AT89C51SND1C a hard disk

多用途仪的温度控制，及与富士温控仪通讯。-Multi-purpose instrument for temperature control, and communications with the Fuji temperature controller.

自己使用AHDL语言编写的24位累加器.主要使用于DDS-24bit_acc

lpc23xx_24xx 程序包 及其有价值的 宝贝-lpc23xx_24xx packages and valuable treasure

在做项目（工程）的时候，我们经常要用到比较多的按键，而且IO 资源紧张， 于是我们就想方设法地在别的模块中节省IO 口，好不容易挤出一两个IO 口，却 发现仍然不够用，实在没办法了就添加一个IC 来扫键。一个IC 虽然价格不高， 但对于大批量生产而且产品利润低的厂家来说，这是一笔不菲的开支! 那，我们能不能想到比较好的扫键方法：用最少的IO 口，扫最多的键？可以吗？-Doing the project (engineering), we often use the relatively large number of keys, and the IO resource constraints, so we are trying to save in another module IO ports, finally out of one or two IO ports, only to find is still not enough there is really no other way to add an IC to sweep on the keys. Although the price of an IC is not high, but low profits, high-volume production and product manufacturers, this is spending a lot of money! That, we can not think of a better scan key method: with a minimum of IO ports, scan Most of the keys? OK?

不可多得的中文说明~~ 详细介绍了AD7714，费了很大的劲才找到的-Rare Chinese Description ~ ~ details on AD7714, costs a lot of劲才found

长沙理工自己的实验程序，从最基础的到高深一点的，都有。不过实验箱是我们学长自己设计的，其它的箱子要调试的话还需相应改动-Changsha Institute of Technology

这是控制变频器的西门子s7-200PLC程序-This is the control of Siemens frequency converter s7-200PLC procedures

LT_1B msp430开发板例子程序－Clock Out

基于51系列单片机以DS18B20为温度传感器的数字温度计，加入了时钟模块，用12864LCD显示-Based on 51 Series Single-chip temperature sensor to DS18B20 for digital thermometer, joined the clock module, with 12864LCD show

密码锁调试程序成功，只是不知什么原因，显示不正常-Lock