间歇开关程序，可通过按键设定工作/停止时间，来控制被控对象的工作，还可以通过按键在工作与停止之间转换。程序开发环境：Keil3，仿真环境：Proteus7.2。-Intermittent switching process can be set through the buttons work/stop time, to control the work of the object, but also can work with the stop button to switch between. Program development environment: Keil3, simulation environment: Proteus7.2.