单片机程序举例，很好的程序。欢迎下载，液晶显示，万年历，计算器，电子琴，英文输入原程序及电路图-Single-chip process, for example, a very good procedure. Welcome to download, liquid crystal display, calendar, calculator, electronic organ, the original procedures and English input circuit

单片机程序举例，很好的程序。液晶显示，万年历，计算器，电子琴，英文输入原程序及电路图-Single-chip process, for example, a very good procedure. Liquid crystal display, calendar, calculator, electronic organ, the original procedures and English input circuit

基于AT89C51单片机计算器数字输入显示模拟设计 第一次按下时，显示“D1”；第二次按下时，显示“D1D2”；第三按下时，显示“D1D2D3”，8个全显示完毕，再按下按键下时，给出“嘀”提示音。-Based on AT89C51 microcontroller digital input display analog calculator designed for the first time, when pressed to show " D1" second time,