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Author Topic: Joule Thief  (Read 5812557 times)

Offline guruji

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Re: Jule Thief
« Reply #10995 on: December 22, 2009, 08:08:35 PM »
now climbing to 1.276V.
the battary NI-CD AA700mAh recharge itself !!!!!!!!!!!!
I cant belive my eys. all parts from tv, from skip. I have only multimetter, breadbord and soldering tools.
I cant ajust properly it, but its gooooooooo

Hi Tysb3 thanks for sharing what transistor you're using?
Thanks

Offline xee2

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Re: Jule Thief
« Reply #10996 on: December 22, 2009, 08:19:54 PM »
I graphed some data from JT I have built. It seems like there is not much point in using more than about 150 turns. I plan to add another data point at about 150 turns. I think this would be a valuable thing for jeanna to check me on. She is good at catching my mistakes. This data is with 2 base and 10 collector turns and a 2N3055 transistor.

EDIT: This result may be due to not having enough battery current. I wll try to test that.

EDIT: Using 2 D-cells and a 10,000 uF capacitor in parallel for a power source pushed to voltage with 250 turns up to 701 volts. So there is some performance limitation due to battery current, but not enough to be the main cause.

« Last Edit: December 22, 2009, 10:02:29 PM by xee2 »

Offline broli

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Re: Jule Thief
« Reply #10997 on: December 22, 2009, 08:34:10 PM »
xee2 have you tried a higher current rated transistor? I think jeanna's big succes has to do with this, more current = more magnetism = bigger collapse. That is if transistor gets saturated before the core does.

Offline xee2

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Re: Jule Thief
« Reply #10998 on: December 22, 2009, 09:03:00 PM »
xee2 have you tried a higher current rated transistor? I think jeanna's big succes has to do with this, more current = more magnetism = bigger collapse. That is if transistor gets saturated before the core does.

Yes. More current will produce higher output voltage until something saturates.

This was a test of voltage vs turns with everything else constant. Not a test to see how much voltage I could get. The point is that it seems like there is a diminishing return for adding more turns.

EDIT: I know I can get over 1000 volts out using the toroid and the same transistor, so I do not think these test results are due to saturating the core or transistor. But, I also do not understand why the voltage is being limited. In a normal transformer the voltage keeps increasing with turns until the core saturates. I had expected that to be the case for the JT also, but it does not seem like the JT works that way. Of course my data might be bad.




Offline tysb3

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Re: Jule Thief
« Reply #10999 on: December 22, 2009, 09:17:39 PM »
@ guruji
transistor is D1885 from tv's line transformer

Offline tysb3

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Re: Jule Thief
« Reply #11000 on: December 22, 2009, 09:59:32 PM »
Hi,
now my baby is runing untouchible  about 20 hours.
from the start meter was showing 1.274V, now its climbing to 1.275V.
it is still same  LED diode brightnes (not so bright), same frequency (about 10 Hz )
« Last Edit: December 22, 2009, 10:22:04 PM by tysb3 »

Offline xee2

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Re: Jule Thief
« Reply #11001 on: December 22, 2009, 10:06:28 PM »
@ tysb3

(about 10 Hz )

Does that mean that the LED is blinking fast?

Offline crowclaw

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Re: Jule Thief
« Reply #11002 on: December 22, 2009, 10:25:04 PM »
Hi All, this is my first attempt at posting a pic! My Xmas party piece.
« Last Edit: December 22, 2009, 10:51:24 PM by crowclaw »

Offline xee2

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Re: Jule Thief
« Reply #11003 on: December 22, 2009, 10:30:29 PM »
Hi All, this is my first attempt at posting a pic! My Xmas party piece.

Pictures work best if reduced to 640x480 before posting.


Offline tysb3

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Re: Jule Thief
« Reply #11004 on: December 22, 2009, 10:30:42 PM »
@ xee2
yes, its fast flashing

Offline crowclaw

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  • Posts: 327
Re: Jule Thief
« Reply #11005 on: December 22, 2009, 10:42:45 PM »
Pictures work best if reduced to 640x480 before posting.

Whoops... what did I say, I'll have another go... sorry It is my first time.

Offline crowclaw

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Re: Jule Thief
« Reply #11006 on: December 22, 2009, 10:53:16 PM »
Pictures work best if reduced to 640x480 before posting.
@Xee2
Thanks  Merv

Offline xee2

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Re: Jule Thief
« Reply #11007 on: December 23, 2009, 12:29:03 AM »
@ crowclaw

Xmas party piece.

I assume that a JT is built in. Nice job. Did you say it was powered by your new wireless power invention and sell stock in your company? I bet they would have believed you.

« Last Edit: December 23, 2009, 01:11:50 AM by xee2 »

Offline Mk1

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Re: Jule Thief
« Reply #11008 on: December 23, 2009, 12:44:49 AM »
I graphed some data from JT I have built. It seems like there is not much point in using more than about 150 turns. I plan to add another data point at about 150 turns. I think this would be a valuable thing for jeanna to check me on. She is good at catching my mistakes. This data is with 2 base and 10 collector turns and a 2N3055 transistor.

EDIT: This result may be due to not having enough battery current. I wll try to test that.

EDIT: Using 2 D-cells and a 10,000 uF capacitor in parallel for a power source pushed to voltage with 250 turns up to 701 volts. So there is some performance limitation due to battery current, but not enough to be the main cause.

Nice graph , i have a question for you , at some point you say its useless to put more turns on the pickup, once you have reached that point could you try bigger gauge wire on the jt side to see if it gives you the same voltage.

I hope this make sense , really nice work there , as usual , Thank you !

mark

Offline Pirate88179

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Re: Jule Thief
« Reply #11009 on: December 23, 2009, 12:55:39 AM »
@ crowclaw:

Nice job!  What are you powering that with?  It looks good.

@MK1:

I am wondering the same thing.  On my Jeanna Light toroid, I removed the 28 ga. magnet wire (13 turns) on my collector coil and have replaced it with 22 ga. insulated stranded wire and I started at 13 turns and have been removing them one at a time.  As I remove the turns, my volts go up but, my feq. has dropped evidence by my decent zap the other night with my fingers.

Xee2 said my freq. should be going up while removing collector turns and he is probably right because I may have dropped way down in freq. just by making the wire gauge size change on the collector and now as I remove them it very well could be going up.  Actually, I believe it is now that I think of it.  My buzzing is now almost so high you can't hear it.

Bill