Joule Thief

[xee2]

@ Neptune01

Any ideas?

I think that using a lower value resistor was a good suggestion. Your diagram still has the LED diode connections reversed. And most of the rest of the circuit is wrong. Please check some of the references given to see how it should be wired.

[xee2]

@ Neptune01

Your coils should be wired as in following (ignore extra coil and tube) and in your case both coils have same number of turns.

[Neptune01]

Gotcha!!
Good news is that I got my first JT working!
I had a look at this image and decided to reverse the wires connecting o the battery and to swap the LED.

Thanks to ALL!

[jeanna]

BRAVO Neptune1 !

Enjoy your new joule thief.
If you want to take the next step, make one using only a secondary as I described yesterday. Then you will have two gems.
1 one, for draining the old duracells
2- one, for use making leds light up with unbelievably little amounts of energy.

Either way, congratulations.

jeanna

[jadaro2600]

Wouldn't it be more wise to use a JFET with this circuit?

I've appended an image of the most current version of my circuit ..it's the resistor less version - inductive only.  I was thinking that a FET might be better than a BJT.