蜂鸣器响 改变蜂鸣器的频率，通过改变延时时间 蜂鸣器的时间要是是靠延时来完成的...

8051设计延时程序说明。-8051 design description of the procedures.

because I can not get the download rights, so I uoload this file.This is a wash program, include a caculation of prograss for me, -because I can not get the download rights, so I uoload this file.This is a wash program, include a caculation of prograss for me,

SPI使用范例，SPI和AVR单片机的通信和DS1302的通信-SPI usage examples, SPI and AVR microcontroller communication and DS1302 communication

转速测定，用于测定回转体的转速，测试完成后通过串行接口完成发送，使其它器件显示此信息。-Speed measured for the determination of rotary speed, the test is completed be completed via the serial interface to send, so that other devices to display this information.

此文件是在ＤＯＳ环境下对交通信号灯进行的设计，完成了红黄绿灯的相互转换．-this document is in the DOS environment for the traffic signal design, the red and yellow green to complete the conversion.

玩具故事公仔原代码,能够将故事,是小朋友的好伙伴,已经量产-Toy story doll original code, can be the story of a child a good partner, has been in volume production

用PIC单片机PIC16F877A带键盘设置的秒计时器-Sec timer.Sec timer.Sec timer

12232的驱动程序，驱动液晶YLF12232F-12,232 drivers, drivers LCD YLF12232F

本设计介绍了bh17无线耳机的制作方案，包括整体设计思路，以及电路图等。-The design introduced the wireless headset bh17 production programs, including the overall design concept, as well as circuit diagrams, etc..

Electronicworkbench5.1，非常简单的电路分析软件，对电路分析、模拟电路等课程的简单电路进行方针，验证计算结果。-Electronicworkbench5.1