Joule Thief

[TinselKoala]

Thank you Wings!!

FWIW, here's my 10mH JT lighting 4 x 90 Volt NE-2 neons in series, running on one depleted AAA battery at 0.93 volts.

[hartiberlin]

Nice lights TK and thanks for your useful tips on MOSFETs.

Well,

again any idea ? :



I had seen 2 videos from a guy on youtube, where he just used 2 different metals to power a coil via  some kind
of Joule Thief...
In his second video he used his window metal  frame and a ground rod outside...

But I don´t find this video anymore...
He did not use a battery at all and he said, he could power his coil this way....
He was using a transistor to switch it and looked simular to a Joule Thief circuit...

Does anybody still find this video on YOutube ?

Many thanks.

Regards, Stefan.

[hartiberlin]

There was just posted a circuit diagramm here:

http://laserhacker.com/forum/index.php?topic=70.msg634#msg634


I copy it here also for all to see directly here:

[hartiberlin]

I guess there is still an error as both collectors of the 2 transistors will need to be connected together...
and NOT VT1 to the powersupply cap !

Regards, Stefan.

[gadgetmall]

Stephan i am up and running with the diagram posted and corrected by ground loop .The collectors are NOT connected together  and the above diagram looks wrong .. .. WOW . i don't think it can be measured correctly with digital meters . I am using his exact cap with a 5 volt lipo . I am lighting a 220 volt led bulb with just one wire . This circuit even untuned draws nothing and appears to charge up more than you start with ..

the reason i say it can't be measured is because with the meter across the cap with the circuit off i read 4.98 vdc with it on it increases to now 5.03 . also i am using his Ecore . it it brighter with the ferrite out of it . AIR CORE  Cool circuit .

Mine is wound with about 3000 turns secondary and 15 turns primary but i have not got it to resonate on the cap alone . I have got shocked with the battery disconnected and see the led bulb flickers when i move the ecore in and out .


Where is Tk he need to try this . This IS wILD

EDIT . Oh . pay to refresh TK NICE !!!! . hey if you get a chance try the circuit ground loop posted of laster sabers . it is VERY Interesting . Why would a battery go up in voltage on his circuit . Im scared  one wire too ...

dare i say it >1 .. I am uploading my experiment . Please excuse the mess and whittlings on the bench . i need to cleaan it . I think this is a very nice low power circuit .Also it will run from a 1.5 volts . I need to wind the primary until it starts everytime..


Gadget