It fits a large variety of servos and brands. For the 9g micro servos called SG90, I learned that there exist at least two different sizes of the servo head. A Tower Pro SG90 servo has a smaller ...
This library was tested with an ATTiny85 via a usb programmer on an Arduino IDE with the Tower Pro Micro Servo 9g (an SG90 servo). The servos positive power should first go through a voltage regulator ...