Using AT89S52 realize phase function, optical encoder used to encode the output.

MODBUS通信协议MODBUS源代码最初是MODICON为自己生产的PLC（可编程逻辑控制器）协议而开发的，后来广泛应用于工业部门，这是一对多的通信方式，他的方式是免费开放的，任何人都可以开发，这么多的PLC，人机界面和控制软件有支持方案。

好久没来了,写个4*4键盘的程序把,基本上每行都有解释,很适合初学者-Long time did not come, write a 4* 4 keyboard procedure to basically have to explain each line, it is suitable for beginners

485端口抄表程序，通过485端口进行电表抄写-485-port meter-reading program, through the 485 meter port copying

3972源程序 3972源程序-3972 source 3972 source code

DIY多功能转换器（已调试通过）。 本原理图可以实现USB/RS232、USB/RS422、USB/RS485接口转换功能。只需安装USB驱动程序即可实现USB转串口的功能，简单方便。另外只需对电路图稍作改动即可实现RS232/RS422或RS232/RS485转换功能。 心动了吗？不如赶快行动，拥有属于自己的五合一的接口转换器吧！-DIY Multi-function Converter (has debug through). The schematic diagram can be achieved USB/RS232, USB/RS422, USB/RS485 interface conversion. Simply install the USB driver can achieve the function of USB to serial, easy and convenient. Also just to make a minor amendment to the circuit can be realized RS232/RS422 or RS232/RS485 conversion. Echocardiography it? Action as soon as possible, with their own-one interface converter吧!

用61位单片机与C程序实现语音复读功能！-With 61 single-chip microcomputer with C program features voice repetition!

nec16位单片机读U盘播放MP3源码，接口芯片采用CH375，解码芯片MA8201。-Reading nec16-bit single-chip U disk MP3 player source code, interface chip CH375, decoder chip MA8201.

MSP430F2274 单片机C程序调试代码-MSP430F2274 Singlechip C program debugging code

Cygnal的F020采集电压信号送到液晶显示程序，经测试可用。-Cygnal

介绍了液晶显示模块基本原理及其技术特性，与单片机的进行接口的具体电路，同时给出了其编程方法和程序代码．-Introduced the basic principles of liquid crystal display module and its technical characteristics, and MCU interface to the specific circuit, at the same time gives the methods and procedures of its programming code.