Arduino sketch to operate a NEMA17 with DRV8825 and 28BYJ-48 with ULN2003 Stepper motor. This sketch can be used for both motor types. With a #define the motor type / driver is selected. // ***** ...

Uses an Arduino Nano, 70x40 0.42" I2C LCD, ACS712 Voltage Sensor (30A in my case), and a voltage sensor module. Voltage and current measurements were fine for my purposes but were still inaccurate ...