Joule Thief

[Pirate88179]

Jeanna:

I read somewhere a while back, that filament bulbs were neither AC or DC.  They will light under the right conditions with either power.  But, after my joule thief experiments, I found that they take (in our world) a tremendous amount of power to heat the filament.  Kind of like your toaster analogy or a water heater or an oven.

That is what fascinated me about the Georgian guy because he was lighting all of those filament bulbs from a starting power from the earth.  I knew right then that he had real power and not like my experience with the earth batteries.

Bill

[stprue]

@Jeanna

Room3327
Jr. Member

Posts: 86

  Re: Tesla Patent 382282, and all related to his transformers/converters
« Reply #45 on: March 19, 2009, 06:16:40 PM »Quote Here is the correct way to wire the field coils if you actually want a rotating field.  Wired the way I show in the schematic above it will not rotate or work.
Yes, robbie47, copper coated steel welding rod works pretty good for a core in transformers. But this is not insulated remember so eddy currents can form unless varnished or insulated. I used it as is for this.
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[stprue]

@Jeanna/MK

After looking at this pic for quite some time I see that it could only be done with 4 separate wires or 2 wires crossing low (not x2 per say) kind of like an upside down peramid.  Do you see any other ways to do this?  As is it looks like each side would cancell out the other!

[resonanceman]

I thought halogens were not a filament lamp. I thought they were a gas I guess because of the name.

Jeanna


they  used to be called quarts halogen   
Quarts because normal  glass could not   take the heat .

You are right .......the name  is  because of a gas
The  advantages of  haolgen  bulbs over  regular  bulbs is because of the  gas
There is what is called the halogen  cycle ,
If  the  bulb  is  operated at  a high enough temperature  the  tungsten  that boils  off the  filament  is redeposited  on the filament  rather than on the  inner surface of the bulb.
The  dark patches  near the ends  of  old  floro tubes is  tungsten  that used to be part of the filaments

I hope that you have enjoyed  this useless information 



gary

[resonanceman]

@Jeanna

Room3327
Jr. Member

Posts: 86

  Re: Tesla Patent 382282, and all related to his transformers/converters
« Reply #45 on: March 19, 2009, 06:16:40 PM »Quote Here is the correct way to wire the field coils if you actually want a rotating field.  Wired the way I show in the schematic above it will not rotate or work.
Yes, robbie47, copper coated steel welding rod works pretty good for a core in transformers. But this is not insulated remember so eddy currents can form unless varnished or insulated. I used it as is for this.
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HHhhhmmmm

Doesn't this  coil look  like  2  JT  primarys wound on the same  toroid?
It is  a little beyond me .......but could  someone  set  up 2 JTs  to  work  kind  of  like  a push pull  amp ?

I am not  very  good at  seeing  what  direction  the magneitc fields  will go or what  direction the curretent will flow .
If the coil was set up   as 2 JTs   would  the  output  from one  be positive feedback for the other ?

If  it  can  ge wired for  positive  feedback  it may  end up being   a simple  TPU


gary