Joule Thief

[Thaelin]

   Now just take the circuit and power it with a  D cell and have lights for a long time.
This is what I have been waiting to see. A FL bright enough to see by from a single
battery. A trip to the As-is for some junk cameras. 

thaelin

[xee2]

@ @ gadgetmall

I fixed the last drawing. Hopefully it is now correct.

[gadgetmall]

@ gadgetmall

OK. Like this?

i think so . My Head is not thinking clear but it look right . one leg go  to base other to coil which is parallel to the circuit like that the cap jumps from base connection across the transformer which is the other end of the VR Yes .. I have to get something to eat for me and my little one . all have fun and i'll see ya in a bit if you need me .. I think i put the pictures so anyone can do this quick . did i mention u can use a 3 k hard resistor . Just get that Power nabbing resistor outa there !! also . that is my 3rd test Fugi with a hard 3 k resistor . I havent did a test on it but got the current down to 32 or so. Im outa little pots . I haven't finished it . still messing with caps and trigger traces .s

[xee2]

@ jeanna

It was late at night and my thinking was not very good. I tried lighting an LED with the 10K circuit and it did not light. The output voltage was still good and I jumped to the conclusion that the circuit was not putting out any current and therefoe told you that it was a bad idea. However, it turned out that it was the LED that was bad. When I tried a new LED it lit up very bright. So the circuit was working but not my brain.

[gadgetmall]

Hi everyone,

I think I have been in deep space or something.

@gadgetmail, Have all these discussions about the PNP and 68pF caps and other caps been about the fuji circuit?

No wonder I couldn't copy it. I was using a simple wound toroid and a 3904NPN to which I added a 100pF cap at the base...

Please clarify. My head is spinning with all the new ideas and posts today.

@xee2, When you said bad idea etc... what was the bad idea, please?

@All,
I got my order of toroids, and also a thing 3/$1 that goldmine called high voltage board which is a stripped camera ckt which seems to have a big transformer. It also has a neon light and some other things we use. no cap no xenon bulb, no battery. I kept quite until I saw the transformer. It has 5 pins soldered. but it is the big one, I am pretty sure.

I want to get to work on something right away... mmm I wonder which way to travel today 

@Jim, I saw the one with the mousetrap, but I haven't found the first one yet... (I went looking then got distracted, I think)

thank you all for such a great thread,

jeanna

No Jenna they are different . I just tried the Jt  LPJT  mod on the fugi last night and it works on it too!! . Sorry . I know i am going at light Speed but these jokers that pop in here saying we haven t accomplished nothing got me ticked and so i have three projects iam working on and SHOWED THEM !!. you keep working on what you got . Ok ?
Al