Joule Thief

[jeanna]

This is just a reminder that you cannot hear any frequency above 20k.
Most of my jtc's are quiet and they work fine.
In fact only the "biggo" which has a frequency of 5.6khz is audible.
The rest are way out of range like 50khz.

So, all I am saying is that NOT hearing it is not an indication that it is not working.

jeanna

[innovation_station]

i picked up some goodies ... 

have a look ...

i got this fiber thing .. too ...

and a few trunk amps and linex's

ist

so the boss just came by .. and it turns out its a fiber node .. i got 

i snaped a pic or 2 of the xm2 power supply..

[stprue]

This is just a reminder that you cannot hear any frequency above 20k.
Most of my jtc's are quiet and they work fine.
In fact only the "biggo" which has a frequency of 5.6khz is audible.
The rest are way out of range like 50khz.

So, all I am saying is that NOT hearing it is not an indication that it is not working.

jeanna

I didn't know that!  I can hear almost all of mine.

[jeanna]

... For the input of the crystal core coil i have make it like a joule thief toroide, one wire from opposite side.

Opposite what? I am not sure what you mean.

I can put leds in the two directions on the output, they will light but are stronger in one side. Looks like i have AC. The stange thing is that if i put a led in the strongest side, i read less milliamp going out from my battery. More leds i connect less mA i read but it don't get to 0mA. When i reach ~36mA and connect more leds, it get more mA.

This sounds normal to me. Mine behave this way too. Some do not, but most do.
Thank you for this report!

It works with a toroide too instead of the crystal core coil but instead of taking a wire from different side for the input, i must take the two wire from the same side.Very strange.

Here is a video: http://www.youtube.com/watch?v=_O9jrp0tHT4

Thanks for the video. It helps a lot.
I am just not sure what you mean by taking wire fromn the same side?? I can almost see it on the video.

Are you putting the crystal inductor in a series way from the pickup that is on the toroid?

thank you,

jeanna

edit add
@stprue

I can hear almost all of mine.

I have been trying to go to high frequency. The smaller toroids want to be higher frequency.
My thesis is that if I can get a high frequency to start with I can lower it to get the voltage I need .
Since the voltage and frequency go in opposite directions in a joule thief, I wanted to have the leeway.
The biggo likes 5.6khz.
I think that is what xee2 gets from his too.
just my thoughts.
j

[stprue]

@ Jeanna

Let me know when you have results on the biggo replication, I would like to compare.