The standard ULN2003A darlington transistor array for the 28byj-48 stepper motor only uses 4 pins of the seven available on the ULN2003A can I use two ULN2003A to drive three stepper motors?
10pcs ULN2004 ULN2004AN Darlington NPN Transistor Array-7 50V 350 mA D – eElectronicParts