Joule Thief

[Mk1]

@Bob Smith

The main difference in the geometry , the jt and the meg are dual coil pulse device(one on, one off), tpu  has a 3 coil design creating a 3d effect if you will on the current but having 3 pulse tuning.

And yes i believe they are using that same dc pulse , making use a happy bunch.

Edit i forgot bedini it uses only one coil pulse and one pickup coil.


Mark

I used to work for satellite company as a tech help, so sorry i tend to give to much information.
To pickup all at once.But it may be helpful later on.

[amigo]

Gosh darn, this thread moves so fast, I can only read the forums at night and in 24 hours there's 6 pages of posts with more findings and more results. Dare I say this is the fastest moving thread on the site?

Well done everyone!

@Mk1

I feel you might have misunderstood what I was aiming at. The information I posted was to help everyone get broader education on the subject at hand - the LEDs. I personally believe that we should not be repeating mistakes others before us have done. That's why they made mistakes, so we don't have to...

Those eBooks should be considered a reference guide on using LEDs based on their characteristics. Someone already figured that part out, we just now need to implement their findings in our situation.

I know it's "boring theory" and I am the first one to complain about it (I'm a hands-on person too), but after so many years of trying to make a hole in the wall with my head, I realize that we should instead rely on *some* initial theoretical part when performing experimentation (ie. use the door instead).

@electricme

Thanks for finding those links, they got buried in the mass of posts. Not to worry though, all these posts I hope will remain here for posterity so those who come later can get a whole picture of what exactly we were trying to achieve here (and the pains we had to through to get there)

[jeanna]

@mk1

Oh well, I already changed something, but breadboards are nice for that.

Here is the surprise.

Just to redraw this in everyone's heads,

I have  one group of leds being run by the first secondary. It has 15 leds and it is arranged in 5 groups of 3 leds in parallel connected in series . This is next to and in series to another group arranged the same way, 3 in parallel which is connected in series to 3 more in parallel and so on. In series on the board, but being powered separately by a separate secondary winding.

Group 1 is just like last nights array of 15 leds and 11 turns of its secondary but it is all white.

Group 2 is the same but only has 9 leds and 10 turns of its secondary.

Lat night I read 7.5 volts across the whole array. I did this and stopped. I was tired. Today I was not seeing this much higher voltage. The only real difference was the colored ones.

I just replaced the last 3 parallel whites with 3 amber leds, and the first 3 parallel white leds with 3 reds.

I read 7.57 volts across the double array. They still take turns going on and off but I can see it is ultra dim not off.

MK1, I have been checking the polarity on the first array that way when I started. I can check the second array. I think I did before I twisted the wire on, but I will try again.

jeanna

[Mk1]

@all

I almost forgot the french cousin the mace of Michel Meyer .

http://jnaudin.free.fr/html/mmcgen.htm

The ferrite toroid is a good replacement for the ferrite rod and the holder can be eliminated.

[Mk1]

@jeanna

The reason i was asking is that i believe the second coil is not connected properly you send back stuff maybe again reversing leds or wire its the same thing it might work.