日前不少进口微型计算机大部分均采用110V交流电源供电,而我国的交流电源均为220V,为适应我国电网供电要求,一般普遍的作法是外加一个220V变110V的电源变压器。这样不仅成本增高,而使用也不太方便。为此,笔者通过试验用几只常用的电子元件,便可以使微机直接用于220V电网正常工作。而且成本低廉,简单易做,无需调试便可以长时间的工作。进口PC主机均采用开关电源供电,此机的电源输入部分普遍 Recently, a large number of imported mini computers are powered by 110V AC power supply. However, AC power supply in China is 220V. In order to meet the power supply requirements of China’s power grid, it is generally accepted that a 110V power transformer with 220V power supply is added. This not only increased costs, but also not easy to use. To this end, the author passed the test with a few commonly used electronic components, you can make the computer directly for 220V power grid to work properly. And low cost, easy to do, you can work long hours without debugging. Imported PC host switching power supply are used, the machine’s power input part of the common