Your Dob will still have the same Alt-Az movement but the whole thing will ride on a platform that is tilted and has a large sector underneath and a pivot point. The arc length of the sector determines maximum duration before having to be reset. Usually 45 min or so. The angle of the sector is custom made for your latitude (with a bit of leeway). Stepper motors drive the sector.
You still have typical Dob movement but it all rides on a platform that tracks the sky for approx 45min. The platform itself needs to point north-south and be level with the sector on the side of the celestial pole that is above the horizon, I.e. south for Southern Hemisphere. It adds about 15cm to the height of the Dob.
If you’re handy with wood you can build a platform but also need a little bit of electronics to drive the stepper motors.
Here are two links at both ends of the price spectrum:
https://www.oreilly.com/library/view...4/ch04s21.html
http://www.equatorialplatforms.com/
There are many others. Also search for plans and kits.