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利用ＰＣ机并行打印机接口制成外接式Ｄ／Ａ板，可完成８位数／模转换，适用性强，电路简单；可用汇编或高级语言编程。文中附有原理图及Ｃ语言程序。
Use of PC parallel printer interface made of external D / A board to complete the 8-bit / mode conversion, applicability, simple circuit; available assembly or high-level language programming. Text attached to the schematic and C language program.