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Author Topic: Joule Thief 101  (Read 944148 times)

seychelles

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Re: Joule Thief 101
« Reply #915 on: March 15, 2016, 01:46:17 AM »
can anybody please verify if this type of winding a coil transformer is more efficient than the rest..
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Pirate88179

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Re: Joule Thief 101
« Reply #916 on: March 15, 2016, 02:02:47 AM »
That does not look to me like it will be transforming anything.  Are you looking for step-up?  Or step-down?
This drawing appears to be able to do neither.

I am no expert however...

Bill
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seychelles

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Re: Joule Thief 101
« Reply #917 on: March 15, 2016, 02:08:00 AM »
step up step down coil does not matter, the crunch is in the way this coil is wound..so for the sake of testing wind the coil for a joule thief my way and the normal way and see the difference..
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seychelles

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Re: Joule Thief 101
« Reply #918 on: March 15, 2016, 02:17:24 AM »
for the less fortunate
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Pirate88179

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Re: Joule Thief 101
« Reply #919 on: March 15, 2016, 02:38:08 AM »
Quote from: seychelles on March 15, 2016, 02:08:00 AM
step up step down coil does not matter, the crunch is in the way this coil is wound..so for the sake of testing wind the coil for a joule thief my way and the normal way and see the difference..

I do not think that would work for any JT circuit I have ever made.  I mean, you don't need the toroid or the square if you are just going around the outside of it....right?  The way the photo shows, it would mostly be an air core as very little wire goes around any of the core itself.

Unless I am missing something from your drawing?

Bill
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seychelles

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Re: Joule Thief 101
« Reply #920 on: March 15, 2016, 02:57:32 AM »
yes you have
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Magluvin

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Re: Joule Thief 101
« Reply #921 on: March 15, 2016, 05:33:01 PM »
Before I left the shop the other night, I tried some things and was adjusting the resistor in the range where there wasnt anything to be seen on the scope at all that had to do with switching. This was without the shorted winding. I found a point that the sig appeared and the led lit at low level. But again, it was at the freq of the battery oscillating, not the windings or core.  Sort of happy just getting that for now.

Mags
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tinman

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Re: Joule Thief 101
« Reply #922 on: March 16, 2016, 12:27:23 AM »
@ Mag's-and all.

I will be posting in the new thread from no on regarding these experiments.
First up is to design and build a variable capacitor with a value range between .1uf to 100uf.

http://overunity.com/16486/resonance-circuits-and-resonance-systems/msg477396/#new

Cheers


Brad
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ramset

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Re: Joule Thief 101
« Reply #923 on: March 16, 2016, 12:54:43 AM »
Wow
very nice idea !!



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hoptoad

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Re: Joule Thief 101
« Reply #924 on: March 16, 2016, 11:46:05 AM »
Here's another different form of resonance that I found very interesting to ponder.
https://www.youtube.com/watch?v=IiLplTc8rQY


It would appear that life itself relies on resonance in one form or another.
Cheers
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MileHigh

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Re: Joule Thief 101
« Reply #925 on: March 16, 2016, 01:14:39 PM »
Why don't we just stick to something a bit more tangible?

https://www.youtube.com/watch?v=UGTI5DLM6gQ

https://www.youtube.com/watch?v=1pM6uD8nePo

Clearly many people are not in sync with the concept of a resonating wine glass.  The idea doesn't resonate with them.  How the hell does a bloody wine glass resonate I wonder?  What about a bridge?
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sm0ky2

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Re: Joule Thief 101
« Reply #926 on: March 16, 2016, 05:28:23 PM »
@ mags

nice coils!! 


sorry I was away for a few days so I missed your question regarding the two coil examples.

as intuitive at it seems, many do not get that until they actually try to wind a coil
then realize you can't make them "straight" as in your first example, because the core is round.
every coil has some 'pitch' to the coil next to it, and so on.
even if you completely fill the torroid with wire, there is some pitch.
in fact, the degree of this pitch plays a role in the inductance equations.
and is used to determine the electromotive force vector of the angular current.

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sm0ky2

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Re: Joule Thief 101
« Reply #927 on: March 16, 2016, 05:38:23 PM »
Quote from: hoptoad on March 16, 2016, 11:46:05 AM
Here's another different form of resonance that I found very interesting to ponder.
https://www.youtube.com/watch?v=IiLplTc8rQY


It would appear that life itself relies on resonance in one form or another.
Cheers

as does the existence of matter itself.

and, to a much greater magnitude, entire areas of our known universe.

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MileHigh

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Re: Joule Thief 101
« Reply #928 on: March 17, 2016, 01:43:12 AM »
Look at this, vibrating reed tachometers, a.k.a. vibrating reed frequency meters.

https://www.youtube.com/watch?v=s5wgwvT8boc

https://www.youtube.com/watch?v=iBfzPmrkFYo

They used to put them on big backup diesel generators for buildings with vibrating reeds spaced very close together in frequency.  That way you could see how close your backup generator was to generating 60 Hz or 50 Hz AC mains frequency under load.  For all I know they still use them for big backup generators unless they have been all replaced with electronic frequency counters with digital displays.

How do they do it?  Judging by the 64 pages of this thread, nobody has a clue how they do it except for me.
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hoptoad

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Re: Joule Thief 101
« Reply #929 on: March 17, 2016, 02:23:47 AM »
Quote from: MileHigh on March 16, 2016, 01:14:39 PM
Why don't we just stick to something a bit more tangible?
snip..
  How the hell does a bloody wine glass resonate I wonder?  What about a bridge?
Why don't you just do something tangible and provide answers to your own questions?
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