Joule Thief

[innovation_station]

whats up guys and gals..
i was wondering whats is the best circuit for a transformer with two leads going in on the primany 1-9 volts..
i got the push and pull right now the pnp and npn transistors together.. i was wondering if there is a better and lower draw circuit to use..
hey check.. this i bought two cheap-o- stun guns at the flea market and modded them for a lower current draw and of course a lower output.. but if you hook them in reverse on the outputs and tap in to it you get some some crazy kool output power..weird thing is it seems to be dc volts
but i got them for 10$ each and there rechargable.. i just got them for parts..but i am having to much fun with them..
already zapped myself..  but thats alright my life is limited anyway..

let me know

robbie

i got a few dummies you can use it on kooler !

: )

william

i hear gay boy talking about my pnp  npn unit ...  calling it his own too... 

i have a thred age old bout it ... : ) none the less !  it is in the TPU SECTION

joule thief the same as a pulse motor ... hummmmmm

[freepow]

  Hello everyone !     I have'nt been on this forum for quite a while, but i'm posting my results of my 
    home-made JT-mains power supply (with dimmer control) for LED light bulbs.
   
    Here is the pictures of it, the LED light bulb is an Australian 240v mains powered 20x LED light bulb.

    It is lit just as bright with my JT-mains power supply as if it was plugged into the 240v mains !

    I can now sucessfully make one or two of these JT-mains power supplies for each room of my house
    and then charge then up by a solar panel outside when needed.


    Each JT-mains power supply will last about 4 days at 4 hours per night (5pm to 9pm)...
    with  2x AA equalling about 2.5-2.6v at 2500 mA approx.
    It will still work fairly good even when 2xAA's run down to a total of around 1.2v

    If I want it to last much longer, I just add more AA's for more amps in my JT-mains power supply.
       

[Flux4Energizer]

Very nice build freepow 

[conradelektro]

To freepow!

I like your Joule Thief black out wall socket.

Would you mind sharing your circuit?

There seems to be a transformer next to the toroid?

How many turns have your windings on the toroid? Which transistor did you use (value of base resistor)?

I am trying to build a similar thing. After some unsuccessful attempts my circuit reaches about 320 Volts on a secondary. But this is not enough to light up a 5 Watt fluorescent lamp or the little tube taken from a 5 Watt CFL. Attached is a photo of the toroid giving 320 Volts from a single AAA Battery which must have at least 1 Volt (base coil 4 turns, collector coil 20 turns and the secondary has about 6 meters of 0,3 mm enamelled wire; basic joule thief circuit, base resistor 200 Ohm, transistor 2N3055). Also attached the photo of three small neon lamps in series (about 320 Volts).

Twenty to thirty white LEDs in series are no problem, I can do that with an air coil (base coil 20 turns, collector coil 100 turns and a secondary with about 450 turns, wound on a plastic tube with 25 mm diameter; all three coils are wound in the same sense on top of each other; gives about 120 Volts on the secondary; basic joule thief circuit). I use a full bridge rectifier after the secondary which makes the LEDs shine a little brighter.

20 LEDs shining brightly with an air coil is a nice achievement, but I want to light up small fluorescent tubes and the small tubes from CFLs, just to show that it can be done with an AAA battery, but I have not yet succeeded. Coming up with an air coil or a toroid for this purpose is tricky.

Greetings, Conrad

[freepow]

There is no transformer, only a 1.5" toroid x2 with around 120-140 turns on secondary, A used is a 2n3055 which I considor a good choice, and anyway I have lit a 4 watt 240v fluoro also a 5 watt cfl with components pulled out of it !  But they dony light any where as good a this 20x LED bulb, its very bright, I only need possibly 1 of these lights per room, I like the 20x LED bulb because I can just put it in my lamp and plug into my JT-power supply and be off the grid (lights only) at this stage !

My total volts on 2x AA which has around 2.5-3v , I get around 850-1050v, 3x AA = around 1100-1200v,
I will stick to 2x AA, maby add more more amps and then my light will last up to 2 weeks with more AA's
That means I only have to charge my box every 2 weeks !
Our electricity is going up 70% over next 1-3 years !!!
So best to light my house for free off the greedy grid!