Joule Thief

[resonanceman]

We have not explored ac.
We have only used it as Tesla realized and Westinghouse agreed to let us use it.

We have a lot of exploring to do. = more fun.

Jeanna

I agree AC is different
It seems to  be one of those  quirks  that  are explained  away in overly  simple  terms

The laws about AC are not  even close to right .

It is  taught that  if  you have a transformer  with 2 secondarys  half of the   AC will be induced in each seconday
That  is  true ...........but  if  it is a high  frequency transformer it can really screw up  a TV in the next  room .
NOW .......if half  of  the  AC goes into each secondary ........what half  of the AC is  screwing up the TV ?
I think  the  truth is simple
When you induce   a magnetic  field  to change rapidly   it  affects EVERYTHING  around it       Understanding  how a MRI  works  should  be  proof of  this .

It is easiest to  catch  the power  right  at the source ........but  power  will be induced in any wire anywhere near  the  original source .

Here  is a llittle tidbit to think about
The  closer   you  get to the source .......the more  you affect the source  by  taking the energy
It is hard to  capture enough energy  at a distance ..........but  if you can do it ........it will have no  affect on the supply .
I think your   driving  LEDs  with the secondarys is partial proof of this
The secondary is  partly 'insulated " from the primary ......so  it does not  " draw " as much power from the  source .

gary

[Pirate88179]

@ Jeanna and Gary:

Another thing about AC that has been drummed into my head form when I was a kid.  "All AC is 60 Hz."  And, on our grid here in the US it is.....but......what about all of those other freqs. out there of AC?  JT secondaries, EB's and who knows what else is out there that is NOT 60 Hz AC.  I think this leaves a lot to be explored.  Actually, I believe lightning is AC (I believe Jeanna already mentioned this) as I have read that while particles flow from the cloud to the ground an equal number of particles flow from the ground to the cloud.  I was also always taught that lightning was static and "can't do any work".  Now, I don't know who wrote that in that particular text book but I disagree 100%!!

Bill

[resonanceman]

@ Jeanna and Gary:

Another thing about AC that has been drummed into my head form when I was a kid.  "All AC is 60 Hz."  And, on our grid here in the US it is.....but......what about all of those other freqs. out there of AC?  JT secondaries, EB's and who knows what else is out there that is NOT 60 Hz AC.  I think this leaves a lot to be explored.  Actually, I believe lightning is AC (I believe Jeanna already mentioned this) as I have read that while particles flow from the cloud to the ground an equal number of particles flow from the ground to the cloud.  I was also always taught that lightning was static and "can't do any work".  Now, I don't know who wrote that in that particular text book but I disagree 100%!!

Bill

Bill

I agree that frequency  is important .
It is another one of those quirks .
We are taught only the basics .
We are taught that the basics are all that there is .

Tesla knew alot more about frequency  than  most people know now .
Pulsing DC  is similar to AC,
Many of Teslas  later  projects  involved high  voltage high  frequency DC,
I remember reading that   he found   at  lower freqencys  a painful  stinging sensation was  felt .......and the sensation could not  be  shielded .
At higher frequencys   the  pain  was not there .   Tesla actually  made  a point to  spend time in these  high  frequency  DC fields ....... 

I do think that   at  when we start using higher power we should   start monitoring the  RF noise  that  a JT can  make .
for the larger ones it might make sense to keep them below  radio  frequency .......so  we  don't get the FCC knocking  on  our doors .



gary

[altrez]

BUSY PLACE ROUND HERE ...

A NOTE BOUT YOUR FAKE CHARGE ...

IF YOU EXPERIENCE THIS...   FREQ IS TOOOOO HIGH ON OUT PUT ...  PUT IN A CAP DC FIRST ...

YOU WILL BE FINE .... 

I DID THIS WITH A SINGLE PULSE MOTOR COIL IN MY PULSE MOTOR THRED FROM A SMALL 12 BATTERY I CHARGED 3 ... 2 DEEP CYCLE  LARGE SOLAR ONES ... AND 1 SMALL SAME AS INPUT ...

YOU NEED THE CAP ..  ASWELL IT NEEDS TO USE POWER ... CUZ THE USED POWER FILLS THE CAP ...  THE KICKS ...  RAISE THE VOLTAGE IN THE CAP TO PUSH ..

IST

Thank you for the advice!!!

What size cap and how would I hook it up? Would I go from the + on the bridge to one leg of the cap and the from the other leg of the cap go to the + on the battery?

Thank you!

-Altrez

[WilbyInebriated]

I do think that   at  when we start using higher power we should   start monitoring the  RF noise  that  a JT can  make .
for the larger ones it might make sense to keep them below  radio  frequency .......so  we  don't get the FCC knocking  on  our doors .



gary

why not just shield them, or explore the helmholtz setup that someone (sorry, i forgot who it was) showed earlier?