本源码是基于51单片机的一个USB电源控制器，可根据用户设定的时间自动关断USB电源，程序里包括按键扫描模块、4位数码管驱动模块、mos管驱动模块、定时模块等。由一定的学习和研究价值。-The source is based on 51 single-chip controller, a USB power supply, according to the user to set the time automatically turn off USB power, the program to include key scan module, 4 digital driver module, mos tube driver module, timing module. By a certain amount of study and research value.