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Author Topic: Joule Thief  (Read 6333768 times)

drodenbe

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Re: Joule Thief
« Reply #16650 on: October 01, 2014, 06:59:52 PM »
Hi again.  Here with some results of the above circuit I posted earlier.  I have been running this for over 24 hours on a crystal cell.  The cell unloaded was .785 volts.  So I guess one could say that the graph speaks for its self!  The Led is bright and the voltage continues to rise! The voltage is over the resting voltage of the cell!  I do not have any capacitor across the input.  It is just the raw crystal cell and the joule thief.  I have tried all kinds of cells.  Ni cads etc all have been similar results.  So, make one for your self and see for your self!  Thanks.

David

drodenbe

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Re: Joule Thief
« Reply #16651 on: October 02, 2014, 12:10:33 AM »
Well here is the latest graph!  Still going up!  LED Bright!  It now reads 1.138 volts which is higher than when I last saved the graph! 

For those who care.  Feel like I am talking to my self!  Lol!  Later.

David

drodenbe

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Re: Joule Thief
« Reply #16652 on: October 02, 2014, 01:17:37 AM »
Ok guys!  Here is my last post on the above circuit.  I think the graph speaks for its self.  Won't waste any more bandwidth! Later.

David 

Pirate88179

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Re: Joule Thief
« Reply #16653 on: October 02, 2014, 02:49:19 AM »
Well here is the latest graph!  Still going up!  LED Bright!  It now reads 1.138 volts which is higher than when I last saved the graph! 

For those who care.  Feel like I am talking to my self!  Lol!  Later.

David

David:

If you notice at the bottom of your posted photos, it shows how many folks have viewed it.  This one, at this time, says 42.  There are a lot of lurkers here that enjoy reading posts but, remain silent if they have nothing to add or have relevant questions.  This is actually a good thing as you did not have people posting "Fake!", or calling you names as sometimes happens on forums such as this one.

I think you are doing great work here and I, for one, appreciate your sharing it with us.  I look forward to see where your cell tops out at, and how long it remains there, and when/if it drops off.  Please keep us posted and do not be disappointed in the lack of posts in response to your posted work.  As you may know, I am a big JT fan and I love to see them employed in unusual ways, which I believe, you have done here.  Carry on and, the best of luck to you.

Bill

drodenbe

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Re: Joule Thief
« Reply #16654 on: October 02, 2014, 03:19:32 PM »
Bill.   

Thanks for your input.  Yes I have noticed that people are looking at my work.  My comment was not intended to be negative.  Not being involved with any group for a while I noticed some have dried up along with the interest.  I was just testing the waters to see if I was in a dead group so to speak and was talking to my self!  I also did not want to jump into a forum and disrupt the normal conversations between seasoned members.  So with that being said I will continue to share the results. Just in the past month I made this discovery so I am very surprised with the results.  Have spent many hours looking at the 4th and 5th digit to the right of the decimal point on my meter only to see it falling.  Usually I got some kind of a warm feeling if it got past the first hour.  But after an hour or so it went down the tubes if you know what I mean!

I just recently started to experiment again after a long rest from the same old thing.  I have always been fascinated with the JT.  I discovered the positive effects with the inductor in series with the battery and noticed the voltage was staying put so to speak which really got me going.  At the same time I was playing around with the capret and running a LED on different batteries and noticed that the led was lit for months and the battery stayed charged!  So there fore I incorporated both in the JT.  I used another jt coil configuration and as you can see connected the capret into the circuit.  So this is the results.  Blind pig finding an acorn!

I have included the final graph of the last run.  I am including a test I just started on an old crystal cell that was not very successful just to see what would happen.  The voltage of this cell was about .5 volts.  Not real good! But as you can see it is bring it out of the gutter and is charging the darn thing!  Will let run and post the results.  I have limited space, money and equipment.  Will let it run for a day or so then on to another cell.  Will show test results on regular ni cad batteries if you want.

David
« Last Edit: October 02, 2014, 07:01:47 PM by drodenbe »

drodenbe

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Re: Joule Thief
« Reply #16655 on: October 02, 2014, 03:29:18 PM »
Me again!

 If you noticed by the last graph it really looks rough!  With all the fluctuations and all, but as it runs and auto adjusts the scale this will smooth out and you won't be able to see the detail unless you zoom in on an area.  But the important thing is the upward trend.  The LED is not lit yet but will when the voltage gets higher.  The scope peak to peak reading is around 1.5 volts, so when it gets to 2 and above, it should light.  Never tried this before with this circuit so this is my thoughts at this time.  As we all know time will tell.  However I believe that if this voltage comes up to the point of lighting the LED and continues to charge I will have a very warm feeling that this is a success!!!! 

About the first graph I stopped it last night and forgot to save the graph.  My mistake!  It had leveled off to the 1.160 voltage and was running constant for while.  It may have gone up more or less but I feel it was a good test anyway.   Thanks again.

David

drodenbe

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Re: Joule Thief
« Reply #16656 on: October 02, 2014, 07:19:42 PM »
Well here is a new update on my latest run on an old junk crystal cell that was a failure compared to the ones I make now.  I am making cells with aluminum and copper that are producing over 1.volt. Usually around 1.25 volts at about 150ma.  This one was a test of a different mix and idea. Was around .46 to .5 volts at about 10ma.  But as you can see by the graph the cell is coming to life.  The LED just came on a little while ago.  Getting around 1.5 volts Peak to Peak on collector.  Also one other thing I wanted to say is that the .0047 uf cap across the collector JT coil is not necessary to get what you see here.  I am not using any cap across the coil.  I did notice when I was designing the circuit, before I used the capret,  that it did make a small difference.  At that time I wanted all I could get.  Also I found that the charging effect is enhanced if you do not have a resistor in series with LED.  Strange isn't it!  I put the variable resistor in series because it gave me a easy way to change things during design.  I usually make my circuits with small two terminal  pc mount connectors.  In the capacitor position and anywhere I would change something.  Keeps me from messing up the pc board, due to unsoldering, soldering in components during design.  So I have a experimenters board so to speak.  Terminals for the joule thief coil.  Terminals for the base capacitor, terminals for the base variable resistor,  terminals for the transistor,  terminals for input voltage and a possible capacitor across the input voltage.  So Basically I have a board with terminals!!!  Ha! Ha!  How many times have you popped a transistor or wanted to change the pot or cap.  Works really great for design. Then I make a final board when finished.  Well,  Ok.  Later


David

NickZ

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Re: Joule Thief
« Reply #16657 on: October 02, 2014, 08:21:03 PM »
  You might want to check out the Lasersaber site:
http://laserhacker.com/

  He's coming up with new stuff all the time.

  NickZ

TinselKoala

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Re: Joule Thief
« Reply #16658 on: October 15, 2014, 08:13:13 AM »
@Pirate:
Take a look at this. I like the way the little device is mounted right to the LED. Very very simple. Somebody should go ahead and manufacture LEDs with the circuit and inductor built right in.

http://www.muzique.com/news/not-a-joule-thief/

Pirate88179

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Re: Joule Thief
« Reply #16659 on: October 16, 2014, 04:32:26 AM »
@Pirate:
Take a look at this. I like the way the little device is mounted right to the LED. Very very simple. Somebody should go ahead and manufacture LEDs with the circuit and inductor built right in.

http://www.muzique.com/news/not-a-joule-thief/

Thanks TK.  I think I might even have some of those chips but....I am still working with the NCP 1402 which will switch down to .3 volts and output a low ripple 3.3 volts.  I went through a bunch of those newer style chips and my hat is off to that guy for being able to solder it like he did.

I like your idea and the led folks should pay attention, although the Chinese are probably already doing this.  It would be great to spend a few cents more and buy an led, or leds, that already have the modern day JT type circuit "built in".  I do wonder, however, what would the problems be if using say 3 of them in series?  Would each led "circuit" work independently or would there be a problem in the sync between all of the different occilations from the 3 different inductors?

To me, this is really cool stuff that is coming out now about the JT style circuits.  These new chips give us even more areas to explore.

Thank you for posting this and showing me.

Bill

MarkE

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Re: Joule Thief
« Reply #16660 on: October 16, 2014, 04:39:16 AM »
Bill you would not want to put them in series.  They would have a very hard time starting up.  These sorts of things should be connected in parallel.

Pirate88179

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Re: Joule Thief
« Reply #16661 on: October 16, 2014, 05:16:48 AM »
Bill you would not want to put them in series.  They would have a very hard time starting up.  These sorts of things should be connected in parallel.

Thanks Mark.  So, if connected in parallel then the 3 oscillations do not have to in sync?  I ran into this a few years ago when putting 2 Fuji JT circuits together in parallel.  On the am radio, you could hear 2 different oscillations going on...one was climbing up while the other was falling...and so on.  I guess I did not have synced resonance which is why I did not achieve overunity like those QEG folks, ha ha.

Bill

MarkE

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Re: Joule Thief
« Reply #16662 on: October 16, 2014, 08:22:57 AM »
Thanks Mark.  So, if connected in parallel then the 3 oscillations do not have to in sync?  I ran into this a few years ago when putting 2 Fuji JT circuits together in parallel.  On the am radio, you could hear 2 different oscillations going on...one was climbing up while the other was falling...and so on.  I guess I did not have synced resonance which is why I did not achieve overunity like those QEG folks, ha ha.

Bill
No they don't need to sync.  Ideally, they would be offset 1/3 of a cycle from each other.  Since they are not, a capacitor can smooth things out. 

You did not have enough people humming properly to achieve resonance.  For just $15,000 donations for my wife and I to fly to Hawaii first class I can advise you on how to get better resonance.

Dave45

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Re: Joule Thief
« Reply #16663 on: October 17, 2014, 03:27:25 PM »
Works, the feedback winding will run both transistors.

Dave45

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Re: Joule Thief
« Reply #16664 on: October 17, 2014, 03:40:44 PM »
Works