经典行列矩阵的密码锁~~~~~很多注解~~~很实用

主从报警系统，单片机编程，是电子课程设计做的东西-master alarm system, microcontroller programming, electronic design courses do things

51单片机矩阵键盘的设计与调试，建议使用52单片机。-51 Single-chip design of the keyboard matrix and debugging, it is recommended to use single-chip microcomputer 52.

网络端口到进程PID 的转换例子。可以显示本机运行的网络进程对应的端口号-network port to the conversion process PID example. Be able to show the machine running the process corresponding to the network port number

DDS 单片机控制AD7008 产生正弦波-AD7008 single-chip control of DDS generated sine wave

DTMF编码芯片HT9200的51接口程序。输入参数R2表示发送数据个数，输入数据与发送数据与DTMF码的关系:00H-0 01H-1 02H-2 03H-3 04H-4 05H-5 06H-6 07H-7 08H-8 09H-9 0AH-A 0BH-B 0CH-C 0DH-D 0EH-* 0FH-#。详细说明参考文件内-DTMF encoder chip HT9200 51 interface program. R2 said input parameters to send data distribution, data entry and send data with the DTMF code : 00H-0 01H- 02H-2 Mr- 3 in the 04H-4 05H-5 06H-6 07H-7 08H-8 7-9 0AH-A 0BH- 0CH B-C 0DH-D 0EH-* 0FH-#. Detailed information paper

2003年全国大学生电子设计竞赛试题。设计分为5个模块：前轮PWM驱动电路、后轮PWM驱动电路、轨迹探测模块、障碍物探测模块、光源探测模块。有完整的设计实现及报告说明-2003 National Undergraduate Electronic Design Contest questions. Design is divided into five modules : front-wheel drive PWM circuit, rear-wheel drive PWM circuit, track detection module, module detect obstructions, light detection module. A complete design and realization report

MSP430 IAR 汇编器用户指南.rar -MSP430 IAR 汇编器用户指南.rarMSP430 IAR 汇编器用户指南.rar

无线模块nrf2401驱动程序，介绍了NRF2401应用操作的源程序代码-Wireless module nRF2401 driver, introduced the application of the operation of nRF2401 source code

智能交通灯控制 实验做的 -Intelligent traffic lights control experiments make the

这是sd/mmc卡程序的第三部分，后面还有！-This is the sd/mmc card the third part of the procedure and there are!