This is the circuit I plan to implement to control a LED by a logic bit
The datasheet of the transistor can be found here
I used FET transistor as amplifier, so I know about the saturation zone that let you get a voltage gain. However, I never used fet as switch, therefore correct if I am wrong.
In that zone, the MOSFET behave as a variable resistance. So if I work in 3.3 logic, when I put 1 into the gate, The mosfet will behave as a 2-4 ohms resistance (from the datasheet), where the channel will let pass current up to 50 mA? When I put a 0 into the gate ( Vgs < Vth) , the mosfet will not conduct.