利用51单片机控制1602读写，方便易懂实用

主要功能：利用AT89C/S51作为控制器，JM12864M型号的lcd作为人机界面，18B20温度传感器和DS12887时钟芯片为辅助IC的可调万年历系统。此万年历可以形象的表现出系统当前的状况，并能随意设置闹铃和时间，具有保存和不保存的当前设置的功能。-Main functions: the use of AT89C/S51 as a controller, JM12864M models of lcd as a man-machine interface, 18B20 temperature sensors and DS12887 Clock IC chip for auxiliary adjustable calendar system. This calendar can show the image of the system

支持SD卡的MP3电路图,powerpcb4.0格式.使用AVR单片机-support the SD card MP3 circuit diagrams powerpcb4.0 format. Use AVR

单片机简易频率计。包含有Proteus仿真程序-Simple single-chip frequency counter. Proteus simulation program contains

VHDL编写的八位9值信号的中值输出方法，特点是不采用流水或状态机设计，因此速度较快-VHDL prepared by eight of the nine value signal output value method, which is characterized by not using water or state machine design, therefore faster

AVR单片机的源代码，VHDL代码。实现了AVR单片机的功能。-AVR microcontroller source code, VHDL code. AVR microcontroller implements the function.

这个源代码是关于MCS-51的无线接收，用89S52控制MT8870B进行DTMF解码。程序相当的经典，本人调试了几周后，达到了非常好的效果。误码率相当的小。我觉得好东西要大家分享的，所以今天我上传此代码，与大家共同分析进步。-the source code is on the MCS-51 wireless receiver, S52 control with 89 MT8870B for DTMF decoder. Quite the classic procedure, I debug a few weeks later, to achieve very good results. The error rate is very small. I think that good things should be shared, so I upload this code, and the analysis of common progress.

无线传感器节点源代码，采用ATMEGA128控制CC1000.-The source code for wireless sensor nodes, using ATMEGA128 control of CC1000.

数控直流电源，步进０．１，０－１５Ｖ掉电存储-CNC DC Power Supply, 0.1,0-15V Step-down storage

通讯误码仪测试软件-communications software error Test

CPU卡读写，符合7816标准。经测试完全可以使用。-CPU card reader, in line with the 7816 standards. Been tested and can be used.