Cebek R-61 module is a speed controller for DC motors. It will control electric motors from 9 to 15VDC with a maximum consumption of 2.0A. The speed and direction of motor is controlled via on-board potentiometer or via remotely wired potentiometer. The module operates at 100Hz frequency, LED indication of power on and protected by glass fuse.
A suitable external potentiometer can be between 10K & 47k, 10k Recommended, either a standard pot or a centre click pot (giving a positive centre off point)