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Author Topic: Joule Thief  (Read 6276398 times)

Groundloop

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Re: Jule Thief
« Reply #15915 on: December 07, 2012, 06:00:10 PM »
Finally the pictures could be displayed, though the sizing seems terrible. :P

Please help to verify my findings...

bs2012,

I did  fix the scaling of your JT drawings, thanks for the post and welcome to the forum. :-)

Please go here: http://www.irfanview.com/

and download the irFanView program. In that program you can scale your drawings. So if you make a drawing
in say, Windows paint, then you can scale the drawing in irFanView and convert the drawing to gif or jpg before
upload to the forum.

GL.

evolvingape

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Re: Jule Thief
« Reply #15916 on: December 07, 2012, 06:35:45 PM »
Download Apache OpenOffice:

http://www.openoffice.org/

Make your drawing with the easy to use drawing program.

Save the drawing as PDF using the little pdf button in the top bar, to your desktop, or wherever is easy to find for you.

Convert the image from PDF to JPEG using PictureResize:

http://www.pictureresize.org/online-images-converter.html

Resize image from JPEG to PNG using ShrinkPictures:

http://www.shrinkpictures.com/resize.php

Set quality to best, experiment with best resize for upload display.

Have Fun!  ;)







WilbyInebriated

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Re: Jule Thief
« Reply #15917 on: December 07, 2012, 10:14:29 PM »
or... if you don't want to or cannot download programs, goto  www.pixlr.com  and use their web-based graphic editor.

bs2012

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Re: Jule Thief
« Reply #15918 on: December 07, 2012, 10:34:02 PM »
Thanks everybody for your kindly assistance.

I am eager to look for somebody to replicate the circui and to verify its efficiency.  I do not have any scooe to test it...

TinselKoala

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Re: Jule Thief
« Reply #15919 on: December 08, 2012, 12:38:28 AM »
@bs2012 :
It looks to me like another version of the "ghost light". I've found that if the oscillation frequency is high enough the LED will glow dimly, even with one wire disconnected and no earth ground connections. Touching fingers in various places makes it get brighter or dimmer. Current drain is low when this happens, and it's difficult to scope because the system interacts with the scope's ground lead and even with the few tens of pF of the probe's own capacitance. I don't have coils of the specific turns ratios, so we know who "will be" rolling in his coffin if I try to do any work with the coils that I do have.... but I'll see what I can see anyway. Thanks for posting the images and getting them cleared up.


ETA: Irfanview is a great program, it views images and movies and even text files of all kinds, handles .tiff files fine, etc.

Djoko

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Re: Jule Thief
« Reply #15920 on: December 08, 2012, 02:54:35 AM »
Don't be disappointed with the deem light with this setup.  Just disconnect the led with the emitter leg of the transistor and then jam this open leg with the open wire of the base coil.  The led would be super bright.  Even brighter than with any of the jt I have!  However the battery drain is about 30% higher than the jt, measured at about 120 mA.  With some tuning, it could be reduced to around 70mA.

Hi bs2012,
The JT Jamed Circuit looks like LaserSaber's Super Joule Ringer 3.0. Am I Correct?

Cheer
Djoko

bs2012

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Re: Jule Thief
« Reply #15921 on: December 08, 2012, 03:43:10 AM »
Hi bs2012,
The JT Jamed Circuit looks like LaserSaber's Super Joule Ringer 3.0. Am I Correct?

Cheer
Djoko

Just compared and seems it is.

Actual I would like to attempt to jam the led leg back to the battery and charge it.  Certainly it is failing at the moment but I accidentally found that led is super bright if connected to the base coil.

Still experimenting how to tune jt and self charging jt.

TinselKoala

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Re: Jule Thief
« Reply #15922 on: December 08, 2012, 11:11:51 AM »
Timed rundowns from known voltage levels provide a good measure of total input energy and average power dissipation over the timed intervals.

http://www.youtube.com/watch?v=e5G0PyJsoyo

I get the start energy at 1.500 V as 3.375 J and after 290 seconds at 0.750 V it's down to 0.844 J, for a total input energy of 2.531 Joules over the 290 second period, for an average power of 2.531 J PER 290 seconds == about 8.73 milliWatts average input power.

Lakes

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Re: Jule Thief
« Reply #15923 on: December 08, 2012, 12:10:30 PM »
Good stuff Tk.

Anyone want to try one of those LED "shaker torch" things with this?
http://www.amazon.co.uk/Rolson-Tools-60753-Shaky-Flashlight/dp/B000WDTIEO/ref=sr_1_1?ie=UTF8&qid=1354964803&sr=8-1

gadgetmall

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Re: Jule Thief
« Reply #15924 on: December 08, 2012, 07:52:53 PM »
Just compared and seems it is.

Actual I would like to attempt to jam the led leg back to the battery and charge it.  Certainly it is failing at the moment but I accidentally found that led is super bright if connected to the base coil.

Still experimenting how to tune jt and self charging jt.
Hi .. That is very similar to My circuit posted several pages back . i use the base emitter to obtain a 1/2 ua current draw for a what led . That circuit will blow white leds with a charged 1.2 battery thus the need for a high resistance pot  ..

Qwert

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Re: Jule Thief
« Reply #15925 on: December 08, 2012, 09:33:03 PM »
While I'm wandering at ancient threads of this forum, I've stumbled upon this post, where a guy named "kames" refers to a guy named Zoltan Szili and his circuit. I guess, it can be related to the spirit of this thread:

http://www.overunity.com/712/the-master-of-magnetics-steven-mark/msg4638/#msg4638

here is this circuit and accompanying text:
https://docs.google.com/document/d/1UiMUcZ1JZc1YDUt5Z6SCas-3qV0fLX14qanxFULQSq4/preview?pli=1

bs2012

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Re: Jule Thief
« Reply #15926 on: December 08, 2012, 11:44:51 PM »
Hi .. That is very similar to My circuit posted several pages back . i use the base emitter to obtain a 1/2 ua current draw for a what led . That circuit will blow white leds with a charged 1.2 battery thus the need for a high resistance pot  ..

Do you mind post the link to that page or post the circuit again.  Many thanks.

gadgetmall

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Re: Jule Thief
« Reply #15927 on: December 09, 2012, 12:13:03 AM »
Do you mind post the link to that page or post the circuit again.  Many thanks.
Hi . It has been Modified by Tk also . your is slightly different too.

xee2

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Re: Jule Thief
« Reply #15928 on: December 09, 2012, 02:59:10 AM »
Timed rundowns from known voltage levels provide a good measure of total input energy and average power dissipation over the timed intervals.


Excellent video. That is a nice clock to have. You may want to look at the equations in this video for how to compute average current from capacitor voltage change >> http://www.youtube.com/watch?v=LQinhM1CxkM



gyulasun

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Re: Jule Thief
« Reply #15929 on: December 10, 2012, 10:56:09 AM »
Good stuff Tk.

Anyone want to try one of those LED "shaker torch" things with this?
http://www.amazon.co.uk/Rolson-Tools-60753-Shaky-Flashlight/dp/B000WDTIEO/ref=sr_1_1?ie=UTF8&qid=1354964803&sr=8-1

Be careful with the buying of such shaker torch lamps because in 99% of the cases it does include two CR2032 type button cells! And it does NOT include any supercap, only a 47uF or 100uF normal electrolytic capacitor if at all.
(Just read one of the costumers letter: the lamp was left accidentally ON for one and a half hours and still was ON without any shaking.)

Gyula