IRF540 is N power MOSFET, so connection is good (at least it works in PC simulation).
The point is i do not want to turn on MOSFET fullyt - to use it in linear mode.
receiver IC originaly was supplied with 6V,
old battery had two outputs (6V and 8V) - 6V for receiver and servo motor, 6V and 8V for old small motor (low and high speed).
now i have Speed 400 motor (6V) and it runs normaly from 3cell battery (3.6V) in motor datasheet 3V is minimum.
But worst thing i found out - MOSFET in linear mode behaves as resistor - so it is the same as connecting resistor in series with motor - wasting energy
or am i wrong?
hmmmz, i will start desinging controller with PWM
i know alreadey how to controll duty cycle of 555 timer, H-bridge.
(at this time i do not want programable IC for full control of it)
is it possible to add start-soft-ramp for PWM generated with 555?