Akula0083 30 Watt Self Running Generator.

[MenofFather]

What frequency and load you are applying? for 15T primary, LEDs on load and high resonant frequency it should be low...
Also the duty cycle must be not 50% - less than 20%.

Load buvo įvairus, nuo nieko iki šviesodiodo per 100 kiloomų rezistorių. Padarius duty cycle 20 proc. kiek sumažėja naudojama srovė, bet vis tiek pakankamai didelė. Kiek girdėjau, užvyniojus rites ant įvairių pusių, naudojama srovė sumažėja, gal taip ir reikia vynioti?

[Dave45]

Akula is separating the voltage and amperage, running the voltage through the leds and using the amperage to run the driver.
This is just an ignition coil and driver, notice the direction of the protection diode across the transistor.
The primary has a bemf that runs into the secondary this is the high voltage, the secondary also has a bemf, this runs through the protection diode, its direction through the diode is an indication of its polarity............. its neg.

[verpies]

Akula is separating the voltage and amperage, running the voltage through the leds and using the amperage to run the driver.

That's ridiculous.
LEDs will not light without current flowing through them.
Voltage and Current cannot be separated - they are two different sides of the same coin. The former is the cause and the latter is the effect.

P.S.
"BEMF" does not mean that the direction of current through an inductor reverses when a switch opens.
In fact, the electric current remains flowing in the same direction through inductor's winding.
See this simulation.

[a.king21]

That's ridiculous.
LEDs will not light without current flowing through them.
Voltage and Current cannot be separated - they are two different sides of the same coin. The former is the cause and the latter is the effect.

P.S.
"BEMF" does not mean that the direction of current through an inductor reverses when a switch opens.
In fact, the electric current remains flowing in the same direction through inductor's winding.
See this simulation.

I agree, moreover what's to stop the transistor from   being blown to smithereens.

[Dave45]

If you know it all then you should have a free energy device right 

5.2 Diode characteristics
The most important characteristics when using power diodes is the maximum current in the forward direction (IFmax), and maximum voltage in the reverse direction (URmax).

Thats ridiculous