Joule Thief

[Mk1]

@mdmiller

Good work!, ok the coil in series seems out of Phase try truning one of the coil around(flip the connection).
Iron has a conductivity at about 18 % of the copper, And about 8 times the resistance.
Aluminium had 2 time the conductivity of copper per weight.So we know now the a iron wire will work at really low voltage but don't seems efficient in pulsing.(You could replace the iron)

The 26 turns pickup coil are 13 up and 13 down?

My test are made with 2n3904 and 1 k resistance , test battery1.45 volts.

I don't think a 9 volt can destroy anything except leds.Usually the circuit is giving less output at higher volts.

Also on the jt try changing one of the coils direction.

This is all great data thanks again.

Mark

Edit also the switching freq is really important of higher results.

Neon I use for tests

[jeanna]

Hi everybody,

Last night before sleep I put the 30 led array on again to continue to watch it with the same battery it had used with the same toroid and 20 turns. I did not recharge the battery. It was a little refreshed, though, and the lights were bright.

This morning they were out.
The battery said 1.00V

I detached the secondary from the array and returned a single led to the joule thief configuration. It lit again.- That was as a plain joule thief.- but not for long.

So, just to see if I could see what is going on, I hooked up the bridge rectifier to the meter. Then I held the ends of the 2ary to the inner pins. The light went on briefly, the voltage said 2.35Vdc. Then the voltage went down, hit zero then the light went on again, and the voltage returned to 2.35V... This cycle repeated itself over and over.

OK next, I was taking it off and the light went on again.

So, I just held the 2ary ends one in each hand. The light went on and off with perfect drum-like timing.

My take on this is that I provided a tiny bit of voltage on the secondary, and that fed in a reverse way back into the joule which then did a timed on-off thing.

Isn't that interesting?

BTW this is NOT the one like mark's. This is the same toroid I used before with this array.

More to do,

jeanna

[Mk1]

@all

Look what i just found!

http://www.free-energy-info.co.uk/

http://www.free-energy-info.co.uk/Chapter3.pdf

http://www.free-energy-info.co.uk/Chapter5.pdf

[mdmiller]

,,,ok the coil in series seems out of Phase try truning one of the coil around(flip the connection).

Flipped connection on one pickup coil, only 0.6V now

The 26 turns pickup coil are 13 up and 13 down?

I took the wire, measured to the middle, and put a turn around the toroid at the middle and then I alternated a turn on from each side, it should be the same, in effect it's 13 up and 13 back.  Now, each turn on the way back down is inbetween each turn on the way up.   Possibly this is the issue.

Also on the jt try changing one of the coils direction.

Oddly when I did this, and each time power is applied with an led in the circuit, it flashes once and quickly goes out. --  appreciate all of your help - Duane

[Mk1]

@mdmiller

The 26 turns are ok, the switching freq i can't say(it may be the problem)try playing with resistance at the base.But you have made some discoveries on iron that are valuable, If you get a set voltage on one side and its not the same on the other there is something wrong,the best way to use the power would be one bridge per coil . But i think , it maybe time to go back to all copper 7 turns , for higher voltage experiment.


Thanks again great work!

Mark

Edit: i will try those same wire and i will test it.