Joule Thief

[jeanna]

thanks

An issue with it is that the salt in the water settles at the bottom of the glass after a while, and when this happens the voltage drops off and the mA drops down significantly, the water becomes less conductive and thus the chemical reaction between the copper and galvanised screws become less.... is there any ways I can fix this? make the water and salt stay mixed.. Sea water might be a solution?

Hi poit, (and welcome!)

I agree with jesus. The boiling water will allow more salt get and stay in the solution without dropping to the bottom even after it cools.

It is also the surface area that determines the amount of mA the circuit will give, and I have been wanting to add a copper scrubbie stuffed inside my copper pipe to add the surface area.

Lidmotor did this with a galvanized scrubbie and made a simple (0.7v) galvanic battery which did well, so I want to see if the extra copper surface of the added scrubbie will add to the mA.
Lasersaber said he gave up on the copper, and used a carbon rod because his mA maintained a higher level.

I might have time today and might not, so I am passing my idea along for anybody to try.
It is very telling to use one of these galvanic batteries with the joule thief.
I think you get the real story of the amps use with these.

jeanna

[nievesoliveras]

Hello lady @jeanna!

I was browsing and  found his new topic and made a composition of his new posted circuits.

Jesus

[Flux4Energizer]

Hello guys,

I've been keeping track of this topic for a long time now.
Seen a lot of good circuits which i replicated, but today i was bored and i decided to build a PIC programmer.
(http://www.youtube.com/watch?v=fWV5vnOxphg)

After this i thought lets try to make a JT which is controlled by a microprocessor with a feedback to source.
I've been try-ing to make a good JT with F2S so i don't have to swap batteries all of the time.
Now with the PIC controlled JT the Feedback is quit easy.

This is what i came up with: http://www.youtube.com/watch?v=gaTkm2YOW3w

This is just a very rough design and a work in progress.
The next step will be to let the batteries which run the microprocessor also run multiple JT circuits controlled by 1 PIC and feeding the energy which is held in the capacitor of every circuit feed back to each battery.
So in this case i will get at least 4 JT circuits.

All ideas are welcome.

Regards,

Flux 4 Energizer

[teslaalset]

Hello guys,

I've been keeping track of this topic for a long time now.
Seen a lot of good circuits which i replicated, but today i was bored and i decided to build a PIC programmer.
(http://www.youtube.com/watch?v=fWV5vnOxphg)

After this i thought lets try to make a JT which is controlled by a microprocessor with a feedback to source.
I've been try-ing to make a good JT with F2S so i don't have to swap batteries all of the time.
Now with the PIC controlled JT the Feedback is quit easy.

This is what i came up with: http://www.youtube.com/watch?v=gaTkm2YOW3w

This is just a very rough design and a work in progress.
The next step will be to let the batteries which run the microprocessor also run multiple JT circuits controlled by 1 PIC and feeding the energy which is held in the capacitor of every circuit feed back to each battery.
So in this case i will get at least 4 JT circuits.

All ideas are welcome.

Regards,

Flux 4 Energizer

Flux, interesting approach.
Can you post a diagram of the feedback circuit you used ?
Thanks!

[nievesoliveras]

@flux4energizer

What you did is what I am studying now. I mean the part of using a pic programmer.

The feedback to the source is not correct. You are charging a battery that is not the source.  Pay attention that the source are the 4 AA batteries.
Nice job!

Please post a schematic if it is not too much to ask.

Jesus