Joule Thief

[jadaro2600]

@ jadaro2600

Are you using air core coils? It may not be the magnets, it may just be that you are bringing something magnetic into the field of the coils - plain steel may do the same thing.

These are prefab inductors with ferromagnetic cores.

I've attempted to setup a few other tests but they've failed, I think I fried my transistor in the process, oh well, ..12 cents of equipment.

Anyway, I'll try some other adjustments, The idea is to use only a single inductor - which can be done with two transistors, as has been seen elsewhere.  I'm trying to fit the entire circuit down to the size of a flashlight bulb, using that setup, I can create a flashlight of longer battery life, or fewer batteries.

[sparks]

  Intersting series circuit dont ya think.  I cant figure out which battery is discharging and which one is charging.

Think 3jt running out of phase   

[Mk1]

@jadaro

I lets both bulb run for 60 min and there is no heat on either the on on the secondary or on the transistor.

Mark

[jeanna]

Mark,
The coil on the video looks like the one that has a lot of spaces on the primary. Then I see the whole width being a single layer secondary of thick wire.
Is this right?

jeanna

[Mk1]

Mark,
The coil on the video looks like the one that has a lot of spaces on the primary. Then I see the whole width being a single layer secondary of thick wire.
Is this right?

jeanna

That sounds right .

I will re-post the picture .

http://www.youtube.com/watch?v=wS935WyumjY

On the video i try to put as much visual info as possible but my camera is so crappy .  And this is the same one i posted a while back.

I am planing a new video if my battery allows it , they don't seem to hold the charge anymore. This time running a motor .

Mark