Profile: Eggert Electronics Engineering specializes in the design and manufacture of stepper motor control interface circuit boards. Our SSC3 system utilizes the SSC3 stepper motor control interface circuit board controls up to three 4-phase unipolar stepper motors in full step or half step mode. Our SSC1B interface circuit board can control one 2-phase bipolar or 4-phase unipolar stepper motor in full step, half step, quarter step or eighth step modes.