Joule Thief

[altrez]

@all

I have been testing input verses output and looking for any positive results. Yes I can light 140 LEDS from my jt! However they are not producing the same type of power / watts / lumens as if they where plugged into mains.

In fact even if I just use 10 LEDS rated at 3.7 volts and 30ma in series they are so dang bright with the JT and yet still do not produce the same amount of power as if I push them with the right type of power source.

So my question is that even when we push out 20000 plus volts with the JT its still not producing any more power then what the 1 AA is capable of delivering to the circuit or so it seems to me?

So if I am correct a AA battery can only produce 2.4 watts per hour tops. So it would be impossible to run a 15 watt tube from a pickup coil at full brightness no matter if you had a 1000000 volts on a pickup coil.  I do not believe anyone has successfully lit a 15 watt tube at full brightness for any length of time yet with 1 AA battery? I could be wrong please correct me if I am and also post detailed notes of how you tested the brightness of the tube.

So my question is simply this. Is there any real reason to keep pushing the voltage up? And if so why? What are you the experimenter trying to accomplish? What do you think will happen? I know I have a 900.000 volt stun gun and it will not light a 20 watt tube at full brightness so is the goal of this to try and hit millions of volts and if so what then?


-Altrez

[xee2]

@ altrez

So my question is simply this. Is there any real reason to keep pushing the voltage up? And if so why? What are you the experimenter trying to accomplish? What do you think will happen? I know I have a 900.000 volt stun gun and it will not light a 20 watt tube at full brightness so is the goal of this to try and hit millions of volts and if so what then?

I am just curious to see what can be done at this point.

[altrez]

@ altrez

I am just curious to see what can be done at this point.

Fair enough I am very curious myself

-Altrez

[altrez]

hi all,

another vid with a different AA board also found in a diposable camera.

check it out...http://www.youtube.com/user/BiDaDiKuNuKu


Peace!
V2DAY

Nice work! I really like your youtube page as well I have a question for you. I read your comments on your youtube video. You say the light output is around 30% how did you come up with that number? That would be 9 watts of power. What is the Volt and amp draw from your source battery? And what is the amp / volt draw on your output?

-Altrez

[jeanna]

@all

I have been testing input verses output and looking for any positive results. Yes I can light 140 LEDS from my jt! However they are not producing the same type of power / watts / lumens as if they where plugged into mains.

140 is not shabby.
140 leds is more than my stringolights has and it uses mains power. It has 35 in series with 2 directions built into it. That is full brightness, I believe, and I am sure you are getting that.

Not only that, you can put 10 in series with 14 in parallel and be careful they may blow out after full brightness...

But this is not really your question, I know that.

So if I am correct a AA battery can only produce 2.4 watts per hour tops. ...

and then it runs out after one hour...

I do not believe anyone has successfully lit a 15 watt tube at full brightness for any length of time yet with 1 AA battery? ...

The 7 watt tube I lit the other day was at full brightness. The 15watt tube was not, however it was good and bright.

So my question is simply this. Is there any real reason to keep pushing the voltage up? ...

Hi Altrez,
I have been asking this too, and I do not have an answer.
I thought I would be able to "see" the amps when I got the scope, but evidently not and it is always suspiciously interpolated, rather than shown.
It doesn't show, it is assumed by any results.
I cannot argue with this or anything about this, but, I did and still do find it odd that there is no direct evidence of the amps beyond what the circuit produces.

It IS the reason I have talked about the quality and the shape of the wave.

And, because of that I am a great fan of the MK1 designed pickup.
On the scope this has a different shape, and it is more like the sine waves of the mains.

I find it curious that 450 volts is minimal voltage for lighting the tube, when the wall is 120. I know the boost is needed when using the wall, but I do not think that the ballast in a fluoro tube brings it so high as 450 and keeps it there.

But the curve of the wave from the mains /wall line spends a lot more of its time above the x axis than many of the waves I have produced even though they also happen to light many leds.

This   -/\/\/\-
must be better than
this   --|-|-|--
even if they do have the same peak to peak voltage.

It is also why I ask about the frequency making the thing work better.
         -|||||-

I don't have an answer either, of course, but I like your question.

jeanna