Joule Thief

[crowclaw]

@freepow

It depends on how simple or complicated you want to combine the three caps! if you want to manually switch them you could use three toggle switches and link the toggles together to give one operation (off_on)...  yes,, you could use thyristors, but the caps must be discharged for them to turn off. Two double pole relays could also be used but you will need a voltage supply for them of course. There are other methods already shown here, all depends on choice.   

[dasimpson]

ok here are some led lighting i have done these are old garden lights taken apart internals used adderd led longer wires etc but they are all jt just a little more hightech then how we make them

with the dark pics i was hopeing to show how well lit the room is but dident work the ring light only runs off 1 light units could be made to work on 4 but 2 is god for a night light for the kids to see grand kids vist weekends you see

the light is there but not used the landing one is gone completly if it was just me in the house this would be my only lighting works well to see around any real lighting needed aka reading or computer i would have led lamps with the led's in a more focused beam

oh and the last to imiges are the unit from inside the garden light dark circuit with jt as they only use a 1.2 volt bater

[kooler]

just a update to my old stuff..

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

just thought i might give a update before i move to a different design or device..

robbie

[freepow]

  Thanks everybody great help!

     another Question... I desoldered a flash camera transformer and am using it as a JT, I am getting
     around 260+ volts output through a 1N4007 diode, however when I try to charge a flash cap...
     It only charges up like this  .....25......30..........35.............40...............45.....................50 volts
     seems to take ages, yet I am using the disposable camera transformer, the same type that when in
     the camera... it charges to 300 volts within few seconds.

     What am I doing wrong
     
     I should be able to charge a cap just as fast !
     
     ?

[Pirate88179]

I am not sure but, if I understand your set-up correctly,  if you are using a diode between the transformer output from the secondary and the cap, you are only getting half the available output.  This is the same reason I cut the diode on all of my Fuji circuits.

If I did not understand and this is not the case then I am sorry.

Bill