This is a version of a diy pocket dolly, driven by an adjustable 12V gear motor. The power comes from 8 AA rechargeable batteries, which are integrated into the controller. The dolly is pretty light and compact so that it fits in a backpack and can travel well.
There are two motors which you can replace within a minute.
1.Motor: Slow =24min / 1m(3,3ft), Fast=2min /1m(3,3ft)
2.Motor: Slow=2min / 1m(3,3ft), Fast=10sec/1m (3,3ft)
The slow motor is good for time-lapse recordings and macro slides the fast motor is good for everything else.
With the the fast motor still some problems because it transmits vibrations to the camera. The video was made solely with the slow motor. It works quite well.
The solution with the gearmotors is actually a compromise. It is better to take a stepper motor, but it is a bit more complicated.
The slot in the aluminum was made with a normal router (if you want to imitate that, please protect your eyes).
A few more detailed information: