Joule Thief

[Pirate88179]

@ Jeanna and all:

I am winding a new toroid today. (electronics goldmine 1" OD X 1/2" ID Ferrite)  I have a question:  I have wound 4 turns (bifilar) of 22 ga. wire on the right side from 2:00 to 5:00.  I am planning on winding a bunch (to be determined) of 22 ga. magnet wire on the other side. (This is all I have at the moment)  I do not want to put an led on the primary side, just like I did in my video "Earth Battery Lights 7 LEDS".  I am wondering if, after I put the wires that would normally go to the led into the breadboard power rail (like I did in the video) if I can then also put the secondary wires there too?  It seems to me that if I get any higher voltage from the secondary side, I should be able to place this in parallel with the primary power output on the rails and, it should be "in sync" as it is running of the same 3904 transistor.  I am trying to get all of the volts out I can for another earth battery experiment.  Has anyone done this that we know of and/or can it be done?

I know I need thinner wire for a real secondary but, I figure if I have enough winds, it should step up a little anyway. (Maybe not)

Thanks.

Bill

[xee2]

@ jeanna

64uF which one is that? Is that the clear/silver one?

No. It was the large black one that charged up to 300 volts.

I will try.
Maybe you could remove the 220pF cap and diode from the secondary and give me your results also.

Without the diode and 220 pF cap I would not be able to measure the voltage since I do not have a scope. With your scope you do not need the diode and 220 pF cap.

I do not think the size of the toroid maters too much but I do think that the transistor may make a difference.

[xee2]

@ jeanna

but they are cans with polarity so I don't thing they will substitute.

I also have a few 3055's that I could try.-- but I would prefer to put that off til later.

The "cans" will work. Best to put side with stripe to base, but should work either way at the low voltage across the base resistor.

I do not expect you to get exactly the same results.

I think you will get better results with the 100 ohm resistor using the 2N3055 when you get around to trying it.

[xee2]

@ jeanna

I did thin on my 2 tier ckt and the only response from someone was to tell me that high frequency could do that sort of thing.

That is true. Nothing really special, but some people do not seem to realize that.

[jeanna]

@ jeanna

That is true. Nothing really special, but some people do not seem to realize that.

I think it is something special and some people do not realise this.
It is a big clue to what Tesla discovered. 

I am really glad you posted it.

thank you,

jeanna