Joule Thief

[electricme]

@Mark
Thats a good explination you have done back a bit on explaining the way to tune the JT, however I am still confused.

Is there any chance you could make a video and post it on youtube giving a blow by blow account on tuning it, perhaps is several small steps, mabe make a series of them instead of one big one. I would find this much easier to follow.

I am a visual person, and this would help me no end, plus the more ways to explain it would be better for everyone.

Nice work with the labeling, now I am drawing a long bow, but if the MK1 is seen from the "plan" view, could you also add the points of the compas to identify the placement of each coil.

eg  North coil , South coil,  East coil,  West coil,
North and South coils are JT coils
West and East coils are secondaries output coils.

Just a thought.

jim

@Jesus,
Thanks for your remarks on my circuit, I plan to improve it using a switching 10 channel IC and mabe even cascade several to make more output.
We have to see how this prototype goes first.

jim

@ Jeanna,
I found my scope explination 4 beginners, it relates only to the JT, and have sent it to you.

jim

[nievesoliveras]

@nievesoliveras

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just like the jt coils

the reason the digits are reversed is that the coil is on the other side of the toroid.
kinda a mirror effect.
take a toroid, put a coil on it, then turn it 180 degrees, what do you see ?
what was on the right side is now on the left side.

all coils start to the left
turns are added going right of the start points
then back to start points over itself.

Check this out.

Jesus

[nievesoliveras]

@Jesus,

The MK1 has 2 windings on each side of the split bifilar winding. That is 4 wires all together.

1 piece of the bifilar on one side and opposite that the other.

Now, each pickup coil goes first up, then it returns down. So the start and finish of the pickup wire is in the same place.

This is what makes the MK series different from all other ways we have/ I have tried.

Go up then down.
Starting with a new wire and on the other side, go up then down.

I have to do something for a few minutes, but I will download your pic and draw over it. OK?

jeanna

Check the explanation on the new graphic composition and see if that is what you say.

Jesus

[nievesoliveras]

@jeanna

My blue Toroid is not from goldmine, but its useless i got four of them .

@jesus

Both should work , the second one is like 2 coils in one i would connect the battery positive lead to the middle of the toroid to make the 2 coils , but those coil are only on the jt side , and the toroid used will dictate the number of turns needed on the jt side.

Check the explanation of the winding on the graphic composition just poste and see if that is correct of the pickup coil. Then I need to clarify the other two coils winding direction.

Jesus

[nievesoliveras]

...could you also add the points of the compas to identify the placement of each coil.

eg  North coil , South coil,  East coil,  West coil,
North and South coils are JT coils
West and East coils are secondaries output coils.

Just a thought.

jim

@Jesus,
Thanks for your remarks on my circuit, I plan to improve it using a switching 10 channel IC and mabe even cascade several to make more output.
We have to see how this prototype goes first.

jim
...

Thanks for asking @mk1 to add the compass points and sharing your knowledge with us.

Jesus