定时器结合LED 7805开发板，适合初学者

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?

基于8051的单片机时钟源代码，可实现时间设置，闹钟等-Based on the 8051 single-chip clock source code, can be set-up time, alarm clock, etc.

51单片机学习最好的途径，每章节都有程序作附件-51 SCM best way to learn, each chapter has procedures in Annex

此源码利用单片机实现短距离无线传输，有实用性，-use of this source MCU short distance wireless transmission, practicality,

MSP430例子程序下载-MSP430 Example Program Download 111111111111111

12864液晶（STC7920控制器）屏上用基本指令与扩充指令分时显示文字、图片、图片与文字混合、任意位置的图片。-12864 LCD (STC7920 controller) to use on-screen instructions and the expansion of the basic time-sharing display text instructions, pictures, images and characters mixed, arbitrary location of the picture.

89c51usb仿真器原理图，超级棒，拿出来与大家分享-Schematic 89c51usb emulator, super rod, out to share with you

短信息相关单片机GSM短消息控件-short information related SCM GSM Short Message Control

STC单片机程序主要完成电压采集和AD过程-STC-voltage single-chip process is essentially completed the process of collection and AD

红外遥控解码数码管显示 直接将烧写进单片机芯片即可 -Infrared remote control decoding digital display single-chip directly into the chip can be burned