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Author Topic: Joule Thief 101  (Read 393466 times)

Offline innovation_station

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Re: Joule Thief 101
« Reply #45 on: November 25, 2009, 05:45:37 AM »
 ;D

never saw something soooo kooool   so simple  eh !

here is 1 worlds first public exposed jt!  displaying ou

i built this a long time ago.. 

 ;D ;D

long time b4 the jt thred came along ..  ::)  lol

leds are wired a j says ... a special way ...  ;)
« Last Edit: November 25, 2009, 06:17:24 AM by innovation_station »

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Re: Joule Thief 101
« Reply #45 on: November 25, 2009, 05:45:37 AM »

Offline WilbyInebriated

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Re: Joule Thief 101
« Reply #46 on: November 25, 2009, 11:11:42 PM »
Lol those are some extreme conditions, I was sort of starting to think that a JT needs luck. It makes my joulethief, was pretty close to generic specs, which didn't work look bad. But I'll retry when I have the exact parts and some electronic equipment.
here is the post from the jt thread showing the aircore coil. a toilet paper roll can be used as the coil form, heck you can wind it on a drinking straw if you want. ;)
http://www.overunity.com/index.php?topic=6123.msg143373#msg143373
i dont think i ever posted a picture of the one wound directly on the transistor body but if you would like i can take a picture for you. worth a thousand words or something like that...

Thanks for that info. It will make making the coils alot easier.

Dick.
glad to help.

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Offline innovation_station

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Re: Joule Thief 101
« Reply #47 on: November 26, 2009, 03:12:09 PM »
here a few pictures of tests i did with a neon and 1 wire ..

ist

Offline Mk1

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Re: Joule Thief 101
« Reply #48 on: November 28, 2009, 12:04:25 AM »
@all

Ist made one watch http://www.youtube.com/user/innovationstation#p/u/22/Jiodkjo9hpk

I hope this will help !

First thing tuning, on step one the green coil is put on tight leaving room so that two other coil (for the jt)can be added 180 degrees
apart, the green coil needs to be connected to a diode bridge to get voltage readings .

On step 2 , you start adding jt coils one at a time and check voltmeter every time you put more turns , that way you see the difference it makes continue adding turns until the voltage on the voltmeter start going lower, this will mean you have reached the point where you start messing up with the turn ratio , meaning you add more you get lower voltage.

On more step i do is every time i change the jt numbers of turn i also tune the base resistor , usually a pot of 1k is used, you try to get the highest voltage on the voltmeter . i also keep the voltage data and the resistance at the base by checking the resistance used by the pot in the circuit.

At this point you will know that you have the right number of turns on the jt coil, and the green coil number of turns fitting in the toroid,.

At that point based on results decide to use smaller gauge the get more turns and higher voltage .

You will also have a good idea on the toroid working range.

To make a good design , you need to learn about the toroid first at this point you should have a good idea about doing so.


Step 3 , Start putting pickup coil on the toroid, you need to put the coil on both sides going one way and leave wire to come back over the coil the other way on step 4.Making a cross windings.

If you want more pickup coil , you need to put them all at the same time , so make sure to remember the green coil for the room available  .

Lets say 20 turns fit , then on a mk1 you should have about 20 up then 16 down , mk2 having 2 pickup coils on each side numbers would be 10 up 6 down , you get the idea.

When you need more then 3 pickup coil , twist all those wire into a single one then do it all at once.

Now why the cross windings , you will then have the coil pushing and pulling , you can test it with a led that will now light both ways , it also helpful in charging caps.

I hope did not forget to much, i would really make a video but , i really don't have any money to buy a camera
, and none of my friends have one, but honestly most of my time and energy is on putting food in my stomach.

Mark

How to test dead spots use a single turn pickup coil , then connect it to a bridge and voltmeter and move it around the empty space left on the toroid , if you find a spot where there is no voltage that is a dead spot.

What could i have new to say ?

Nut much , but if i was to try this i would first try to find the best gauge for the jt side (bigger wire ) then try the match them gram for gram , since they will have the same mass and materiel they will share resonance at any freq.

The smaller you go on the secondary side , bigger resistance higher turn ratio for mass , same mass smaller gauge .

I think this will make sure that the current is not lost due to unmatched weight ...

Depending on the winding direction you get different sine wave .

Winding rotation direction , can help setting kick generation (+or-), when working with multiple core.

I hope this will help

Mark



Offline resonanceman

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Re: Joule Thief 101
« Reply #49 on: December 01, 2009, 06:24:27 AM »


Nut much , but if i was to try this i would first try to find the best gauge for the jt side (bigger wire ) then try the match them gram for gram , since they will have the same mass and materiel they will share resonance at any freq.

The smaller you go on the secondary side , bigger resistance higher turn ratio for mass , same mass smaller gauge .

I think this will make sure that the current is not lost due to unmatched weight ...



Mark

How  important  would  you  say  matching   weight is ?   

Do you  know of  a chart or website that  has  weight  per ft  of wire so we can  work out  the  balance  with  different  wire sizes ?

gary

Free Energy | searching for free energy and discussing free energy

Re: Joule Thief 101
« Reply #49 on: December 01, 2009, 06:24:27 AM »
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Offline Pirate88179

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Re: Joule Thief 101
« Reply #50 on: December 01, 2009, 07:05:06 AM »
Just a question.  Is it weight, or mass?  For resonance, I suspect it may be mass, but I really don't know.  I was thinking about Mark's idea here and it makes a lot of sense to me.

Bill

Offline resonanceman

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Re: Joule Thief 101
« Reply #51 on: December 02, 2009, 07:11:47 AM »
Just a question.  Is it weight, or mass?  For resonance, I suspect it may be mass, but I really don't know.  I was thinking about Mark's idea here and it makes a lot of sense to me.

Bill


Bill


It seems to me  you  can use either mass or weight in this case .
Part of the equation is  same metal same weight .
If you were  making a bi-metal  coil the weight  or mass question would  become  important .


gary

Edit

After thinking about it ........ if you  were making  a bi-metal  coil  equivalent conductor volume might  be  the  way to go

Free Energy | searching for free energy and discussing free energy

Re: Joule Thief 101
« Reply #51 on: December 02, 2009, 07:11:47 AM »
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Offline topothemtn

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Re: Joule Thief 101
« Reply #52 on: December 07, 2009, 02:01:59 AM »
Hi everyone. I know this is off the subject but there seems to be quite a few (Electronic Experts) here.

I have a 12v regulated power supply that puts out 2.5 amps. Is there a way to make it output more amps? Like maybe 15 or 20 amps?

Thanks for any help on this.

Dick

Offline gadgetmall

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Re: Joule Thief 101
« Reply #53 on: December 08, 2009, 11:18:58 PM »
Hi everyone. I know this is off the subject but there seems to be quite a few (Electronic Experts) here.

I have a 12v regulated power supply that puts out 2.5 amps. Is there a way to make it output more amps? Like maybe 15 or 20 amps?

Thanks for any help on this.

Dick
Nope . If its rated 2.5 amps that is the maximum you can get out of it

Offline topothemtn

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Re: Joule Thief 101
« Reply #54 on: December 09, 2009, 06:38:37 AM »
Hey Gagetmall. Thanks for the answer. It's not the one I was hoping for LOL; but thanks anyways.

Dick

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Re: Joule Thief 101
« Reply #54 on: December 09, 2009, 06:38:37 AM »
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Offline guruji

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Re: Joule Thief 101
« Reply #55 on: December 24, 2009, 10:39:40 PM »
Hi guys I have a white toroid don't know what is the material. Is this good for JT?
Thanks

Offline Pirate88179

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Re: Joule Thief 101
« Reply #56 on: December 24, 2009, 10:46:28 PM »
If it is painted, chances are it is a powdered iron toroid.  Can a magnet stick to it?  If not, it will not work for the JT.  If it passes the magnet test, go ahead and wind a basic JT circuit on it and see what happens.  They do not take long to make.

Good luck to you,

Bill


Offline Nali2001

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Re: Joule Thief 101
« Reply #57 on: December 24, 2009, 11:02:57 PM »
Hi all, I know nothing about the Joule Thief and since this is a 101 you might want to add what the Joule Thief actually is, and what it is supposed to be capable of and what is special about it. Also maybe some overall efficiency details.

Thanks,
Steven

Offline resonanceman

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Re: Joule Thief 101
« Reply #58 on: December 25, 2009, 12:17:58 AM »
Hi all, I know nothing about the Joule Thief and since this is a 101 you might want to add what the Joule Thief actually is, and what it is supposed to be capable of and what is special about it. Also maybe some overall efficiency details.

Thanks,
Steven

A joule thief is  A simple circuit that is  basicly  a simple oscillator.
The first JTs  that I  heard about  were just  a toroid with a few wraps  of wire in it .......a  transistor, a resistor and a blue or white LED
They  were interesting  because  they can  light the LED  even with a battery that  by normal standards would  be considered dead.

The  JT threads  are all about  what can be done  with the JT circuit
Adding  a secondary  was a big step ........it opened up many doors .

~~~~~~~~~~

I could not  watch  videos  for a long time ......so I do not have any links to  videos that  explain  the basics
Perhaps  someone  that  already  has  links for  good videos  can post  them here for you.

gary

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Offline jeanna

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Re: Joule Thief 101
« Reply #59 on: December 25, 2009, 12:38:25 AM »
Well said, and good idea gary
http://www.youtube.com/watch?v=gTAqGKt64WM
This is how I made my first 3. Then I made some personal adjustments, but this video is clear and easy.
My recommendation is always
watch it 3 times.
first run through
second- start at the 1:05 minute marker and watch it til they start with the jokes.
third time- watch it and predict what they will do.
Then you have it.

The tricky part about the first time is to get the center tapped primary bit.
That is why I say make it their way and get it into your head and hands then make some more.

Then begin to add secondaries and read the loooong thread for lots of info and ideas.

jeanna

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Re: Joule Thief 101
« Reply #59 on: December 25, 2009, 12:38:25 AM »

 

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