Joule Thief

[stprue]

@MK1

You should read up on some TPU stuff it helps a lot with JT.  I'm uploading a vid on this topic soon on inductive coupled wireless JT blinking an LED.  Sorry for all the wires. The frequency range can be all over the place but when tuned to the resonant frequency of the coils as expected I was able to pull the voltage down to 1.2v   

P.S.  This coil uses x2 style pickup and then 10-2 for the BC coils.  I can get over 500vdc out of it in a regular set up.

[Mk1]

@all

Jadaro ,helmholtz coil , we could make jt core coil out of copper like you did,
i made one a while back worked great .
Now what would happen if we made a second core coil like helmholtz coil , but the second one with a tank circuit on it , matched to the jt freq.

[stprue]

@all

Jadaro ,helmholtz coil , we could make jt core coil out of copper like you did,
i made one a while back worked great .
Now what would happen if we made a second core coil like helmholtz coil , but the second one with a tank circuit on it , matched to the jt freq.

I was thinking along similar line about matching JT freq with a different coil.  I think it could work.

[stprue]

@all

Inductive coupling to power JT wirelessly!



http://www.youtube.com/watch?v=llfJW3Yhjrk

[jeanna]

Hi stprue.

That is a very clear video.
Great going!

I was reading about dimmer switches last week, and
I was fascinated to read that the more modern less heating kinds are designed to alter the angles of 2 inductively coupled toroids to each other.
It looks to me as though this is what you are doing.
Since you are putting the juice into the system through one and changing distance etc of the coupled toroid, then rectifying it into the jtc.

I do not know if this is true, but also since it only works at or above the 2AA voltage level I wonder?

thank you,

jeanna