Joule Thief

[jadaro2600]

Nice vids everyone; keep up the good work with the circuits.  It's always nice to hear a good explanation.  If you don't think you have the voice to do it, there are programs which can simulate voice that you can use to narrate - or you can use dialog screen like in the old B&W films.

I was thinking more about the basic circuit, and though I've asked this once before:

Does it matter where the resistor is ( directly to the base or not )?

Technically, the placement resistor at base would allow flyback to go into the other coil, assisting the coil to collector.  Does this make sense?

[Pirate88179]

Jeanna:

Excellent video!!  You always explain things so well.  I try to in mine but after like 4 takes...I say it's done and process it.  Then I watch it and see all kinds of things I left out.

Where did you get those led grid lights from?  I have not seen anything like them around here. 

You explained a complicated circuit so that even I could understand it.

Bill

[innovation_station]

ill fire first ...  KOOLER THIS IS JUST THE PROJECT FOR YOU  REPLACE MULTI TAP POINT TO MAGIC TOROIDES ...    then  TURN COUNT THEM TO TUNE IT ... FOR OU PUT ...

the place ment of the resistor in a inductance system ..

  ie high selfinductance high winde count  coil ..   for 1 it makes the kick   and chokes it and forces the kick where you want it to go

so in theory ...  you can have 2 coils low and high  then you can have MANY OF ANY DESIRE  IN BETWEEN AND REDIRRECT THE KICK TO EXIT THROUGH THEM  ALL AT ONCE  ...  THIS is electrical i speak of ..   

magnetics it dont care  throw wire on it you will get something out of it ..

hope you can understand what im trying to say ...

ITS kinda an inductance kick transformer of many desired voltages ... verry much FORCE FEED!

meaning  spark gaps  or bridges ...  to BLOCK IT ...   so it dont flyback and blow up source..

; )

common tap point all multi coils .. common ground

thank you !


H
realy crude text art ....   but i tryed


ground here                                                                            source
h                                                                                                  l

tap point  multi coils here ............><..............  mirror other side in reverse

l                                                                                                   h
source here                                                                             ground


and this is only half it ... 

it gets CRAZY FAST!


caps are prefered as there DISCHARGE RATE  is extreamly fast ... lol ; ) and choke  cant / wont take it ...  so it bounces back ...  only a tiny bit makes its way to ground ... the rest flys out as output on the multi coils with the flyback kick ...


like i have only drawen half of it ...   common pos... hummmmmmm

[kooler]

bill
these have some good reflectors on them

http://www.goldmine-elec-products.com/prodinfo.asp?number=G17279

http://www.goldmine-elec-products.com/prodinfo.asp?number=G17281

[jeanna]

I was thinking more about the basic circuit, and though I've asked this once before:

Does it matter where the resistor is ( directly to the base or not )?

Technically, the placement resistor at base would allow flyback to go into the other coil, assisting the coil to collector.  Does this make sense?

In the way lidmotor added his rheostat to the basic circuit it changes only the ampsdraw.
There is a fallout from that in that the volt spikes are lower, but unlike putting all the resistance at the base, the frequency seems to change very little if at all, so yes, there is a difference where you put the resistor.

I knew for instance that I needed over 1000 volts for the 3 led bulbs, but I was very concerned that I would pop one whole bulb if it got all 1000 volts, so, I added the resistor in line with the pos battery connection. It is where you would put a switch.

What is on the collector is directly related to the power out of the secondary and the oscillations work as a unit, as far as I can tell. xee2 was the one that figured how one part worked separately from the other.

@Bill,
I get those led lights from wallmart lighting department. They cost just under $6.
As I say in the video they are really equivalent to 25w bulbs, no higher, but that is how I am beginning to view all leds. I am kicking myself for not buying a chinese spotlight that is made with 100 leds facing out in all directions. I think it would be a perfect conversion to a 100w filament bulb, and I KNOW I could make a joule thief secondary to run it. I should just go back and buy 3 of them... maybe I will.

thank you,

jeanna

kooler, I will check out your HD video now.