Stepper Motor is a type of electromagnetic device which moves in discrete steps. 5 line 4 phase can be used for ordinary chip driver ULN2003, connect to phase 2, support development board, with convenient use, direct mooring, step motor with standard interface, when used directly pluggable. The stepper motor with a standard interface can be easily connected to the driver board, while the indicator has four phases A, B, C, D indicates the state of the step-by-step motor. This Unipolar Stepper Motor 28-BYJ48 is provided with five wires and four coils. The center connections of the coils are tied together and usually used as the power connection. Package Includes:5 x Stepper Motor; 5 x ULN2003AN Driver Board