Joule Thief

[innovation_station]

actually my results were poor probally the fine wire not makeing good connection i will test it out today more but ...

i bet the 2 turn as above will produce more ..  i think the wire is too fine on the jt

but i only tryed it quickly when i finished it so i can not say for sure .. right now

but i dont think the results will be better

i like the 808 style wich i never posted the pic yet as i get 285v from 50 turn and it is split like the mk2 style .. 

o so many ways to do it i better get to work now 

ist!

this is the 808 MK2 style 285vdc 50 turn 30 ga

btw this is basic 808 the real one will have 2 infinity signs  and an o collector  lol plus pnp and  npn of course ... lol 

  im almost at 11vdc in my 12v 3.6 ah battery .. from my aa charger board sure it takes 2 days ... but   so what .. lol  i started at 7.1 vdc in the 12v

ill post a pic of the finished unit all hooked up and chargeing today ..

single phase npn only unit really basic

[gadgetmall]

i'm trying to duplicate this simple JT circuit shown here::

http://www.instructables.com/id/Make-a-Joule-Thief/

but thus far have had no success lighting 1 LED with a single AA battery like is shown here.

theres just not enough power available.
is anyone else having this problem??
perhaps im just not equipped with the joule thief "talent"?

im not to the point of calling this a hoax,, but this is not working the way people say it should.

i have verified that the transistors are turning 'on', and passing power through them.  But the power im getting is exactly what the battery is putting out, nothing "thiefed" here....

Try Switching your Collector and base wire , that's usually the problem .Polarity also . We Dont HOAX round here . It DEFINITELY no talent on your part  for sure  I suggest you start on page one on this thread . the Basics are in the first 100 post .We are way too advanced here for starter even though we will still try and help you . Good Luck .
Gadget

[jeanna]

i'm trying to duplicate this simple JT circuit shown here::

http://www.instructables.com/id/Make-a-Joule-Thief/

but thus far have had no success lighting 1 LED with a single AA battery like is shown here.
...
i have verified that the transistors are turning 'on', and passing power through them.  But the power im getting is exactly what the battery is putting out, nothing "thiefed" here....

Hi Sm0key2,
I suspect if all the wires are right, and they may not be yet, that the core is either choking too much or too high permeability.
Either way seems to stop the action.
You must have an oscillation that starts and stops the coils. Without that, all you will get is the action of a single battery.

It is not the amplification of the transistor you are after, it is the switching.
So, knowing that it is working is great, but now, can you see it turn off?
I suspect it is fully on and not turning off ever.

I know there are folks who will help you, but we might need you to find a way to upload a picture so we can see what is happening.

Have you watched how Bre Petis connects the wires yet? [makezine video]
http://www.youtube.com/watch?v=gTAqGKt64WM
That is the first step in my suggestions.

keep on trying...

jeanna

[innovation_station]

im 99% sure what is wrong with my 3 phase npn unit .. 

i increased the mass of the primary but not the mass of the secondary ..

and my output droped big time ..  plus i dont have dow for more trsansistors so i used what i had .. 4401 i have an abundance of them .. 

but i like to use 2n2222 they work kick ass!

even on a 3.6 v pulsed supply 

no heat .. 4401 apear to heat up ... a bit even on a 1.5 v supply ..

but its a mass primary to mass secondary thing as well as wire length toroide core tuneing magnetic tuneing and the BRIDGE IS DARN IMPORTANT TOO  ...  as there is a diode resistance factor ..

too many things to consider ... 

lol

ist!

ok jeanna i found A CRAPPY 1 INCH GOLD MINE...  all i can get is like 70 v i tryed everything

is it the coil 2 10 120

wich is now 2 2 100 30 ga .. 
its a lousley core ...

i will from now ON TEST EVERY TOROIDE B4 I WIND IT LOL  sheesh! 

almost had me there ... lol 

ok im starting over

im useing 2 turn jt on 1 place on the core ..  i get 6.8 v per turn ..  now i will wind 100 turns on the same core ..

and i should get close to 700v as the math sedjusts ... see how it goes

[xee2]

@ ist

im useing 2 turn jt on 1 place on the core ..  i get 6.8 v per turn ..  now i will wind 100 turns on the same core ..

and i should get close to 700v as the math sedjusts ... see how it goes

Jeanna posted data showing that voltage does go up about as multiple of turns. So if you are getting 6.8 volts for one turn then I would agree that you should get over 600 volts for 100 turns. Please post results.