here folks, impossible.

0257 = Finished coil

0259 = The circuit

jim