Joule Thief

[stprue]

I get interesting effects when I expose my JT toroid's to external magnetic fields. Like a DC field from a strong NdBFe magnet, or a strong oscillating field from an externally driven electromagnet. The LED changes color!!

No, not really. 
But it does vary in brightness a lot, all the way from off to berry berry bright, so I know varying the saturation level of the flux in the toroid can change the behaviour of the circuit. I think this might be a way of simulating the effects of different permeability materials using a single toroid.

Yes I think you are right in this statement!  Subjecting a mag field will also change amp draw and resonance effects.  I think it is worth dabbling with mags in regards to these coils.

[stprue]

@stprue

Hello Stprue,
Yes, I have begun construction.
In the photos, you should be able to see a heep of diodes, I put 1 diode per output coil, this when jury rigged with hand pulsing, I can charge up a 1000uF 16v capacitor.

I need to modify each section as seen on my circuit, make up 7 bridge diodes to take their place.
The single diode was there, just to "prove" it works, it does.

I need to add a battery or super cap to the output of the circuit.

What I have'nt done yet is to design and make a timing circuit, to take the place of my fingers making and breaking the circuit.

Then I need to make another part of the timing part to allow the 7 caps to dump their energy into the super caps, this has to incoroperate a "time" constant. If it is set too low, the supercaps will not fill properly, and I have to put blocking reverse diodes to prevent the discharge of the supercaps back into the circuit in case a component goes wonky.


Thanks for the inquires.

EDIT, I re-read your question to me, I miss read your original question, I see you are referring to my circuit I posted wayyyy back, which was made on TinyCad, (its a free program), so my answer should have been "no", I havent begun to make that circuit, but, some of its parts are being incorporated with my present one.
I will get around to making it, but I wanted to see if other ideas I had worked first.
This is the trouble of inventing, I have so many I want to do I get stuck on 0, lol

I should fire-up TinyCad and make a proper circuit of my present work with it.

jim

This is the project on tcad, and I see the obvious differences, I just remembered it looking similar in my head anyway.  What are you going to use for your timing circuits?  555 DPMS (DPMS Something like that) or a combination?

[TheNOP]

That is a really interesting way to look at a ferrite.  Do you think it would be possible to have several cores set up exactly the same way, power one of them and have all the others resonate as well?  maybe not it seems like these cores vary from one to another even if they are the same like the 5 for 1$ goldmines!

that is true, no ferrite will resonnate at the same frequency.
but their resonnating frequency should be relatively close to each other if they are from same batch.

ressonnance have more then one effect, one of them is energy compression.
problem is, you can't tap that energy off without turnning the ressonnance effect off.
trying to use the energy will lower the energy compression effect, if not kill it completly.
if the resonnance is not used for its compression effect, then its other effect can by usefull in a circuit.

if you want to prouve me wrong on this, you will be better trying with Dr Stiffler SEG then trying with a jt.
those 2 are using different ways to basicly get the same end results.

[hazens1]

Here's my latest coil using the Goldmine 5 for $1 toroid. This is untested, I need to get some other stuff done before I start playing with it. I spent about an hour winding this.

3 Turn Base Coil
7 Turn Collector Coil
150 Turn Pickup Coil

Pickup coil is wrapped up then down. From the end of the Collector coil to the start of the Base coil back to the end of the Collector coil.

Stay tuned... Until then, enjoy the pics!

[Pirate88179]

It is a good idea to put a led in the usual led spot (BJTL) to be sure everything is working and there are no surprises. Then take it out. that is fine.
The secondary is producing AC, so you won't get it all unless you rectify it.
So, my question always is, why bother with making the ac if you are just going to rectify it.

AC has special properties which we in this modern world (except for theNOP of course) don't know much about.

It is this secondary that will light 30 to 100 lights for little more than the amps cost of 1 and often the amps draw actually goes down when you do this.

OH Bill, I am so glad you are going to do this!


I am not sure, but it sounds a lot like my 2 tier circuit.
You will be fine. The thinner wire allows for more turns but 20 or 30 is ok to see the concept. Remember it was only 1 turn that lit a led in january. I figured for good brightness it was best to plan about 3 to 5 turns per led when making a secondary.

jeanna

I am trying to post my results from today and the site won't take my post. Hopefully soon.

Jeanna:

I want ac as the output like I am using now, so I don't think I want to rectify it.  My next goal is to light a flouro tube from my earth battery.  It appears I don't have quite enough grunt to fire the Fuji circuit so, I am looking for a higher voltage ac output than my regular JT circuit is giving.  Unless I am mistaken, I can use all of the ac and don't want to rectify to eliminate half of it.  Of course, I could be wrong....it has happened before, ha ha.

Excellent charts by the way.

Bill