Protues仿真的一个数码管电路.用了ULN2003和373.只能是一个基本电路.供学习.-Protues simulation of a digital control circuit. ULN2003 and 373 used. Can only be a basic circuit. For learning.

步进机的驱动程序，用的芯片是ULN2003-Stepper driver chip is used ULN2003

步进电机的C程序，已调试完毕，驱动是uln2003，正反转的-Stepper motor of the C program, debugging has been completed, the driver is uln2003 Reversible