Nathan Stubblefield Earth battery/Self Generating Induction Coil Replications

[IotaYodi]

This may help you to visualize.
http://www.allaboutcircuits.com/vol_2/chpt_9/5.html

[dllabarre]

This may help you to visualize.
http://www.allaboutcircuits.com/vol_2/chpt_9/5.html

Scroll down the page of the above link to the example of boosting.
This is what I believe is happening with the Joule Thief.

DonL

PS: I posted this on the JT forum also.

[the_big_m_in_ok]

jeanna said:

BTW the little short wires are on the lower right. I say this cuz you cannot see them!

I looked at your picture(Reply #2493).  The transformer appears to be an industry-standard-type that allows for center tapped secondaries.  Radio Shack used to sell them, and may still do.  I can barely see two wires on the right side.  The other side has inch long, heavy wires for the 120 VAC primary, right?  This transformer type is also useful for printed circuit boards, or they were years ago, from my memory.

That grey silvery thingy to the right?  Isn't that a printed circuit board?  Something convenient to mount stuff like rectifier diodes on?


--Lee

[jeanna]

... The transformer appears to be an industry-standard-type that allows for center tapped secondaries. ...

Oh so, maybe that is the reason for the 4 wire ends.
I destroyed the circuit board when I tried to remove it and the part where the centertapping would be clear shot off somewhere and I have not yet found it. I am glad you explained this. Perhaps this is the meaning of the type 2 or class 2 transformer?

I guess I am now making it the way I want it by soldering end to beginning.

....  The other side has inch long, heavy wires for the 120 VAC primary, right? 

Yes, the thick red/orange ones.

...This transformer type is also useful for printed circuit boards, or they were years ago, from my memory.

Really? as a center tapped secondary?

That grey silvery thingy to the right?  Isn't that a printed circuit board?  Something convenient to mount stuff like rectifier diodes on?

I am glad I did not crop the board from the pic. 

thank you,

jeanna

[t3t4]

@ jeanna,

Oh so, maybe that is the reason for the 4 wire ends.

That's why I asked if this was a center tapped transformer, but I could only make out 3 taps (maybe) from the pic. It could be anything, but it depends on the number of turns on the secondary as well as the number of taps (connection point). Just because it's only using two taps, does not mean it can "only" use two. Do you know what I mean?

But you will probably only find multi-taps on the "secondary" of any transformer, not on the primary. The primary typically has multi-windings for isolation and for different input/output voltages. I currently use a massive 2400va toroidal transformer for power conditioning. It has dual individual primaries, and 5 center tapped secondaries. Which primary I use depends on what voltage I want on the secondaries.

t3t4