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Drive the unipolar stepper motor 28-BYJ48 that has 5 wires.
ULN2003 driver module is used for the purpose. It's also
possible to use the ULN2003 chip directly without the
dedicated module. There are different implementations in
this code for illustration:
0: Using Stepper library.
1: Half-wave drive from first principles.
2: Using third-party AccelStepper library.
3: With acceleration using AccelStepper library.