Joule Thief

[dasimpson]

@dasimpson

i am not used to handle a forum. therefore i am a bit slow ;-), sorry for that. the board in the mentioned post looks really as my aaa fuji board and the resistor values are the same. here is my interpretation of these pictures :

+ 350 volt cap is removed
+ the negative end of diode 1 is loosened and goes to a capacitor, but which capacitor? or goes it to one end of the cfl?
+ then a wire goes from the lower end of R1 4,7 mohm to the other end of the cfl. is this correct?

where is the difference to the modification of gadget?

thanks
jerry

yes remove flash and cap
then a wire needs jumping from pin 3 of the tranformaer to e of the transistor see image below
shourt out the diode 1 connect both wires for the cfl were the large flash cap was


that is what i can make out of 2 or 4 images of that circuit board

[dasimpson]

if some one can get me an image of the front and mack of the circuit bards i can photo shop the back onto the top so the parts and traces can be seen better just wish i could clear the traces up under the black paint

[templer]

yes remove flash and cap
then a wire needs jumping from pin 3 of the tranformaer to e of the transistor see image below
shourt out the diode connect both wires for the cfl were the large flash cap was


that is what i can make out of 2 or 4 images of that circuit board

dasimpson, your are absoultly right. i looked on the pics in post #14409 and you directed me to #14412. i see now where the tube is connected and which pin i have to connect with a jumper. and the two wire on the left side of the picture are the shorted diode connected to R1 4,7mohm.

as i would like to understand, could you tell me where the difference between those modification is?

thanks
jerry

[dasimpson]

dasimpson, your are absoultly right. i looked on the pics in post #14409 and you directed me to #14412. i see now where the tube is connected and which pin i have to connect with a jumper. and the two wire on the left side of the picture are the shorted diode connected to R1 4,7mohm.

as i would like to understand, could you tell me where the difference between those modification is?

thanks
jerry

the shorting of the diode and just cutting it the difference is if short it the connection is made at the cap connections but if you cut it you have to make the connection were you cut the diode

i wish i has some of these units i would clean all the coating off them and do better tutorials on how to do it

[templer]

the shorting of the diode and just cutting it the difference is if short it the connection is made at the cap connections but if you cut it you have to make the connection were you cut the diode

i wish i has some of these units i would clean all the coating off them and do better tutorials on how to do it

does this picture help? you can tell me where i should remove some coating. btw, if you want i send one of these units whereever you want for free.

jerry