Joule Thief

[dasimpson]

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 ....

do you connect the cfl to the negitive battery terminal and the second from the top flash terminal ?

[templer]

do you connect the cfl to the negitive battery terminal and the second from the top flash terminal ?

@dasimspon,

i couldn´t wait untill tomorrow. i shorted out as you told and connected a 4watt/6 inch philips fluorescent tube and it worked. measured 99-100 volt ac at the tube ends. i connected it differently, also as gadget recommended and it worked his and yours  way. found also a 3rd and 4th way of connection. it works also with just one wire connected to one end of the tube, but very weak. i will try to make the pics from both sides as you said tomorrow and will also post here how i connected it. now i go to bed, in my time zone it is 45 min past midnight.
tnx very much for your help, see you tomorrow
jerry

[dasimpson]

@dasimspon,

i couldn´t wait untill tomorrow. i shorted out as you told and connected a 4watt/6 inch philips fluorescent tube and it worked. measured 99-100 volt ac at the tube ends. i connected it differently, also as gadget recommended and it worked his and yours  way. found also a 3rd and 4th way of connection. it works also with just one wire connected to one end of the tube, but very weak. i will try to make the pics from both sides as you said tomorrow and will also post here how i connected it. now i go to bed, in my time zone it is 45 min past midnight.
tnx very much for your help, see you tomorrow
jerry

no prob m8 i wasent sure if it would work from both flash termianls cos one of them leads back to the base of the transister you see

[templer]

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 ....

i will try this tomorrow. glad that you also answered. so i get a wide overview what can be done. please see also my post #14564 for dasimpson. i wonder how it can be seen from outside if it is a camera with aa or aaa.

can you please point right to this pdf for the aa circuit.

best
jerry

[dasimpson]

i will try this tomorrow. glad that you also answered. so i get a wide overview what can be done. please see also my post #14564 for dasimpson. i wonder how it can be seen from outside if it is a camera with aa or aaa.

can you please point right to this pdf for the aa circuit.

best
jerry

i worked out why you can use the flash terminals diode 2 must allow the charge to the emitter and - of the battery