Excelity&reg; DC 5V 4-Phase 5-Wire Arduino Stepper Step Motor with ULN2003 Driver Test Module Board 5 lines and 4 phases can be driven by ordinary uln2003 chip; can also be connected in phase 2 development board. Supporting the use of a direct plug and easy to use stepper motor used in the development board. ULN2003 stepper motor driver board A, B, C, D four-phase LED indicates the status of the stepper motor work. Stepper motor with a standard interface, when used directly pluggable.