... Embedded microcontroller− Self pulse generation, automatic run on power-up− Speed control through on-board trimmer 0.15 - 1900 RPM ( ... /stop, direction, enable/shutdown− Automatic current reduction / power savingDescriptionUIM24302 stepper motor controller is a microprocessor embedded, voltage ... an analog voltage in three optional ways:1) the on-board trimmer, 2) an external potentiometer or, 3 ...