Joule Thief

[innovation_station]

here is a pic of the unit im building ...

ist!

[jadaro2600]

Hey 5.6 ma is very good your are getting there  !. If you have the parts try a Tank on the base in series with your resistor . It will go into resonance and you will see the current drop way down and the led get brighter .
Al

By tank, I assume you mean a tank circuit?  SO just bridge the resistor with a capacitor?

which i just tried, it seems to increase current usage - but my resistor is in front of my transformer relative to the transistor, you're is behind it.

[gadgetmall]

@all  .
Just wanted to show ya a 50 cent 20 blue led Christmas Toy light string  . It supposed to run off three batterys  but you know what i did I used a Tiny ferrite bead . I found something that had hundreds in them 11turn Bifial primary and a jeanna 5 turn secondary is enuff to light them up Bright ! and with a tank on it current draw is small 1 ma !!!!! Turn Inefficient Junk Into a very eco friendly System !!
Also the Fugi Production Line ready for kits !!!!!!! Thanks  to a Good Friend who i met here on the forum and lives not to far  for me and sent these . God Bless You !


Gadget

[xenomorphlabs]

@IST: Remarkably complex setup. I wonder what it will achieve!

So you are using MK2, as i understand it has 2 primary and 2 secondary coils on 1 toroid.
Do you use both primaries and feed them from different circuits? I am trying to grasp the necessity
of having 4 coils on there, i am sure it is for a good reason. Would be nice if you could explain that.
Are that 1N60s on your rectifying board?

[gadgetmall]

By tank, I assume you mean a tank circuit?  SO just bridge the resistor with a capacitor?

which i just tried, it seems to increase current usage - but my resistor is in front of my transformer relative to the transistor, you're is behind it.

Yes the 68pf cap is what i use . any other seems to increase current.  A tank is a resonate circuit .a cap across the resistive part of a tiny pot is a tank circuit .Just use one end and the wiper to adjust the circuit . again it works a a number of primary's that are untuned . 
Gadget