Big Joule Theif

[shlodo]

I think you should try swapping the charge and the source part to see if charging voltage really have power not just "surface charging".

Ive just put the circuit on a board and will do more testing, swapping batteries. Ive done load tests and it holds charge.

It droppped down a little bit after charging but not much.

I have not tried a current test to see if the crrent is going backwards. It could be tricking my meter.

-shlodo

[slayer007]

I managed to get my light a little brighter using a differant transistor for the trigger.

I used a 2n2222 for the trigger insteed of 3055.
It gets a little brighter with the 2n2222.
And then I allso hooked the Collector of 2n222 to one of the Hv side of the light.
And it got quite a bit brighter.

So now I'm using the 2n2222 to trigger the 2n3055 and the 2n2222 allso has a HV line coming from the light to the collector of 2n2222.

It uses a little more power this way but it puts out a lot more light.
And it has a lot more power on the charging side allso.

[shlodo]

I managed to get my light a little brighter using a differant transistor for the trigger.

I used a 2n2222 for the trigger insteed of 3055.
It gets a little brighter with the 2n2222.
And then I allso hooked the Collector of 2n222 to one of the Hv side of the light.
And it got quite a bit brighter.

So now I'm using the 2n2222 to trigger the 2n3055 and the 2n2222 allso has a HV line coming from the light to the collector of 2n2222.

It uses a little more power this way but it puts out a lot more light.
And it has a lot more power on the charging side allso.

so you have the transistors connected like darlington pair right? the 2n2222 seried with the 3055.

does the 2n2222 get hot, or does the heat all go to the power transistor??

Here's my new build by the way:

YouTube - Joule Thief - Build, Scope Shots, 10 LEDs 03

-shlodo

[slayer007]

so you have the transistors connected like darlington pair right? the 2n2222 seried with the 3055.

does the 2n2222 get hot, or does the heat all go to the power transistor??

Here's my new build by the way:

YouTube - Joule Thief - Build, Scope Shots, 10 LEDs 03

-shlodo

No it dosent get hot at all.
But i'm just running it off one or two AA batterys.

[boguslaw]

Is this original schematic used ?

I'm wondering if I could use that circuit to charge photoflash cap to dump it across xenon tube and coil... How could it be done ? Maybe by using diac to prevent overcharging cap ?

I'd like to build automatic device for generating magnetic pulses whcih will charge 400V photo cap and dump it across xenon tube and big coil for generating magnetic pulse which has healing capabilities.

I'm not electronic , maybe someone with experience could propose such modification of Joule Thief circuit ?

[Lidmotor]

My Replication of the Slayer007 1.5 volt CFL

@Everyone-----I finally did it and IT WORKS!!!!!!! You can light up a 13 watt flourescent bulb with one AA battery using Slayer's circuit. Follow the directions and use the 2" ferrite core and the magic happens. Thanks much for this circuit Slayer. .
Here is the video of my replication:

YouTube - Slayer007's 1.5V CFL---- My Replication


Lidmotor

[Xenomorph]

Simply amazing!
A CFL that runs for days on one battery

[Bast333]

Lid, I'm speechless.
Excellence is becoming a standard around here.
Just. Awesome.

[Bast333]

Slayer, You are truly a class act.
Fantastic circuit.

[slayer007]

Slayer, You are truly a class act.
Fantastic circuit.

Thank you Bast333

Very well done video Lidmotor.

Thank you for posting it.

[StevanC]

Now I have to build one too

[boguslaw]

But where is schematic of Slayer circuit ???

[slayer007]

But where is schematic of Slayer circuit ???

Hello boguslaw

The circuits on page 4 Posts: 113.

But I'd change the trigger 3055 to a 2n2222.

It seems to work a little better having the 2n2222 trigger the 2n3055.

[Bodkins]

Great Work Gentlemen

Slayer007
Lidmotor

I dont what to tell people what to do but if someone could trying connecting the negative of the charging battery/Cap to ground you may increase the charging.
Try getting the cap to the highest it will go then connect the ground and see if it goes up More with the ground on.
If it goes up tell me and I will give a understanding on the process which ends up in higher charging!

Good luck All
Bx

[slayer007]

Anyone ever try to pick up the negative BEMF from something like this or a bedini?

I noticed it's allso sending out positive BEMF and negative BEMF.

I have one of my diodes turned around backwards on the 2222 transistor.
I can connect that to the negative of my meter then for the positive I go back to the negative of the source.

It seems we can collect the back emf both way.
When the magnets turning on and when its turning off.