Joule Thief

[resonanceman]

Jeanna

OK
I will  try to keep this  simple .........but be prepared to be confused   anyway .

choose  any 3 consecutive taps  for your  primararys    ..... with this particular  coil  that makes the   primarys 90 ft long .

For maximum  voltge     you need the  secondary to be as long as possable  .....so  lets   go with 300 ft . 
The   magneitc  flux induced  by  your primary  coils   will induce voltage in ALL the other coils ........ the  fact that   some of those  coils are also the  primary  doesn't seem to matter much .
The   current is induced where it is induced ...... 

I am sure that there is  some  " leakage "  between  coils ......maybe quite a bit ............but it is not  noticeable in the  behavior of the JT
The  LED  was brighter  than  my  other LMs
It may suffer in its ability  to  output power ......it is to soon to tell  about that


gary

[resonanceman]

OK thanks.
It is very clear.
and then who cares if you are lighting lots of lights with just a bunch of coiled wire?

this is 1.2v battery isn't it?

jeanna

Jeanna

I am glad that you understand now

I find that  when I  try to explain something in detail        I end up learning it all over again at a deeper level .


Now ........a question I have to ask is .
If  we can use the entire coil as a secondary  on the one wire  LM ........why can't we use the whole  coil every time with every JT ?


gary   

[Mk1]

Now ........a question I have to ask is .
If  we can use the entire coil as a secondary  on the one wire  LM ........why can't we use the whole  coil every time with every JT ?

I personally think its a waist of wire , i can get better result with 30 inch on my toroid , and even less, if you use a 30 feet primary how long would a secondary to get reasonable gain ratio, charging a battery its good but some are a bit confused , a circuit that only charges battery is useless , if you don't use the battery then it stays charged , you don't need a charger for that .


I have a question , how can you have secondary since all the coils are connected together.


Mark

[jeanna]

I find that  when I  try to explain something in detail        I end up learning it all over again at a deeper level

I love how that works! I am glad I could help!!  .

....why can't we use the whole  coil every time with every JT ?

1- Why do you think we don't?
and
2- Take a look at the 2 tier circuit. Follow the path of the currents.. they actually do have sections that operate at an enhanced or diminished rate.

Thanks for the reminder. I promised a drawing.

jeanna

[TheNOP]

Back then, they called this "make and break".
We are unfamiliar with that term, but before the 20th century, the electrical engineers had to use sparks... for everything including proving there was electricity in the wires.

When Stubblefield referred to the 'normal make and break' we were all puzzled. If you look at some of the writings from back then, you see make and break are referring to sparks, or spark gaps.

i think the "make and break" was a rotary swithching device, kinda like relays.

the reason i think this, is that spark gaps need relatively high voltage to start sparking.
hv was not really what was used the most at that time.
in some researches perhap, but not mainstream.