Motorized Correction Collar for Microscope Objective

Here are all the parts needed to motorize the correction collar of a microscope objective.
I have used an Arduino Nano, a potentiometer and an SG90 servomotor to control the correction collar value.
For more information, check this instructable: https://www.instructables.com/id/Motorized-Correction-Collar-for-Microscope-Objecti/