your circuit

if you need help making ''your circuit'' better..
look here first..
BWJT

oh by the way at 3volts and up it gives off rf..
at 9 volts with a aircore it gave me a very bad headache with a very noticable mood change..
so beware..

robbie

Can you post the consumption with 3V source to fully lit LED?


Is there benefit of using it backward?

Interesting info with headache. I don't do joule thief anymore also because of that reason. Interestingly, Jeanna get opposite result with her Joule Thief.

Hey thank you for the circuit! Are L1 and L2 air core or on rods?

-Altrez

Jt Rf

I think every high freq circuit emit RF.

mikrovolt
when i first made it i used it for triggering small fets with a double A battery..
if you want you can get sine wave- spikes- ramped out were you are tapping..
but with a small inductor on the battery side then its a led driver.. lol
but you are right.. the freq is pretty sable as the volts drop..the reason i called it the backwards jt is cause it works best with a bifilar coil and one transistor.. and with one tweak to your circuit you can run a battery down to 0.1 volts.. using a 2n3055
i wasn't flaming you at all.. sorry

i won't post here in this thread no more..
later dude

robbie

Low Saturation Vbe(sat)

RE:
you can run a battery down to 0.1 volts.. using a 2n3055

search words
Low Saturation Vbe(sat) germanium transistors low voltage

Noteworthy: While most of us don't use our batteries down to the very last.
Kooler has found a way and posted a link in the previous post he calls backward joule thief. thankyou

************************************************** **********
I have started over with another oscillator that may be easier to build.
It is a colpitt running at 50Khz, I will take the design to second stage
transistor this is a module that can be modified for wide range of frequencies and can last long time on low voltage. Hopefully to interface a narrow pulse output. I am hopeful that the electromagnetic components will be recycled and remain inside shielding leaving only very very little RF harmonics as a good neighbor policy. much less than a television gives off.

The direction of the project.
I am beginning to think that bifiliar coils and narrow pulse are doing more than conventional textbooks teach. Possibly as an attribute of replicating
the exact wave on the second coil under the right conditions that another form of electricity may be available as a radiant form as some projects are beginning to show.

I will be posting the colpitt here were other can find easily find it.
I will name it shooting star.

Yes, I am very interested in your colpitts circuit, after seeing you mention it
in another thread.

FRC

Simple Colpitts Oscillator

this is the colpitts circuit
The frequency is determined by L1

feel free to comment



This is flat bifiliar coil I am posting it is not part of the circuit above. The flat coil is constructed from the center counterclockwise.



This is a calculator for a single flat coil.

Flat spiral coil design calculator

This is an explanation of the original. There is some easy math that someone could follow.

Patent 512,340

I started with 3.5 inch inside diameter and 32 Turns. awg#36 or .005 inches, the spacing (relax the design)
Check with an LCR meter may need to take a bit off to adjust uH.
For lower frequency add more turns. it is the neutralizing effect and the added capacity that is quite remarkable.
For over 100 years engineers have preffered the less efficient design.