Joule Thief

[crowclaw]

but since the filament is so verrry thin, I expected it to glow at least a little , and it did not.

Is this really a high resistance circuit?


jeanna

Hi Jeanna, Let's look at an example to go with my explanation. You have a filament bulb in series with a modified cfl across the output of your JT winding. Purely as an example and to make the calculations easy, lets say our bulb filament  = 2 ohms and it requires 2 volts to light. From ohm's law V/R =I so our 2 volts/ 2 ohm's = 1 amp. so our circuit must supply 1 amp to light the filament. We now add in series a CFL (there's no resistance wire that runs through the CFL to light it, it's basically a gas filled envelope with an electrode each end) the resistance to the flow of current is quite high. Let's say it has a resistance of 10000 ohm's. The total series resistance is now 10000 ohm's + 2 ohm's = 10002 ohm's. Use ohm's law again... V=2volts / R = 10002. =0.0002 amps. So as you increase the series resistance, the current decreases. There is not enough current flowing through the bulbs filament to produce light. The CFL light's  up however; because it's current draw is negligible compared with the bulbs filament. (Note my resistance values chosen for calculation purposes only)  It's the CFL that can be looked upon as a high resistance, which means it's current draw tends to be very low, feed it with a high enough pulsed voltage and bingo it lights up... as you have proved so well. Merv

[innovation_station]

to amp or not to amp ?

to ant or not to ant ...

to transmitt or not to transmitt..

to answer or not to answer ..

the answer to everything and the answer to nothin ...

but how can that bee

were off to see the wizzard the Wonderful wizzard of oz! 

WELCOME TO WONDERLAND...

ALICE!

22 555 over 3 GM 11 JT

IM building it .... 

W

so to put this into understandable english... 

22 ga rs solid ...  high q wire ... ; )  48 turns per collector ring.. = 5' x 3 about 3 cores ...   slam 11 t jt top it ... rotating 1 dirrection .. 1 lap .. pull from all 3 cores .  and if ya want ... you can short the center one ...

check your winding dirrections .... : )

love ya !

LOL       I THINK I WANT TO CALL IT

                   ~THE SLIM JIM!~ JT!

http://www.youtube.com/watch?v=7AvAYyu49_s

COMEING TO KALI?  : )

[innovation_station]

here are a few pics of the 3 cores wound ... 

i may whip up a few more ..  see how this one turns out ...


ist!

so i will go 3 wire jt ... lol   normal jt plus feedback wire ....  : )

i will twist 555 as 1 ; )    and they w!ll all go !5   

[innovation_station]

i ended up going 15t jt  tree wire ...  only cuz it fit better ...


had to re wind it 3 times... 

say i yi yi

lol

pics all done ... ready to play it ...

ist

hey think i can wobble it?!!  lol   

[innovation_station]

hey do not get me started on the floppy eared floppy winde jt style...  lol  magnetic kick vibration   generator ...  dual dirrection same wire.... 


nut ...  ya wanna help me   hehehe  !

lol 


listen i can drive any sane soul nuts in a week ...   


thats why the gf left ....  lol 

: )


W

things that may go hummm...... 
: )

so what is that cork for anyways...  well i just invisined the most wild winde config ...  it will half to be solid thick wire ...   so it can support the core in the center but basically a M on its side outside and a ill try to draw it text...art

  /| |\
} H {
  |/ \|


the H is the toroide core

i may find an empty wire spool to make it of finer wire....  and loose enough that it buzzes ....

ILL 4 WARN YOU ALL 

as an NUTTER RA HA! 

user  may encounter MASSIVE  gryo EFFECT    CAREFULL WHEN YA PUT HER DOWN ... 

hear there still looking for some out there ... 

: )

hey look it fits right inside....