Joule Thief

[Cap-Z-ro]

@ IST

Re:  005.JPG


Looking at your set up, I wondered it would increase the performance of the caps and the circuit if the wire was also coiled around each cap all the way around.

Regards...

[jeanna]

I just  got  my 90 LED array and  a CFL to light at the same time.
The CFL was not very bright .......but it was lit .

Excellent Gary!

Good going!
CFL's seem to be harder to light than the tubes, also. Very good.

Jeanna

I think  what  you are doing here is   impedance matching
If you think about it   the  electrons will always take the easiest  way ........... 

Well, that is what is curious about this.
I would think a straight connection would take preference over the impedance of the extra coil in between. It is
secondary wire(|) coil ($) leds in series (D_D_D) secondary wire(|)

so it draws up like this

|_$_D_D_D_|  It is all in series.

I played with a tank today and I did find a cap that increased the light output from the leds.
The odd part is that the voltage across those leds decreased by about 3v from 13v to 3v at the same time that the lights increased!

Someone else (altrez? stprue?) saw this the other day and asked but no one came forward with an idea about what was happening.

Do you have a way to explain this? I am pretty much wandering, and I could use some input if anybody knows what could cause this?

So, Gary, (or anybody else who knows)please talk to me about impedance matching.

Thank you,

jeanna

[innovation_station]

ok so i have all the caps running proper i want to add the next cap off the bigone what is the best way to isolate the big cap from the small 1

i want to sneek 1uf from the big caps  and dump the 1 uf 50vdc cap to the mk2 rings ...

i soldered 1 small cap on there with a diode between but when i drain the 1uf cap the big one also drains ...

call me dumb ... but i have NO SCHOOLING IN THIS STUFF... 

and if i did i dont remember ... lol

maybe i need a resistor i dont know for sure i would sooner look dumb and ask for help than mess a round for days figureing it out ... 

ist!

i bet i need a common ground to the aaa battery for my 1uf caps..  were just splitting the pos here 

lol   just lke the cam units...

[resonanceman]

Excellent Gary!

Good going!
CFL's seem to be harder to light than the tubes, also. Very good.

Well, that is what is curious about this.
I would think a straight connection would take preference over the impedance of the extra coil in between. It is
secondary wire(|) coil ($) leds in series (D_D_D) secondary wire(|)

so it draws up like this

|_$_D_D_D_|  It is all in series.

Jeanna

are you talking  about  some of the LEDs in a string not  lighting ?
I thought  we  were talking about  only one  secondary  working at a time .

I think it is the same problem ...... most of the current will follow the path  with least resistance .

LEDs in series  could be matched with resistors .......but it would be alot of work

I played with a tank today and I did find a cap that increased the light output from the leds.
The odd part is that the voltage across those leds decreased by about 3v from 13v to 3v at the same time that the lights increased!

Someone else (altrez? stprue?) saw this the other day and asked but no one came forward with an idea about what was happening.

Do you have a way to explain this? I am pretty much wandering, and I could use some input if anybody knows what could cause this?

So, Gary, (or anybody else who knows)please talk to me about impedance matching.

Thank you,

jeanna

I have noticed  quite a few times when   the voltage went down   and the lights  got  brighter . 
This may be  due to frequency ........but I think it is more likely   transformer  action .
Less  voltage but more  current .
I  have  driven my arrays at 250 V and still not  had  them at  full  brightness
If  I had full current  they should have been as  bright  as  running from  a wall socket at  a simalar  voltage .  .



I have  posted a couple  of  pictures 

The  first one is my  Flyback transformer core  JT
The second one is  a  circuit  with  several  LM coils for  flyback and feedback
The  last coil on the right  is not connected for feedback    in this  picture  the  secondary  of this coil is connected .
The  LED array  is  dim..... the  floro is taking most of the power .
Notice the pattern in  the LED array .
This array is driven in 4 sections .......the  sections were not matched  very well  so    you can see a  very noticeable   pattern in the LEDs


In the  3rd picture   I have moved  2 wires .   I have changed the  connection  of  the last  coil  on the right from its secondary  to its primary ....... ( much lower impiedance )
The  floro  has gotten dimmer  the  LED array  much  brighter .
This  is  at or  maybe  slightly brighter than   if it was plugged into the wall .
Notice at full brightness  the  missmatched   driver sections  don't  make much difference in the LED array .

I  arrived at this balance just by  trying  different  coils and seeing what works .




gary

[Pirate88179]

@ Gary:

Very nice work there!  This is looking good.

Bill