HZK24，单片机编程必备，基于UCDOS的24点阵

帮朋友写的一个用MCS-51的IO口模拟PWM使外接LED亮度渐变的程序，虽然程序小，不过注释清楚，并已调试OK。-written for a friend with a MCS-51 simulation of the IO mouth so that external PWM LED brightness gradual process Although procedures for small, but clearly Notes, and debugging OK.

简易电子琴的设计 一、 设计题目： 设计一简易电子琴，要求能够发出1、2、3、4、5、6、7等七个音符。 使用元件：AT89C51、LM324，喇叭，按键等 二、 设计目的 （1）能够对电子电路、电子元器件、印制电路板等方面的知识有进一步的认识，独立对其进行测试与检查。 （2）熟悉8051单片机的内部结构和功能，合理使用其内部寄存器，能够完成相关软件编程设计工作。 （3）为实现预期功能，能够对系统进行快速的调试，并能够对出现的功能故障进行分析，及时修改相关软硬件。 （4）对软件编程、排错调试、焊接技术、相关仪器设备的使用技能等方面得到较全面的锻炼和提高。-simple design of a flower, a design : a simple flower design, request, sent seven notes. Use Element : AT89C51, LM324, speakers, such as two keys, designed (a) to be able to electronic circuits, electronic components, such as printed circuit boards with the knowledge to further understanding of its independent testing and inspection. (2) familiar with the 8051"s internal structure and function and the rational use of its internal registers can be completed software programming design work. (3) To achieve the desired functionality, the system can quickly debugging, and the right to function failure analysis, the timely revision of the related hardware and software. (4) The right software programming, debugg

这是原创的基于PIC16F877A单片机的读SD卡文件系统程序源代码-This is the original PIC16F877A microcontroller-based SD card file system read source code

单片机与ALTEC温控仪的通讯，设置温度。-Single-chip temperature controller with ALTEC communication, set the temperature.

文本模式模仿磁盘扫描外观 程序很简单,主要是把光标藏起来了,练习下文本模式下的作图.-Text-mode ScanDisk to imitate the appearance procedures are simple, the main is to hide the cursor, and practice under the text mode mapping.

用单片机的C语言实现的开机时间显示上次关机时间（存在看门狗里），还有显示当前时间。可供单片机程序开发人员参考。-MCU C language shows the uptime shutdown last time (there watchdog Lane), and show the current time. SCM procedures for the development of reference.

这是一个关于秒表倒计时的程序，写的很经典，拿来就可以用-It is a countdown on the stopwatch program, written in a very classic, brought can use

需要控制320*240的lcd的朋友可以看看，非常实用-Need to control 320* 240

dds中文资料，从原理入手，交你如何去设计dds。-dds Chinese information, starting from the principle of paying you how to design dds.

利用8051单片机驱动蜂鸣器，实现音乐发声功能。-8051 drivers to use buzzers realize music vocal function.