I am using the Pololu Micro Serial Servo Controller connected to an Arduino and multiple other servos (4 total) to make a robot arm. Two of the four servos require 4-6 volts, while the other 2 require 7-10 volts, so I am planning on powering all the servos separate from the Pololu.
I have the Arduino and Pololu connecting to each other correctly (flashing green led), but the servo(s) don't move when plugged in to the control pins. All the servos work correctly when plugged into a servo-tester.
I think that this problem could be fixed by connecting the grounds of the servos to the ground of the Pololu, but would like advice because I am not sure if it will work, or will end up frying one of the parts (We already fried a pololu).
Would connecting the grounds of the batteries to the ground of the Pololu help, or damage the parts?
, but I couldn't figure out how to show the micro serial servo controller.