Joule Thief

[xee2]

@ free

Your circuit as it is will light a 40 watt tube. Just put the tube where your LED and resistor are. One end of tube to one side of large capacitor and the other side of tube to the other side of the large capacitor.

[stprue]

Welcome back, stprue,

As you will see in a few pages, I did! I used the MK1 design. And to note the advice from xee2, When you make a copy instead of going up 60 turns etc, go up 85 turns. That should give you the extra voltage to make it easier than mine.

Note the turns I used. It took 13 turns on the base coil and 3 turns on the collector coil. This is opposite the way I was connecting the primary, but it is really much better.

I may make one as a MK2 instead of the longer 85. It will probably take just as much room on the toroid as the 85 turns up...does. I am still thinking about it.

The newbie wire spools drop right through the center. I used red 24 gauge newbie wire for my "biggo". (a reminder-- that is not the radio shack 30 gauge wire, it is 24 gauge)

It really sings a loud tune too.

welcome back.

jeanna

I see now, and thank you for the welcome back my vaca was great and well deserved.  I think tomorrow I will make a biggo or a different design I have been thinking about.  I will post my results!  I just finished soldering my coil that puts out about 370v +- but I must have either melted a component or connected something wrong.  I have found that if you can't figure out a mistake you need to step back from it for a while and then revisit.  Anyways I cant wait to catch up!

[stprue]

This is it, and I will get it to work!!!

[resonanceman]

I finally  made a Jesus charger .   



I am  short  on time  ..... tonight   I will try to get a picture or 2  posted   tomorow

I am  running it  with one of my LM1s     the transistor is  a 3055    it works great .
Powering  my  60 LED array  it  almost holds  its own   with a battery draw of   .29 A

I  lowered  the  battery draw to .16 A   at  first  both the  battery  and the output  seemed to  be going up ......  but then they  both  started  going down slowly ........very slowly ......but still going down .
I am thinking that  this  helps out in relation to  how  hard the  circuit  is  being  driven ....   

Interesting  ................. just  playing  with it a little  shows that adding  just one  coil for  flyback  and feedback  helps much more than  without the  Jesus charger .
Adding the   secondary  of  another LM in series  with the load  actually  dropped my voltage  a volt ....... adding  the  primary  of that LM in  parralell  with the battery  boosted  my output voltage  about 20 V

This  is not going to charge   with just one  coil for flyback .   but 3 was the lowest number I  have gotten to charge ..... The  LEDs are brighter than without it too .

The  output  voltage keeps  climing  but the  battery  voltage is  going down ......slpwly ....I wonder if  it is  stepping up the volts  and  not providing  enough amps .
This  thing looks  like  a voltage  doubler  to me ......I wonder  if it could  be  used  between my  flyback  coils  maybe that would  boost my  voltage enough to light  a floro .HHHhhhmmm  probably not  a good  idea ...... the  cap I used is only rated for 250 V



Jesus   
Did you try  other sizes of caps between the  diodes ?
Your  drawing  shows a 104K     I used  a 1uF  because it was  what I had  right here .


I just  tried  adding  another  1uF  to  the charger .....did not notice any change .
I put it across the battery .......and gained about 30 V
My array is now running  at 224 V  ........that is  as high as I have ever seen it   ( 84 V is normal )


This must be  very low current ...... I tried a floro ......it didn;t light  and only  got  up to  240V
I tried my christmas tree lights LEDs  ....not  even  a flicker ...... the  fuji  circuit   powered  these lights  pretty well /
The  voltage went  up  to 300 V  for a second  ....I really thought that they would  be  bright .

gary

[nievesoliveras]

I finally  made a Jesus charger .   



I am  short  on time  ..... tonight   I will try to get a picture or 2  posted   tomorow

I am  running it  with one of my LM1s     the transistor is  a 3055    it works great .
Powering  my  60 LED array  it  almost holds  its own   with a battery draw of   .29 A

I  lowered  the  battery draw to .16 A   at  first  both the  battery  and the output  seemed to  be going up ......  but then they  both  started  going down slowly ........very slowly ......but still going down .
I am thinking that  this  helps out in relation to  how  hard the  circuit  is  being  driven ....   

Interesting  ................. just  playing  with it a little  shows that adding  just one  coil for  flyback  and feedback  helps much more than  without the  Jesus charger .
Adding the   secondary  of  another LM in series  with the load  actually  dropped my voltage  a volt ....... adding  the  primary  of that LM in  parralell  with the battery  boosted  my output voltage  about 20 V

This  is not going to charge   with just one  coil for flyback .   but 3 was the lowest number I  have gotten to charge ..... The  LEDs are brighter than without it too .

The  output  voltage keeps  climing  but the  battery  voltage is  going down ......slpwly ....I wonder if  it is  stepping up the volts  and  not providing  enough amps .
This  thing looks  like  a voltage  doubler  to me ......I wonder  if it could  be  used  between my  flyback  coils  maybe that would  boost my  voltage enough to light  a floro .HHHhhhmmm  probably not  a good  idea ...... the  cap I used is only rated for 250 V

Jesus   
Did you try  other sizes of caps between the  diodes ?
Your  drawing  shows a 104K     I used  a 1uF  because it was  what I had  right here .

I tried also from 0.005 to 103k. They all work, but the best performance was with the 104k from RS. It is a green square ceramic capacitor.
The trick lies on the base resistor. Put the best variable resistor you can get there and find the sweet spot.
There is a problem with that circuit though, it can be disturbed easily by any movement of the parts. Even it is disturbed if you put it under a table lamp. It can go up a lot, then down slowly.
Lately I have been not able to make it to stay on the charging state for days as the original one.

I just  tried  adding  another  1uF  to  the charger .....did not notice any change .
I put it across the battery .......and gained about 30 V
My array is now running  at 224 V  ........that is  as high as I have ever seen it   ( 84 V is normal )


This must be  very low current ...... I tried a floro ......it didn;t light  and only  got  up to  240V
I tried my christmas tree lights LEDs  ....not  even  a flicker ...... the  fuji  circuit   powered  these lights  pretty well /
The  voltage went  up  to 300 V  for a second  ....I really thought that they would  be  bright .

gary

Jesus