Joule Thief

[xee2]

@ free

Your board looks different from the ones I was using so I can not give detailed help. But, you should be able to connect neon to where the large cap was connected and then just find out how to jumper the power switch that turns the camera on. Good luck.

[stprue]

@ jeanna

Why don't you try to EXACTLY duplicate a circuit that was shown to work. You always seem to want to try something different instead of doing what is known to work. I think you have all of the parts that hazens1 used except maybe the TIP31, but a 2N3055 will work as a substitute. And someone said the TIP31 was available at RS.

I agree and I am using the Hazens design with a 2N3055 and I think it works better then the TIP31.  You can do it Jeanna!

[jeanna]

Hi free,
Welcome,

I think you might fry your led in that spot.
There is probably enough voltage there to light 50 to 100 leds in series.

When I was playing with the fuji I used that spot to light a fluoro tube.
I also lit a string of leds and a second tube all at once.
I believe it was from that connection also.
That is a very powerful place on the fuji board.

have fun,

jeanna

[jeanna]

I agree and I am using the Hazens design with a 2N3055 and I think it works better then the TIP31.  You can do it Jeanna!

Welcome back, stprue,

As you will see in a few pages, I did! I used the MK1 design. And to note the advice from xee2, When you make a copy instead of going up 60 turns etc, go up 85 turns. That should give you the extra voltage to make it easier than mine.

Note the turns I used. It took 13 turns on the base coil and 3 turns on the collector coil. This is opposite the way I was connecting the primary, but it is really much better.

I may make one as a MK2 instead of the longer 85. It will probably take just as much room on the toroid as the 85 turns up...does. I am still thinking about it.

The newbie wire spools drop right through the center. I used red 24 gauge newbie wire for my "biggo". (a reminder-- that is not the radio shack 30 gauge wire, it is 24 gauge)

It really sings a loud tune too.

welcome back.

jeanna

[jeanna]

it... so it can run a 40watt Tube.

can some1 point me in the right direction 4 this circuit hes using..many thnx 4 this

It is a lot to read, but the first 135 pages of this thread have all the variations.

But, Pirate (Bill) is making a whole thread that only has the directions and diagrams for doing these special things.
It should be there.

http://www.overunity.com/index.php?topic=6942.0

jeanna