Joule Thief need someone to try something .

[bryanwizard]

I tried JT circuit already.. made some demo kit. 3Volts battery powering a 5W cfl bulbs.

I used an EE19 core with air gap in the middle leg to store more energy then release it after a cycle.

[Rodeown]

Pay no attention to my JT videos. My series-parallel bank of 24 white LEDs, running on 1.5 volts from a battery or capacitor, is somewhat less than "full brightness", after all -- and the circuit mods that I have used only increase brightness and run time significantly, they don't make it OU.

Thank you, :-)  I am making a point of NOT watching any of your videos, looks like there is hours of research you have done that i dont need to know about ;-)

[TinselKoala]

Thank you, :-)  I am making a point of NOT watching any of your videos, looks like there is hours of research you have done that i dont need to know about ;-)

And of course.... I feel the same about YOUR videos.... or I would, if I could find any.

[chrisC]

You should take a look at LTseung's work, then. He claims to be able to light up "thousands" of LEDs with his simple JT circuit, which is so OU that he is in mass production already.... it even makes a _negative_ COP !! (I'm not sure if that's better than Rosemary Ainslie's claim of COP Infinity or not...)

....

LTseung is the man to watch.....  universities and private researchers all over the world are receiving his _guaranteed OU_ mass-produced JT test boards at this moment.

Is this the same LTseung who forgets to take his medicine?


cheers
chrisC

[Pirate88179]

Well since i first posted i have tried many configurations of coils on the torroids and got varying results...
here are few of my observations....bear in mind i am just "playing" so am no expert.

I noticed using different rated resisitors helps get better brightness,
I now use a variable resisitor and turn it till i get best brightness then measure the resistance and fit a corresponding led,
the "resistor/base" coil can be very few turns with the positive/collector been as many as the torroid can cope with.


What i really would like to see is a JT that can power 24 white Leds at near full brightness off one 1.5v AA,
If this can be achieved then i believe i can make a self running unit.
If anyone has a circuit diagram that outputs full LED brightness to 24 leds please post in this thread
as whilst i can power 3 to 7 leds at near full brightness when i get above this amount they start getting dimmer.

Check out my videos.  I can light 400 leds on 1.5 volts and,  on my way there, when I did 200,  I would say they were at full brightness.  The 400 were not.  This was done several years ago.

Bill