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用来做键盘和显示的芯片7279的源代码，用C编的-Used to make the keyboard and display the source code of 7279 chips, with C-series

凌阳单片机实现时钟并语音报时的源代码 很有趣 当毕业设计不错

实验箱上的蜂鸣器发出对应的音调（中音），当同时按下L和1-7时是，蜂鸣器发出低音，同时按下H和1-7时，蜂鸣器发高音。只要按键没松开，蜂鸣器一直发声，直到松到按键。-The buzzer sounded on the test box corresponding to tone (Tenor), when at the same time when you press the L and 1-7, the buzzer sounded a bass, while pressing the H, and 1-7 when the buzzer made treble. As long as no release button, buzzer sound has always been, until the pine to the button.

MSP430F149单片机控制122*32液晶C程序-MSP430F149 single-chip control 122* 32 LCD C procedures

AVR开发例程 有多种设计样例 帮你快速掌控AVR-AVR development has a variety of routines designed to help you sample the rapid control of AVR

单片机atmega16内部模数转换程序，功能：通过调节ADC0、ADC1两个电位器来改变输入电压，并在数码管同时显示两路电压值。-SCM atmega16 internal analog-digital conversion procedure, function: by adjusting the ADC0, ADC1 two potentiometers to change the input voltage, and also showed two-way digital control voltage value.

在做项目（工程）的时候，我们经常要用到比较多的按键，而且IO 资源紧张， 于是我们就想方设法地在别的模块中节省IO 口，好不容易挤出一两个IO 口，却 发现仍然不够用，实在没办法了就添加一个IC 来扫键。一个IC 虽然价格不高， 但对于大批量生产而且产品利润低的厂家来说，这是一笔不菲的开支! 那，我们能不能想到比较好的扫键方法：用最少的IO 口，扫最多的键？可以吗？-Doing the project (engineering), we often use the relatively large number of keys, and the IO resource constraints, so we are trying to save in another module IO ports, finally out of one or two IO ports, only to find is still not enough there is really no other way to add an IC to sweep on the keys. Although the price of an IC is not high, but low profits, high-volume production and product manufacturers, this is spending a lot of money! That, we can not think of a better scan key method: with a minimum of IO ports, scan Most of the keys? OK?

conver hull prgram dds

用AT89S51单片机实现LCD1602显示数字时钟功能，通过按键能调节时分秒、年月日星期。Keil C51开发环境-AT89S51 MCU LCD1602 display with digital clock function, through the buttons can be conditioned every minute, day of week. Keil C51 Development Environment

C51汇编必做试验3 -- 键盘扫描（C51最常见的应用哦）-ASM exam3-- Scan KeyBoard.