Cara menentukan nilai resistor pada basis transistor┃apa itu hfe

@Radal05 How to determine the resistor value on a transistor base┃what is a transistor's hfe? 00:00 Radal05 00:11 Testing the use of the base R value on motor speed 01:44 Transistor base resistor value 03:00 Transistor hfe test 04:16 Basic transistor schematic