汽车上四车窗升降器：包括电路图与源程序，采用PIC芯片，C语言编写，具有点动及长按功能，并具有防夹功能-Four car windows hoist

能够实现使用51单片机驱动电机和蜂鸣器实现升旗的目的并且在国旗升上去的过程中计时-Will be able to realize the use of 51 single-chip microcomputer drive motor and buzzer to realize the purpose of hoist a flag and the flag rise up in the process of the timing