Short Message gsm alarm procedures, and hardware with complete switch input, sho...

硬件描述语言，对学习EDA的人，特别是初学者都有很大的参考价值。-hardware description language, to learn the EDA people, especially beginners have great reference value.

RS-485接口具有较强的抗干扰性，数据传输的距离较远，在一些应用中常常需要把RS-232标准的信号转换为RS-485的标准信号进传输。图中所示电路允许数据在RS-232/RS-485这两个不兼容的串行数据接口间传递。传输速度为480波特时，传输距离可达1750米。图中双RS-232收发器IC1将主机(PC)输出的RS-232电平转换为TTL电平，驱动高速RS-485收发器IC2 的输入，倒相器使IC2、IC3在受到起始位时被激活。-RS-485 trying to lay all the thoroughly bleed at the nose picking up the birthday 扰 fern cavity 强 ， Chu Huai basin cavity beat escapement for the birthday candle远Now ， Which instance, using Beckmannia中

个人做的基于AVR单片机的一个简易数字钟，用C语言写的，希望各位多多指教。-Individual to do a simple microcontroller-based AVR digital clock, using C language to write, and hope that the exhibitions.

基于AVR128单片机的电子时钟程序，包括时间设定，闹钟设定等功能，使用液晶显示-AVR128-based single-chip electronic clock procedures, including time settings, alarm settings and other functions, the use of liquid crystal display

这个是一款LCD驱动芯片的源程序，LCD1621使用广泛，可以供大家参考讨论-This is a LCD driver chip of the source, LCD1621 widely used for your reference discussion

51系列单片机的串口测试源码，经过项目验证可以直接放心使用，用c写成-51 Series MCU serial testing source, after the project can be directly verified to worry about, written with c

KeilC51 下作的8*8LED显示程序。更改delay()时间和tab*表中的值，可以显示不同的图形-KeilC51 under the 8* 8LED display program. Change the delay () time and tab* in the table values, you can display different graphics

Keilc51和proteus环境下实现的0－50MHz的频率计。-Proteus Keilc51 and realize the circumstances of the 0-50MHz frequency meter.

获取Sd卡ID，仅限参考，谢谢合作，也有不足之处请指正-Access to Sd card ID, only a reference, Thank you for your cooperation, but also the inadequacies please correct me

用ARM 开发板写的程序 12864的显示程序 请声明版权 不负责后果-ARM development boards with written procedures for the 12,864 procedures please indicate copyright statement is not responsible for the consequences