ServoDatabase lists various different servo motors, and describes some as "analog" (e.g. SG90) and some as "digital" (SG92R).
"Digital" servo motors are apparently better (they seem to cost more, anyway).
I've read a number of sources that dismiss the label as "marketing". Even if there is an actual technical difference, what could I check in the devices' specifications sheets that would confirm that motors described as "digital" do indeed enjoy those technical advantages?
- What is the difference between "analog" and "digital" servos?
- What difference should this make to me when I am using them - can for example SG92R motors simply be treated as drop-in replacements for SG90 motors in the same sort of application?
- When I'm driving them (directly from the GPIO pins of a Raspberry Pi) should I treat them any differently - for example, if I have been using a 50Hz pulse to drive them, should I change this or any other parameters for a digital servo?
- Are digital servos more or less easily damaged (by excess load, electrical errors, etc) than analog servos?