稳压监控系统。通过tlc549采集电压，单片机控制然后通过数码管显示，并传送到上位机界面显示。-Regulators monitoring system. Collected by tlc549 voltage, microprocessor control and then the digital display, and send to the host computer interface display.

通过15单片机控制74595芯片从而控制数码管显示数字，对管脚是一种极大的节约