This book is a national planning textbook for vocational education during the 14th Five Year Plan period, and also a textbook for vocational education in Liaoning Province during the 14th Five Year Plan period. This book consists of 7 projects, including the basic knowledge of 51 series single-chip microcomputer (AT89S51), the use and circuit simulation of single-chip microcomputer compilation software, the production of circular colored lights controlled by single-chip microcomputer, the design and production of a simple serial digital display and stopwatch, the application of timing/counterdesign of traffic signal lights control system, the application of single-chip microcomputer interrupt control, and the application of single-chip microcomputer serial port-dual computer communication of single-chip microcomputer.This book can serve as a textbook for equipment manufacturing, electronic information and other related majors in higher vocational education, as well as a reference for e
