Joule Thief

[electricme]

@stprue,
Thank you muchly for the kind words.

I have a problem, I need about 6 volts to use to switch a big current transistor, mabe I will go to bed and sleep on it, ha ha.

@ electrime @ Jeanna

There is really some great work being done by you guys.

Nice pics!

Got some more photos of the progress.

0679 = Diodes now soldered to one leg of each seperate toroid.

0680 = Any output? YES Yippee, well I needed a cheer me up.

0681 = Side view profile of the 7 Pak, showing the Capacitors and some of the Green LEDs.

EDIT oops, I just noticed I have reposted the 2 above photos before, nevermind.

jim

[xee2]

@ electricme

OK here is a question, how come the green LED is on at NO current draw?
I made a mistake, can you find it?

What is the minimum reading on your meter? I suspect that there is current flow but it is too low for your meter to read.

[xee2]

@ jeanna

Your data seems to indicate that the frequency is increased as the base capacitance is increased. Yet you said a while ago that you could see the spacing between the pulses increasing as the capacitance increased. Thus I would expect that the frequency would decrease as the capacitance increases. Can you check this out?

[stprue]

@  electricme

Why not try small transistors for each or a few med. sized one!

[stprue]

@ Mk1

Any new progress on your Mk x2?

I have just purchased some ferrite toroid's that are 3.38" in diameter, I don't have any permeability or flux specs.  Maybe you know, they are from all electronics.  Anyways when testing a ferrite I remember you mentioning using 1 wire looped around 1 time, and then put voltage through it/use a bridge and look for fluctuations! Is this correct.  How do I know when I have maxed out my turns on any part of the coil?

Do you have any recommendations on a coil of this size? Amount of turns/gauges/what voltages to expect?

I have one more question on winding.  You told me that when winding back down you only overlap 1 time.  Is this correct?  On my coil it seems like you have to overlap on both the inside as well as the outside of the coil to correctly wind back down.  Maybe I'm wrong but it looks like you would be back winding on the inside if you don't overlap on the inside of the coil.

I hop this isn't to confusing.