Joule Thief

[xee2]

@ jadaro2600

I was wondering if anyone had any ideas?

I think maybe you just did not keep the switch closed long enough. It will take a while for the capacitor to charge up. Try keeping the switch closed for about 5 minutes and see if the circuit will work when it is opened.

[gadgetmall]

@xee2
      to Light a unmodified Cfl . is very hard to do . I have tried it and its like a Short Circuit on My Fugi mod . . I am Not using a diode or cap so the Cfl is getting pulsed . I have tried an unmodified fugi on a unmodified cfl and get a big spark and a flash of light but thats it .
I also want to know how the extra winding is on there . i don't see any room to squeeze wire threw there . Is it on the Outside  of the laminations ? Also the Cfl had a Bridge on it and it will of course convert the ac to dc but how is it running off dc in the first place ?

[jadaro2600]

@jadaro2600

Tell me did you check your copper toroid , it is made of mag wire isn't it ?

If yes tell me dose your core put out voltage?

Mark

The core is torroid shaped, 30 gage wire on the inside and 26 gage wire on the outside.  Current paths flow opposite one another - otherwise the device doesn't work properly.  So, my particular design is direction dependent.

It's hard to measure the voltage, I'll try some thing in a minute and post my results - the core is different now, so I'll also post a new image of the setup.  *edited to add picture.

Where to measure voltage?  Also, the resistance in this image is 30k,, and the frequency across the base collector path is 1.6khz

[innovation_station]

just thought i would mention i just got my voltage to 28vdc from micro mk2 x 1 coil ... out put .... could easly dubble it up ...



it seams each turn adds 2v so maybe i have too many jt windings....



ist


nice coil


jadaro2600

[Mk1]

@jadaro2600

I mean the 30 gauge core since its a coil it self could generate voltage , but i see you did not keep the ends out.