Joule Thief

[jeanna]

@ jeanna

Yes I mean turns on collector coil (see my diagrams).

Well, I mean in person, so to speak. The diagram says 40 turns on your diagram. Is that the collector coil?

thanks

jeanna

[nievesoliveras]

WOW,
I started to make some new tests on the 5+12 with 120 turns secondary. It still has a 47uF cap in the battery rails. (I think it was xee2 who said to put a large cap across the battery to keep the battery going longer and the jt stronger. ) It was still there. I was just reviewing what still needed to be looked at, when my eyes fell on a jt circuit that I made a while back that has 20 turns secondary and 2 lights soldered in place.

For unknown reasons ( ) I stuck the red pos lead of this extra joule thief ckt onto the red battery lead on the breadboard which was still measuring the amps and saying .254v (meaning 26mA). I held the black lead to the negative lead of the cap and this extra joule thief lit up very brightly. squint time. And a glance over to the volt meter to see the amps showed it was the same.

I don't know if this cap will ever run down, but I have clipped it in place. And now I will hand draw this ckt for my records.

I guess I need to load up photoshop.

Wow,

So, it would seem to be the same as connecting both + and - of the second jt circuit to the + and - pins of the cap.

But if I do that, I get the lights flicker dance thing. Instead this is solid on the + battery lead and then the - of the cap. There is no flicker dance. Just 2 sets of bright lights.

And no extra amp draw.

Any questions?

jeanna

Lady @jeanna
My questions is:
Can you post your hand draw circuit for us?

Jesus

[innovation_station]

Lady @jeanna
My questions is:
Can you post your hand draw circuit for us?

Jesus

i was about to ask the same thing ... 

my solar light stick has taken shape and i will post tonight

cheep and easy to build... can get everything at dollar ramma  but the camera ....

ist!

[jeanna]

@jesus,

I will have to install photoshop to use my tablet also. I will do it, but in a bit. It is already 4PM and I need to do some things before I can get to it.

I will try once more with words.

Take the drawing you called jeanna's idea. make a second copy of that. Cut off the battery and the 10 r resistor.

On the first drawing add a 47uF cap across the battery.

Move the second drawing into place so the cut battery lines connect to the pos and neg sides of the 47uF cap.

Now, move the line that goes to the pos side of the cap to the battery side of the 10r resistor.

here is the jeanna's idea I am talking about. I will delete this when you have it for clarity sake.

Thanks ,
jeanna

[gadgetmall]

Darn,
You tried to get a joule thief to turn on the peltier device?
Are they all  made specifically for 12 volts?
jeanna

Yep a pelitier will light up several Jts in parallel .also tried a fugi it works too . I took ice and put it in a bowl ,sat  a heat sink in the ice with a module on it . Then took my hand and warmed the exposed side . It lit about .5 volts .. I stuck a metal cup with hot water on it and it ran up to 3+ volts . it was enuff to light 3 jts and a fugi