If your scope will remain on an alt-az dob mount, your choices are limited to either placing the entire scope on an equatorial platform, or adding a GOTO system with servo controls.
Each have their advantages and disadvantages. Constructing such a platform--which must be done for a given latitude (although a range of adjustment could be integrated) is not a trivial matter for a DIYer without moderate to advanced woodworking or or machining skills, but many of us have succeeded including myself. The platform should have the polar axis pass close to the center of gravity of your scope to minimize torque on the driving motors, so it is best designed for both a particular scope and a latitude. A purchased platform designed for your particular scope and location is a cinch to employ, however, since you would simply place your scope on top of it and align to the celestial north pole. No actual change would have to made to your scope. Being an actual equatorial mount, albeit one that can run for only about an hour before being reset, eliminates field rotation and can make astrophotography possible.
Adding a GOTO system with drive motors and controls varies in complexity depending on whether you develop an entire system on your own, or use an existing system. Others may advise you better on these possibilities.
EDIT-- I see that Jon posted as I was replying to your opening post. Yeah....what he said.
Edited by jtsenghas, 11 January 2017 - 10:43 AM.