Delphi上位机控制步进电机正反转，用单片机驱动，带有Keil工程文件-Delphi PC control of stepper motor reversing, with a microcontroller-driven, with the Keil project file

多路时间继电器单片机控制系统，很简单好操作-Multiple time relay microcontroller control system is very simple operating

《案例解说Delphi典型控制应用》配套光盘1，第1章基于单片机的控制应用-Case commentary Delphi typical control applications supporting Disc 1, Chapter 1, microcontroller-based control applications