Joule Thief

[PaulLowrance]

@paul

The corrected circuit is here.

Jesus

Thanks, you replaced the R with a variable R, and added the optional switch to discharge the bcap. If gadget wants I can add the other cosmetic stuff as well such as the shunt resistor for the meter, etc. and even put in pretty meter icon if he wants, but I did not add those because the only focus was on trying to get gadget to explain his unconventional toroid drawing connections, which I and *others* were trying to figure out.

Gadget, calm down. Your keep saying that even your daughter can make one, so please stop with your insinuations and negative attacks. I was trying to figure out the toroid windings in your drawing. Okay? I don't make assumptions in circuits, so stop attacking people who ask questions.

Now I drew your toroid circuit in the correct conventional manner. If you want I can add the other cosmetic details for you to use in future posts. I'm not saying such details such as changing the R to a variable R icon is unimportant, but those are cosmetic details.

Regards,
Paul

[gadgetmall]

Thanks, you replaced the R with a variable R, and added the optional switch to discharge the bcap. If gadget wants I can add the other cosmetic stuff as well such as the shunt resistor for the meter, etc. and even put in pretty meter icon if he wants, but I did not add those because the only focus was on trying to get gadget to explain his unconventional toroid drawing connections, which I and *others* were trying to figure out.

Gadget, calm down. Your keep saying that even your daughter can make one, so please stop with your insinuations and negative attacks. I was trying to figure out the toroid windings in your drawing. Okay? I don't make assumptions in circuits, so stop attacking people who ask questions.

Now I drew your toroid circuit in the correct conventional manner. If you want I can add the other cosmetic details for you to use in future posts. I'm not saying such details such as changing the R to a variable R icon is unimportant, but those are cosmetic details.

Regards,
Paul

Paul No insult intended i just have adiffernt ways of expression . And its true my daughter has built several .
I think everyone can read Jesus Schematic being he has a coil part for his cad program . i did not. i could have used a transformer with a center tap . same thing . just look at the diagram . if you stretch out that toroid vertical you see its center tapped . Thanks for the offer but most don't care about cosmetic as much  as replicating it . And there is plenty of information to do that .

Kind Regards

gadget

[gadgetmall]

No,
I can say it rarely looks like that.


I will make a little drawing.
Bill, I think yours is from the primary across the C-E isn't it?
Unrectified it looks like trees along the street in winter.

______||__|___||_____||____|___|_|_|___|_____||____|__||__|
and they are often as varied for one coil as this is too.

---=========----
I have a pic for a saturday night.
Remember last year when I bought the string o leds and the results were horrid?
I had to have 300 v and still only half of the leds lit dimly.
Then I took it apart and found diodes in the wires embedded in a kind of foam plastic that had obviously been formed around the lights. ick.

I set them aside, and tonight was the night to do the deed.

I removed 34 leds from the rest of the wire strings but kept the single string, so there is 1 wire connecting them all.
I stripped each end and set it into my new high output tiny toroid.
this is the jt whose secondary is giving me 172v and I can tune it higher.

I showed it the other day with a neon. the MK1-jeanna hybrid...
so, I can say this is as bright as the string can be from the wall.
I have one in the wall for comparison, but for now here it is.
This is a lovely lighting for the hallway and around the house or garden.

jeanna

edit
jadaro,
yes it is a little off center. It is usually about 30% below the x axis.
My measurements are from peak to peak so that would not change, but yes, you are right about this.
j

Jeanna  ! very nice . Is that a goldmine little torroid i see there / WoW . And welcome to the hackers tear it and use it wisely club I know you hate to tear up good conventional stuff
I bet this design would work more effectively on the  heater circuit .
Gadget

[PaulLowrance]

I will re-post this here:

http://www.instructables.com/id/Make-a-Joule-Thief/

This is what I used to make my first working basic joule thief.  Very good, clear instructions.  The Evil Mad Scientist labs version was fine except, they were not clear, at least to me, on tying the two end wires together from the bifilar winding.

Bill

Here's a nice video for us newcomers on making a simple joule thief,

http://www.youtube.com/watch?v=gTAqGKt64WM

Paul

[PaulLowrance]

Someone suggested moving the following post into this thread,

Hi,

Does anyone want to share their favorite JT video link?

I haven't seen many JT videos yet, but this one catches my interest,

http://www.youtube.com/watch?v=GFW1d5G6NnM

What do you think?

Regards,
Paul