C51实用源码，极具参考价值！

单片机和电脑串口通讯，这个是电脑向单片机发送数据。-Single-chip and computer serial communications, this is a single-chip computer to send data.

使用protel99软件编辑的原理电路图，希望对各位有助于电路图的学习和开发-The use of the principle of circuit protel99 software editor, in the hope you will help the study and development of circuit

数码管设计软件！可以自动生成数码管的编码！支持MCS-51，PIC，AVR，能生成共阳的或共阴的编码，可以是汇编格式和C语言格式！-Digital control design software! The digital control can automatically generate the code! Support for MCS-51, PIC, AVR, can generate a total of yin-yang, or a total coding, which can be compiled format and C language format!

S3C2440 arm9芯片上RTC的测试程序，可以测试RTC是否正确运行，以及能对RTC进行时间设置。-RTC chip S3C2440 arm9 test procedures to test whether the RTC correctly, and be able to set the RTC time.

128的串口调试程序，使用的是查询发送和查询接收 很好用的一个驱动-128 serial debugger, using a query to send and receive queries with a very good driver

电压测试，数字电压表，利用动态显示模块显示-Voltage testing, digital voltmeter, using dynamic display module display

周立功DP51+试验板程序-weeks meritorious DP51 plate test procedures

Keil工程建立及设置-Keil establishment and the provision of engineering

一种比较好用得PWM控制芯片，希望对您有所帮助。-Was a relatively easy to use PWM control chip, want to help you.