Voltage divider before the input of an LM324N used as a comparator
My servomotor has 3 pins: VCC (current comes from here), GND, and PWM.


This makes control very simple. Your servo has all the stuff needed to handle the relatively high motor currents.







simulate this circuit &ndash; Schematic created using CircuitLab

Figure 1. Direct connection between micro and servo unit.

Now you just need to figure out the PWM scheme your servo unit uses and write the code for that.