Joule Thief

[jeanna]

WILL YA LOOK AT THE PRESENTATION!!

I very carefully took the camera apart. I was hoping to save the switch because it is such a nice piece of copper sized and placed just right for keeping the light on.

I removed the cap.

I cut the + side of the diode and the whole thing crumbled, so I decided I had better remove it all and solder the red lead right to the board at the place/trace of the - side where it connects to the transformer. I did that from the green side which faces the front of the camera.

I soldered the black lead to the negative side of the battery holder right across the whole square of it.

Then I fed the red wire through the eyepiece. (the shutter is closer, but the wire pinched.)

Then I snapped the camera back in place. It didn't want to stay tightly closed under pressure from the on switch so I used the broccoli band. (fat stiff and tight) And it holds against the switch pressure. have a look.

jeanna

[WilbyInebriated]

WILL YA LOOK AT THE PRESENTATION!!

I very carefully took the camera apart. I was hoping to save the switch because it is such a nice piece of copper sized and placed just right for keeping the light on.

I removed the cap.

I cut the + side of the diode and the whole thing crumbled, so I decided I had better remove it all and solder the red lead right to the board at the place/trace of the - side where it connects to the transformer. I did that from the green side which faces the front of the camera.

I soldered the black lead to the negative side of the battery holder right across the whole square of it.

Then I fed the red wire through the eyepiece. (the shutter is closer, but the wire pinched.)

Then I snapped the camera back in place. It didn't want to stay tightly closed under pressure from the on switch so I used the broccoli band. (fat stiff and tight) And it holds against the switch pressure. have a look.

jeanna

nice job jeanna!
you should put that up on instructables.com

[jeanna]

thanks, yup thats it. sometimes it just lit as soon as i put the battery in, sometimes i had to push the button.

That is interesting. How long does the light hold after you push the switch?
It could be a kind of timed light. You know, light goes on so you can find your way to the end of the hall then turns itself out.

Cool.

jeanna

[WilbyInebriated]

That is interesting. How long does the light hold after you push the switch?
It could be a kind of timed light. You know, light goes on so you can find your way to the end of the hall then turns itself out.

Cool.

jeanna

it stays on after the switch is pushed.

[Mk1]

To all
Last nigh i made some experiment with some of the part laying around , so i used a trashed radio power transformer main 70 ohm
and 3 secondary one 1.2 ohm ,2.6 and about 12.8 . I made a Joule thief (1.5v circuit )using a 2n3055 and a 1 k resistor using the lowest secondary as prime in jt and second lowest for secondary.Then i took the main (the one originally used to connect to wall socket) hooked it up to a bridge rectifier and it gave me 80 volts dc and charged a 470 uf 200v quickly up to 120 volt i scared there got quite a spark, it easily lights a neon tagged at 120vdc.I don't have a camera except a fuji lol i should have used it before destroying it, i wish a could show you.

Also really all of you need to build the joule thief it really great. All of you that did here are some of the results of my experiment i added more wires around the the toroid and found that they where also giving real useful voltage doesn't show on meter if not rectified but will work led easily.Tesla pat 381970 could be experiment on toroid ferrite is mostly iron i have experimented winding one and got over 60 volts output from a 1.5 cell. Be careful a led may work even if not properly wired jt led. Led may not light at 1.5 volt dc but ac will do. Most of the jt i have built do not use the regular led wiring i use additional coil to pickup radiant energy from the core and gives me more to work with but you sill connect led the same way.

single strand wire are best they hold in place tight , pnp and npn transistor don't work the same.