Joule Thief

[jeanna]

Gadget,

Would you please help me with the thermostat thing?

I see it is a switch.
Is it a standard switch I can buy at the hardware store?
I think it is unusual voltage, and I bet it has more than 2 wires in it??

thank you,
I am so glad you saw this!!!!!

We can have that cuppa tea soon.

jeanna

edit
Great Paul!

I am so glad it has helped.

[poynt99]

jeanna and gadget,

If you moved the operating frequency of this device way up there in the MHz, it might be possible to have it work without any core at all. However, in this case all 3 windings would have to be wound tri-filar.

If we go back a step and think only of the basic JT circuit, there are now only two wires that need to be wound bifilar. The circuit relies on the coupling between the two windings, and in that sense they are simply two closely-coupled but separate inductors. One is for generating inductive kickback, and the other is a pickup coil that triggers the transistor.

So, it's only terminology and I don't expect you to understand or even care, but technically speaking, the connection between the two coupled inductors is not a center tap.

.99

[gadgetmall]

Gadgetmall:

All drawings updated as you requested.

Bill

Thank you Bill . man o man


@paul . so you have never actually made a jt huh? your a newbe just pokin fun and trying to break the ICE . . regardless of how to wind it its cenertapped to positive of the primary battery . thanks for you interest .

L8r supper time

gadget

[PaulLowrance]

So, it's only terminology and I don't expect you to understand or even care, but technically speaking, the connection between the two coupled inductors is not a center tap.

poynt99,
When some of the poster here say "center tapped," they might be referring to their own lingo. Who knows. I have gadgets circuit running nicely in spice. So at least I know it oscillates. 


Gadget,
I don't see the big deal with people trying to get the details. You people are using unconventional descriptions. Maybe more people would replicate it if the drawing was clearer. Anyhow, I gather that my last drawing was correct?


Paul

[innovation_station]

thank you everyone

nice to see you agin 99

j  your so patient!  my my

sorry gadget and everyone .. didnt mean too ..

lol

but its ok !   we gonna pick up the pace really soon 

w