Joule Thief

[hartiberlin]

Yes, Laserhackers last video is pretty confusing...

Here he did not tell, wher he connected his ground wire too...

http://laserhacker.com/forum/index.php?topic=70

Probably to the other pole of the LED bulb.
But it seems in the video he also has a greatz rectifier bridge in there....

Does anyone already spoke with Laserhacker and asked him about this ?

Many thanks.

Regards, Stefan.

[totoalas]

Hi Alex
Just drop by to say hello
As for the water batteries.... forget it as the Inventor would not open source it   and finally new ones had emerged and continuing to do so......
With the latest video of Laser on the ground connection.....
Maybe we can try a dual source  a dc and a dipole ground on the primary  as T 1000 had been telling all along ( see 411 of his post)
One Wire Safe Energy
and Alex, I think you were ahead of Thanes on that Bi toroid    LOL

Thanks again  my friend
totoalas

[hartiberlin]

Hi GL,
can you or anybody else tell me, why in a DC circuit to test the Darlington transistor
a Darlington MJE1100 is not able to switch a load,
if one touches with the base the positive 12 Volt supply voltage ( e.g. from a battery) and just switches
an incandescent 12 Volt lamp at the collector (emitter is at ground and the lamp is from collector to plus pole of the battery)

Very strange !

It only works to switch the light on when I connect the collector to the basis !

Very strange.. Is my MJE1100 defective ?

Was the same with the BDV66B, although it is PNP  when I used the reversed supply polarity...

Somehow the Darlingtons seem to work differently than normal transistors...

I thought they would just have higher current amplifications ??

[Groundloop]

Okay, I see.

I  only have here  BD 139, MJE 1100 and PNP Darlington
BDV66B

And a few MOSFETS like IRF 640 and IRF 840.

Can you get it to work with an IRF 840, because that is the cheapest MOSFET transistor ?

I guess MJE1100 does not have an internal diode but base resistors...

Hmm, these Datasheets are showing sometimes wrong pin connections... so you have to be carefull
noit to mix it up.... I just struggled to get a basic darlington to switch right...I had the pin connection wrong
from the datasheet, sometimes they show the view from above and sometimes from below from the
heat sink back view...Damn... I don´t have a 3055 here right now...

Regards, Stefan.

Stefan,

The MJE110 is a darlington without the diode. But it still have a 10K from the first transistor base and 150 Ohm at the
second transistor base. This transistor may work but I think you will need a resistor from base to plus rail to keep
the oscillator going.

I have not tried any mosfets in this circuit so I can't tell if mosfets will work. As far as I know, all mosfets has the body diode.

GL.

[Groundloop]

Hi Alex
Just drop by to say hello
As for the water batteries.... forget it as the Inventor would not open source it   and finally new ones had emerged and continuing to do so......
With the latest video of Laser on the ground connection.....
Maybe we can try a dual source  a dc and a dipole ground on the primary  as T 1000 had been telling all along ( see 411 of his post)
One Wire Safe Energy
and Alex, I think you were ahead of Thanes on that Bi toroid    LOL

Thanks again  my friend
totoalas

Hi Totoalas,

Yes, I have realized that you could not get any info from the inventor of the water batteries. So I have stopped thinking about that.
Thanks for dropping by. :-)

GL.