joule thief 2

I want to see a Joulethief with a 10H transformator. The point off this circuit is, that it is smaller than a transformator.

First, a transformator is a transformator is a transformator. Second, read "joule thief" translate it and make a new story around which might fit better than your first farytales, pipo LeButch.

i made a joule thief using a transformer I salvaged from somewhere (i get alot of TVs, microwaves, stereos, ect. from the dumpster of my apartment complex and thats where i get most of the parts and components i use to build circuits). I dont remember specifically what i pulled it from but it was a step down transformer 120Vac Mains to 12Vac. I measured tge

*the inductance of the primary and secondary coils. I measured 7.1H and 80mH respectively. So im not sure what youre getting at, LeButch, when you say you want to see a 10H transformer with a joule thief? And while, yes, this circuit can be made to take up very little space if desired, I would argue that the 'point' of the circuit is not to be 'small'. Circuits exist to serve a purpose. The point of any circuit is to perform some task. I'd say the function of a joule thief is to convert a DC voltage to a higher DC voltage to power a load that requires little current but a higher voltage than your source. Most obvious example: an LED. They need a small current to illuminate but a AA battery with 1.5v can't provide the voltage across an LED needed to switch it on as the voltage drop across LEDs are typically 2.5V +.