Stepper motor drive circuit schematic

This figure is a schematic diagram of the stepper motor drive circuit. The drive circuit constitutes a relatively large number of drive circuits through the ULN2803, and the circuit diagram is as shown. The P1.0~P1.3 output pulse of the single chip microcomputer is sent to the 1B~4B port of the ULN2803, and is output from the 1C~4C port to the A, B, C, and D phases of the motor respectively after the signal is amplified.
Figure stepper motor drive circuit schematic