Joule Thief

[dasimpson]

the jt i have at moment has an output of 30volts so i can run 9-10 leds at full brightness if i try and run the same amount of leds in parallel the brightness drops i havent dont a longivity test with more then one led i may try with 9 in series ad see how that works

[dasimpson]

i use wide angle led also they have like a hole drilled in the top here is an image they can put out quite a bit of light
sorry for bad qality not much light and i was using my phone

[NickZ]

   @ All:
    Here are some pictures of the Jt circuits that I'm working on now.  The last ones are of my captret lighting 12 leds, the small Jt is solar powered.
                                        NickZ

[dasimpson]

lol i have the exact same yellow and white toriods dident have much luck with them tho maybe it is because i am using cat5 cable

[NickZ]

   The yellow ones are not the best toroids out there, but the price was right, (free). They are fine for getting to know a little about toroids, and what they can do, without spending anything on ferrites.
   I think it can be done with big air cores, without the cost of buying big expensive 6 inch or bigger ferrite coils.
   I'm going to wind a big bifilar air coil on a clear 2 inch hose, and connect the ends with a dowel to form a circle. Wind a bunch on turns on it, and see what it does.
  Looks to me that for a given voltage on the Jt, the bigger the bifilar coil, the greater the output.  Anyways, a big air coil with a thousand turns of 30 gauge magnet wire should work.  Why not?   I'm aiming for the Jt-TPU,  but , would like to see some current too, not just flufffffff.
                                                        NZ