实验以STC89C52单片机为核心构成单片机应用系统。系统主要有单片机、电压采集和显示电路三部分组成。单片机用于控制和传输数据，TLC1543完成电压采集功能并将模拟量转化为数字量。以HD7279A为主体的显示电路用于实现数据的显示。-Experiment STC89C52 microcontroller core constitute a single-chip applications. Systems are single-chip, voltage acquisition and display circuit consists of three parts. Microcontroller for control and data transfer, TLC1543 complete collection function and the analog voltage into digital. To HD7279A as the main display circuit for data display.