Now to my instructions:
I used this shematic
Used fans exactly like these ones:
One is 80mm other is 120 mm standard pc fan:
My setup looks like this right now and works.
I marked wires with numbers 1-4 and also added numbers to first fan core poles to show where wires are connected.
Number 1 wire goes to the potentiometer.
Number 2 wire goes to the colector
Number 3 wire goes to the (-) output and (+) input
Number 4 wire goes to the emiter
The resistor that i added goes between wire (1) and potentiometer and his value is 560 Ohm
You may not need this resistor as you may have different potentiometer range but this setup works without this resistor.
If setup do not start when connecting power supply try set potentiometer to min value.
when you hear faint whining from cores than it's operational.
if someone knows how this circuit operates and what are the relation with second fan core and why this works in solid state please comment.
If someone have additional questions feel free to ask.