Joule Thief

[jeanna]

I want to add the math part, just cuz.

The 45 degree angle is only produced when the distance of each segment around the circumference of the tube is the same as the height of the tube.
It is the reason I believe the pvc connectors will not work. They are too tall for the circumference,and you cannot get that angle.
MK1 did the figuring for the 10 segments.
[Actually, the degree mark on the circle is 72 degrees, not 70, if I understand what that was about.]

6 segments is easier for anyone to figure and therefore might be a better place to start.

Figure the circumference by measuring it directly, or measuring the diameter and multiplying that amount by 3.1416.
You can also make a paper template of the circumference and fold it into 6 equal parts.
This 1/6 around the circumference must be the height.

The same holds true for the 1/10th.
Do it as MK1 has shown, then measure between the segment marks of 1/10th and make that your height.

Any of these will probably work, but the numbers must be even.

I think it would be really interesting to see the interplay between the 6 divisions and 8 divisions all in the same core.

I hope this helps with the recipe for 45 degrees.

===========
@xee2,
This is really great, because you are boosting something twice, and this can be done with this small part.
20T,20T on the goldmine!
very interesting.

I see that you must be getting those numbers from what is printed on the coil.
I have a few of these from various HV boards from cameras and cfl.
I am wondering how to pick the right wires.

When I was doing this to make jonnydavro's HV sec thing, I could not get a good reading from the end wires, so I guessed.
I am not satisfied telling others to guess. Is there a tried and true way to KNOW which is the HV ( and which are (2), and (10), please?

thank you,

jeanna

[crowclaw]

@ All
This is the JT circuit to my EMPT did not have chance to post sooner

[innovation_station]

J 

and mk1


this is some of the most important info !

much thanks .. 

altho mk1 ...  is still on learn !

i will continue to finish video add more pics and doc the boost cap!

results .. 

later on ...

good day to ALL!

W

[crowclaw]

I just replicated crowclaw's latest offering, (the Helmholtz-coil looking air-core JT.)

I got two white LEDs to burn bright at several inches above the lower coil assembly, (which ran off a 1.0V AA battery.)

I wish I had not lent out my 'good' camera, I would like to show a few photos.

Well done... did you use the same dimensions for your former etc? I have also run this up at around 25 volts using an IGBT (cross between a mosfet and transistor. The distance increases as does the voltage amplitude!

[stprue]

@Mk1

Thank you for taking the time to explaine, I think I understand now.