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

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89c52编写智能化开关电源设计，带A/D,D/A识别全数字开关电源程序。-89c52 prepare intelligent switching power supply design, with A/D, D/A to identify an all-digital switching power supply procedures.

c 51编程的一个教训，抛出一个范例是为了然大家吸取教训。-programming a lesson dished out an example to everyone ran to learn.

开票盖章系统设计开发环境为ICC,可以编译成汇编,直接下栽到嵌入式avr单片机进行控制-drawer sealing systems design and development environment for the ICC, can compile a compendium, Embedded directly to the downward avr microprocessor control

基于MPX4105的数字气压计，用单片机控制，希望大家喜欢！-MPX4105 figures based on the barometer, using single-chip control, I hope everyone likes!

32位 RFID 开发板,支持多种13.56M卡.-32 RFID development board to support a variety of 13.56M card.

随着精准农业的发展，农业种植和农业研究人员需要一种手持式NDVI测量仪，以便对农作物长势进行定量测量。本文讨论了一种手持式NDVI测量仪的完整设计过程，详细论述了设计原理，并给出了详尽的单片机程序、设计电路原理图及PCB图。该NDVI测量仪采用太阳光作为光源，光电探测器采用滤光片和光敏二极管实现，用AT89C51单片机控制。其具有结构简单、成本低、轻便、低功耗的特点。-With the development of precision agriculture and farming, and agricultural researchers need a handheld NDVI measuring instrument, in order to crop growth for quantitative measurement. This paper discusses a handheld meter NDVI the integrity of the design process, discussed in detail the design principles, and gives a detailed SCM procedures, circuit schematics and PCB plans. The NDVI measuring instrument used sunlight as a light source, photodetector using filters and photodiode realized, with AT89C51 control. Its structure is simple, low cost, lightweight, low-power characteristics.

用C8051F310的定时器来实现定时中断，进而实现在扬声器实现不同声音的输出-C8051F310 timer used to achieve regularly interrupted, and then realize the sound at different speaker output

打印机控制程序，用89c52单片机控制打印，已测试通过-printer control procedures, 89C52 microcontroller with print control, have been tested

是用AT89C2051主控音量控制PT2258,数码管显示, 红外线遥控,2.1/5.1音源选择)包括全套原理图,源程序,HEX文件-AT89C2051 is PT2258 master volume control, digital control, infra-red remote control, 2.1/5.1 sources choice), including a full set of schematics, source, the HEX file