Joule Thief

[templer]

that is exellent

this is hard to follow because if you look at it like a standerd joule thief with a pick up coil it works nothing like it need to find out the pin outs for that transistor i serched the net for the code you gave and no results

i searched for the transistor datasheet in the morning without success. now i remembered the transistor-testing-gadget i have. here are the tested transistor datas according to the attached pic:

1st leg: base
2nd leg: collector
3rd leg: emitter
hfE = 685
Uf = 746 m
NPN-transitor

base is connected to R2.

best
jerry

[dasimpson]

i searched for the transistor datasheet in the morning without success. now i remembered the transistor-testing-gadget i have. here are the tested transistor datas according to the attached pic:

1st leg: base
2nd leg: collector
3rd leg: emitter
hfE = 685
Uf = 746 m
NPN-transitor

base is connected to R2.

best
jerry

from what i have got so far here is what needs doing
also if i am right that 15k becomes 15100homs

[templer]

from what i have got so far here is what needs doing
also if i am right that 15k becomes 15100homs

@dasimpson

tnx very much. i will try it tomorrow. this night i will try to make a drawing of circuit lines on the board. tomorrow i will post the drawing here and let you know the practical results.

best
jerry

[dasimpson]

@dasimpson

tnx very much. i will try it tomorrow. this night i will try to make a drawing of circuit lines on the board. tomorrow i will post the drawing here and let you know the practical results.

best
jerry

the one with the rear lighting is ideal can see them very easy.
if you could could you make an image of the front and one of the back but exactly the same
my gf uses photoshop and said she could make it so we can see the parts and the traces at the same time

[gadgetmall]

step 1: remove the 350 volt cap (already done)
step 2: short out D1 (diode 1) with a jumper
step 3: short out the " copper stripe button"; this can be well seen in your picture "aaafugimodded"
step 4: i don´t understand clearly; i will remove R2 100 ohm and replace it with a 5 kohm poti. the two outer legs of the poti i will solder instead R2 but where i do solder the third leg of the poti

Solder a 5 k pot inplace of r2 using middle leg and one outer leg so you can adjust the bias .

question: on picture “AAAmodtop” it looks as the upper leg of R3 15 ohm is soldered to the lower thin copper stripe and the lower copper stripe is connected with the upper copper stripe. is this correct?
The copper sprip is a switch . just solder it closed .
The two long pieces of copper sticking out to the sides are not used . just cut the off . I remoced the cap ,flash lamp and trigger transformer ,not needed in this setup .
My aa mod is different and that is why i have a PDf a few pages back for them . It will run a cfl 16-24 hours on a rechargable AA.
Gadget ....