51单片机矩阵键盘的设计与调试，建议使用52单片机。

振中掌机程序符合645规约，用的是电力97规约，支持多费率，功能齐全-Vibration in the PSP process in line with 645 of the Statute

八路抢答器，有计时功能，计分功能当有选手抢答时可以显示台号-Octal Responder, with time-keeping. Scoring function

程序的源码及电路图都含其中，希望能对单片机开发者有用-Procedures have included source code and circuit diagrams in which the hope of useful single-chip developer

基于51单片机的CA1602A液晶显示,串行传输,键盘编码等源代码-Based on MCU 51 CA1602A liquid crystal display, serial transmission, the keyboard coding source code

一个小键盘程序，有9个按键，通过422控制其他东西。这个设计难度主要是控制成本。-A small keyboard program, there are nine buttons, through the 422 control other things. This difficulty is mainly designed to control costs.

顶尖电子称PS-15E电子称传称设置，一个很好的演示操作文档-Top E-called PS-15E electronic Chuan said that setting, a good demonstration of operation of the document

232同485转换的pcb图，有需要的只要稍加修改一下就可以了-232 with 485 conversion pcb diagram, there is a need for as long as a little tinkering can be a

[文件名] Touch.c [功 能] 8051单片机驱动ADS7846/ADS7843芯片 [简 介] ADS7846/7843芯片 适合用在4线制触摸屏，它通过标准SPI协议和CPU通信，操作简单，精度高，当触摸屏被按下时（即有触摸事件发生）则ADS7846向CPU发中断请求，CPU接到请求后，应延时一下再响应其请求，目的是为了消除抖动使得采样更准确。如果一次采样不准确，可以尝试多次采样取最后一次结果为准，目的也是为了消除抖动。-Driver source code of touch-sensitive screen with ADS7846/7843

AD9850 DDS控制子程序 经常做其他的单片机实验，还没做过DDS的实验。最近打算写个程序试验一下。 -AD9850 DDS control subroutine Singlechip often to do other experiments, not yet done DDS experiment. The recent plan to write a program to test.

AT45D041大容量IC卡 读写程序,不知现在还有没人用，以前我用过的一颗芯片。-AT45D041 large-capacity IC card reading and writing process, I wonder if there is no one now, and I used a single chip.