Joule Thief

[jeanna]

Lights . this is too much light i will tuning this down quite a bit like a fugi and drop the input below 20 4 sure with some more resistance.
this is in the dark and its own light ! Top picture is turned down as low as it will go on a 10kpot and 2.2k resistor  second is wide open 2.2k  only

The rheostat at the battery positive works really great here.
It lowers the input voltage and really lowers the usage.
===

Gadget, How much empty toroid is there?
Is it all wrapped?

and related, where is the primary in rel to the secondary wire ends.
They appear to be all in one spot?

thank you,

jeanna

[gadgetmall]

The rheostat at the battery positive works really great here.
It lowers the input voltage and really lowers the usage.
===

Gadget, How much empty toroid is there?
Is it all wrapped?

and related, where is the primary in rel to the secondary wire ends.
They appear to be all in one spot?

thank you,

jeanna

Its all wrapped with #26 except one bare spot 3/4 inch . Two turns #22 and 7 turns #22 in the bare spot . I covered it with tape so where you see the thick wires is the bare spot with the primarys . they are close together and dabbded them with clear nailpolish then wrapped with blacktape . Yes i will get me a wire reostat and vary the Vin after i tune it up a bit more . Playing with a capacitor subistution box and setting a good solid oscillation so i can get it dimmer . Right now i cant get it any dimmer without puttg a 220k resistor resistor in series with the pot and 2.2k  So volts will be the factor to control this one .

[Pirate88179]

IST:

Just so you know, there is no such thing as over 24 carat gold.  24 carat=100% gold and you can't get higher than that.  24 carat gold is very very soft and mailable which is why it is not used much for jewelery that sees wear very often.  Also, another gold tid bit of info I learned from a guy at Bell Labs is that you could electroplate the entire outside of the Empire State building with under an ounce of gold.  The thickness of plating is measured in angstroms.

Bill

[kooler]

your probably drawing static charges off that rug you working on

just kidding

[Mk1]

@all

I think we get enough for the hairpin circuit !

A nice video with scope shot !

http://www.youtube.com/watch?v=AvCZG5ccPsk