Joule Thief

[Djoko]

Don't be disappointed with the deem light with this setup.  Just disconnect the led with the emitter leg of the transistor and then jam this open leg with the open wire of the base coil.  The led would be super bright.  Even brighter than with any of the jt I have!  However the battery drain is about 30% higher than the jt, measured at about 120 mA.  With some tuning, it could be reduced to around 70mA.

Hi bs2012,
The JT Jamed Circuit looks like LaserSaber's Super Joule Ringer 3.0. Am I Correct?

Cheer
Djoko

[bs2012]

Hi bs2012,
The JT Jamed Circuit looks like LaserSaber's Super Joule Ringer 3.0. Am I Correct?

Cheer
Djoko

Just compared and seems it is.

Actual I would like to attempt to jam the led leg back to the battery and charge it.  Certainly it is failing at the moment but I accidentally found that led is super bright if connected to the base coil.

Still experimenting how to tune jt and self charging jt.

[TinselKoala]

Timed rundowns from known voltage levels provide a good measure of total input energy and average power dissipation over the timed intervals.

http://www.youtube.com/watch?v=e5G0PyJsoyo

I get the start energy at 1.500 V as 3.375 J and after 290 seconds at 0.750 V it's down to 0.844 J, for a total input energy of 2.531 Joules over the 290 second period, for an average power of 2.531 J PER 290 seconds == about 8.73 milliWatts average input power.

[Lakes]

Good stuff Tk.

Anyone want to try one of those LED "shaker torch" things with this?
http://www.amazon.co.uk/Rolson-Tools-60753-Shaky-Flashlight/dp/B000WDTIEO/ref=sr_1_1?ie=UTF8&qid=1354964803&sr=8-1

[gadgetmall]

Just compared and seems it is.

Actual I would like to attempt to jam the led leg back to the battery and charge it.  Certainly it is failing at the moment but I accidentally found that led is super bright if connected to the base coil.

Still experimenting how to tune jt and self charging jt.

Hi .. That is very similar to My circuit posted several pages back . i use the base emitter to obtain a 1/2 ua current draw for a what led . That circuit will blow white leds with a charged 1.2 battery thus the need for a high resistance pot  ..