Joule Thief

[innovation_station]

i built this unit  but on my scope i can only mesure 165v peek to peek   

2 10 80 but ...  i think it is because  i only had a 1 " ring ...   but it does light a 120v 7w night light led  designed to run from mains ...

i did not use any diodes ..  running with 300 ohm base resistance ..   so im sure if i tune in the resistance my voltage will climb and draw will drop ...

but dont think it will give me the 450 i need .. for a cfl   so i will build another the same but 160 turns

see what that does .. 

got the dual jt wound ...

ist!

plus what if you tap the colpase from the jt coils ... and feed it into the secondary ...   this i have not tryed ..  but it seams to me the colpase will be additive from the rotation  like put a diode on the transistor where the led would go on a normal jt and connect it to the collector or secondary or out put coil ...  what ever you all want to call it ...

i may try this after the next coil  and it will be a sloppy one ... lol 80 turns on a 1" neat and tidy was a pain in the  a$$ lol

[resonanceman]

I  have a question

Is  the first schematic the right way to  do  a tank ? 


The  second  schematic is  the way I  have been  doing it


I am working on another  drawing   ......  showing another way

gary

[jeanna]

@ jeanna


The only tests I did on the 3.38" toroid were the low voltage tests and the tube was only lit for a few minutes at a time while I was taking the data.

What was making the battery run down in between tests?

Have you duplicated the 2B-10C-80P 3.38" toroid? It would take you less than an hour. You do not even have to count the pickup coil turns. The pickup coil is 17 feet of wire total with one foot at each end for leads. That will give you close to 80 turns. I thought that you had done this but now I am not sure.

Not yet, and here is why not.

I wanted you to prove to me that your 2T,10T,80T bigboy would do what Theory said it could.
As far as I can tell, you still have not done that.
If you had just put a freshly recharged NiMH AA into the circuit and run the thing until the light went out and told me the amount of time, my question would be answered.


It seems every time I make something my results are less strong or less long than others say theirs are.
But when I push it, many times it turns out that I am the only one who actually did the whole test.

It was for this reason I wanted someone else to do the whole thing and report all the results the way I do. Then we wouldn't be talking about how I can improve my results, but I could compare them for myself, and then I could see how it went.

Now, you made a comment last week that was... you had never seen a case where someone made an exact copy of a circuit and it did not behave the same way. So, I ask a lot of questions.
My exact copies are not always exact.

I may be the only one here who has run a battery down while using a joule thief secondary to light a fluoro tube.
I am still the only one who has done that with the fuji circuit. So, all the theory does is get you started.
The proof of the pudding is in the eating, as my grandmother would say.


thank you,

jeanna

[xee2]

@ resonanceman

I  have a question

Is  the first schematic the right way to  do  a tank ? 


The  second  schematic is  the way I  have been  doing it


I am working on another  drawing   ......  showing another way

gary

People have done both. I have always used the approach in your second circuit.

[xee2]

@ ist

i built this unit  but on my scope i can only mesure 165v peek to peek   

I posted the circuit because all parts for it are available by mail and it is easy to make. I had no idea how it would work with other toroids. But, from your report it seems to not work as well with small toroids. Thanks for sharing your results.