基于80x86实验箱平台设计并制作数控直流电源。要求由键盘预置输入直流电压在0～＋9.9V之间的任意一个值，数控直流电源输出，且输出电压与给定值偏差不大于0.1V。-80x86 box platform based on the experimental design and production of digital DC power supply. Request input from the keyboard preset DC voltage between 0 ~+9.9 V a va