Joule Thief

[xee2]

Some videos from Lidmotor showing his versions of the battery swap JT.

http://www.youtube.com/watch?v=xrwQJ7oM9ZI&feature=PlayList&p=BD0E85F83F9482F2&index=3

http://www.youtube.com/watch?v=82cOfAWYYKY&feature=PlayList&p=BD0E85F83F9482F2&index=7

[jeanna]

@Jim,
That video tells the story. Great!

How many volts does your meter see from your EB?

@Gadget
bon apetit ! 

@xee. I finally remembered to order a couple of those ger transistors from the gadget. Thanks for reminding me.

@Altrez,
Love those empty volts. Keep it going.
It always makes me think of the emperor wearing no clothes...

@Bill
me too. this was a fast mover last night.

jeanna

[nievesoliveras]

@all

Long time no post.

This is a schematic of a self charging Joule thief. The  battery runs the JT and the JT charge the battery back some points below its original starting voltage maintaining a balance indefinitely.
But if you add an LED it does not light.
It does not discharge the battery either.

Can you test it?
If it works as stated.
Can you improve it to work with a pickup coil that uses the same energy used by the original circuit and at the same time lights something?

I know that you have done it. I mean the pickup coil that uses no more energy than the one spent by the original JT and lights something for free.

Thanks in advance and congratulations to all that have had a successful replication of any kind of joule thief from this topic.

Jesus

[stprue]

@ gadgetmall

With so many people working on earth batteries perhaps you could post some JT results you have gotten using the germanium transistors to convert a 0.2 volt input into a 1.5 volt (or more) output for charging the super caps. I think a lot of the earth batteries do not always put out over 0.5 volts and thus will not always run a silicon transistor JT.

What is the max voltage input a germanium transistor can take?  Do you loose a lot of current during the .2 to 1.5?

These must be hard to get because they sound great and would help get a lot closer to OU.

[altrez]

@ALL

I had a major brake though! I have the JT in what looks to be self oscillating / resonating mode! Here are my notes with how I found it.

Thursday, May 28, 2009

This morning when I left for work. I adjusted the 10k Pot to what I can only describe as resonating or oscillating mode.
Watching the meter and adjusting the pot I found a sweet spot where the voltage would
jump up and down about ever few seconds. form 0.003mv to 2.013V those are ruff estimates. I am using
a TIP31 a Large coated Toroid rated at 5000 permeability a 10k pot and a small ceramic capacitor. I have a diode bridge that is connected to one pickup coil.

I have also noticed with this circuit configuration that I call the "LLA1" the main battery is slightly recharging itself as well.
/end notes

So that is where I am so far. The battery is charging faster and it seems to be drawing less energy to charge.

More to come!

-Altrez