Joule Thief

[xee2]

@ jadaro2600

Wouldn't it be more wise to use a JFET with this circuit?

I've appended an image of the most current version of my circuit ..it's the resistor less version - inductive only.  I was thinking that a FET might be better than a BJT.

Fets had more on resistance than transistors and were less able to handle large currents. That may no longer be the case. However, I would think that theoretically your resistorless circuit is more efficient than one with a resistor since the caps do not consume power.

[innovation_station]

i found fets .. mosfets irf 840 to blow up easly if a high spike is returned and it is unprotected plus you will need to change the curcuit to accomadate fets...

in my opinion ...

this is where the IST SHIFT COIL FITS...    and you dont tap the fet you tap the junction of the 2 coils diode and cap ..

agin there is A MILLION WAYS TO DO IT .. 

but for the BEST WAY THERE IS 1 .. 

lol

ist!

btw that 12v gel cell as i call it .. is still chargeing  from the SAME AA  im up to 10.45

so its slowing down ... but not too much it is still chargeing ...  my cap reads 264.0vdc

i bet its a DEEP  charge in the battery 

[jeanna]

Hi everybody,
I have been to the movies today, er well making them.
I made 6 very very small quicktime movies of my 2 tier joule thief turning on the secondary of a NS generator. In fact 3 of them.
Yesterday I made the unedited spontaneous movie moments after I discovered it.
Today, In a very unedited style again I checked the Radiant Generator and its waves and volts and compared the one from yesterday with 2 others.
So, this shows me that it is very possible to make the same device that Tariel Kapandse made, but without sparks of any kind... yet.
millivolts is too small to declare that, but I am certain there is a way to make this voltage higher.

It all started with a joule thief.
tor-23 from allelectronics,
245ohm base resistor
11T,11T,74T,21T = 2 secondaries
4 extra inductors 220uH each.
Battery getting low 1.2v or lower
1 of 3 stubblefield generators acting like some kind of resonant receivers.

Have a look.


***Bad Link removed by Moderator as requested***

jeanna
EDIT
There may be a problem.
Is anybody able to see something from these?
I will make another set, but they are too large. Only one is under 300k. darn! bbs.

[jeanna]

...

I've appended an image of the most current version of my circuit ..it's the resistor less version - inductive only.

Hi jadaro,

Does one of those ways seem to perform better that the other?
I am starting to be intrigued by this idea.

Also, does the cap across the C-E need to be there too?

thank you,

jeanna

[jadaro2600]

Hi jadaro,

Does one of those ways seem to perform better that the other?
I am starting to be intrigued by this idea.

Also, does the cap across the C-E need to be there too?

thank you,

jeanna

The one on the bottom performs better.  The blue and orange components are optional.  Only the black paths and components are required.

Also, the inductance needs to be sufficient to cause the cap to fill, and the capacitor needs to be fully discharged in order for the oscillations to begin.

I was considering a FET because it works on voltage ...however, this design I have is resistorless, and there is virtually no current flowing through the base, only what is required to turn it on.