一般单片机编程器都需要5伏和12伏两种电源，12伏电源是Flash烧写用的。5伏电源可以直接从USB接口取得，12伏电源则可以用MC34063来制作，输入5伏，输出12伏。电路简单，无需调试，稳定性也好。我自制的编程器就用的这种方法，效果很好-Single-chip programmer generally need 5 volt and 12 volt power of two, 12-volt power supply is used by Flash programmer. 5 V power supply can be obtained directly from the USB interface, 12-volt power supply can be used to produce MC34063, enter 5-volt, 12 volt output. Circuit is simple, no need to debug, or stability. I made the programmer to use this method, the effect of good