Joule Thief

[xee2]

@ jadaro2600

Coils are normally put at 90 degrees to each other to minimize the coupling between them. Theoretically there should not be any coupling between wires at 90 degrees to each other if everything is ideal. But, in the real world nothing is ideal and so there is actually a small amount of coupling. I suspect it is the parts of the coils that are not at 90 degrees to each other that are actually doing the coupling. But if not, then it would seem that you have done the impossible - congratulations.



EDIT: The components of the green turns that are parallel to the copper colored wires make one turn that is parallel to the copper colored wires. Thus you have a 1:N transformer. But, the one turn part of the green coil has its own inductance due to the parts of the coil that are not parallel to the copper colored wires. This makes something equivalent to a 1:N transformer with an inductor in series with the 1 turn coil. However, it is more complicated because the inductor is not on ether end of the 1 turn coil, but is in the same place as the 1 turn coil. Thus the voltage that builds up across the inductor part of the green coil when the magnetic field collapses is also across the 1 turn coil. A very complicated situation. This should give you much higher voltage multiplication than would be possible with just two parallel air core coils.

[jadaro2600]

@ jadaro2600

Coils are normally put at 90 degrees to each other to minimize the coupling between them. Theoretically there should not be any coupling between wires at 90 degrees to each other if everything is ideal. But, in the real world nothing is ideal and so there is actually a small amount of coupling. I suspect it is the parts of the coils that are not at 90 degrees to each other that are actually doing the coupling. But if not, then it would seem that you have done the impossible - congratulations.

I think its the fact that the currents are flowing in opposite directions that make this work.  I may release a video of what I've done and implement all three circuits in one go, but don't expect me to narrate - I'm shy,   I don't know why the strobe setup or setup 2 works except for the fact that it's already flowing back onto itself ..feedback, just like it's supposed to be.

the strobe setup works two ways, with it as shown or with the 400 pF capacitor bridging  to the collector or from where it is bridging to the base. OR with the capacitor bridging the collector AND the base.  The only difference is the speed of the strobe.

Anyway, these are the circuit diagrams for the three setups that I've mentioned recently.

[Pirate88179]

@ Jadaro2600:

Good work.  Thanks for posting the circuit diagrams.  Keep it up.

Bill

[jadaro2600]

@ Jadaro2600:

Good work.  Thanks for posting the circuit diagrams.  Keep it up.

Bill

np,

Here's something interesting - two pictures to end the evening.

[Mk1]

@all

I removed the resistor from the jt and replaced it with a diode , it works , with 2n34a 1n4148 and also a led . Interesting i got about 13 to 15 volts per coils and up to 22 volts with a resistor , no amps reading bad fuse, one coil lights all my 9 led no problem , From a button cell , and the nano mk2 , the toroid is the same size as the button cell.

Mark

@ Jadaro2600

Real interesting keep it up!