说明：  首先介绍的原理，然后通过实例介绍了单片机在现实生活当中的应用：如洗衣机，空调器，电冰箱，全功能电风扇，以及彩电，录音机等家电设备的应用。
(First introduces the principle, and then describes an instance among microcomputer in real-life applications: such as washing machines, air conditioners, refrigerators, full-function electric fan, as well as color television sets, tape recorders and other appliances equipment.)