简易电子琴的设计 一、 设计题目： 设计一简易电子琴，要求能够发出1、2、3、4、5、6、7等七个音符。 使用元件：AT89C51、LM324，喇叭，按键等 二、 设计目的 （1）能够对电子电路、电子元器件、印制电路板等方面的知识有进一步的认识，独立对其进行测试与检查。 （2）熟悉8051单片机的内部结构和功能，合理使用其内部寄存器，能够完成相关软件编程设计工作。 （3）为实现预期功能，能够对系统进行快速的调试，并能够对出现的功能故障进行分析，及时修改相关软硬件。 （4）对软件编程、排错调试、焊接技术、相关仪器设备的使用技能等方面得到较全面的锻炼和提高。-simple design of a flower, a design : a simple flower design, request, sent seven notes. Use Element : AT89C51, LM324, speakers, such as two keys, designed (a) to be able to electronic circuits, electronic components, such as printed circuit boards with the knowledge to further understanding of its independent testing and inspection. (2) familiar with the 8051"s internal structure and function and the rational use of its internal registers can be completed software programming design work. (3) To achieve the desired functionality, the system can quickly debugging, and the right to function failure analysis, the timely revision of the related hardware and software. (4) The right software programming, debugg

基于MSP430的AD转换，可以加以修改成为单独模块应用。-MSP430 Based on the AD converter, you can modify the application of a separate module.

通过单片机控制0832芯片实现数模转换 输出波形-0832 through the single-chip microcomputer to control the number of chip-to-analog converter output waveform

关于单片机（51系列）通过GPRS模块（LT8030）和服务器进行通信-on SCM (51) via GPRS module (LT8030), and communications servers

典型PID算法程序，经实验，控制效果优，控制精度高。-It is a representative program of PID arithmetic.The effect of control is excellent and the precision of control is high via experiment.

c8051f340 silcon实验室

基于stc89c52实现具有校时模式、定时模式，能够显示月、日、星期等功能的电子钟。-When the realization of the school-based stc89c52 mode, timing mode, can display month, day, week, and other functions of the electronic clock.

一个红外解码的源程序~用来解码大多数的红外线遥控编码~-An infrared source ~ used to decode decoded most of the infrared remote control codes ~

DTMF编码芯片HT9200的51接口程序。输入参数R2表示发送数据个数，输入数据与发送数据与DTMF码的关系:00H-0 01H-1 02H-2 03H-3 04H-4 05H-5 06H-6 07H-7 08H-8 09H-9 0AH-A 0BH-B 0CH-C 0DH-D 0EH-* 0FH-#。详细说明参考文件内-DTMF encoder chip HT9200 51 interface program. R2 said input parameters to send data distribution, data entry and send data with the DTMF code : 00H-0 01H- 02H-2 Mr- 3 in the 04H-4 05H-5 06H-6 07H-7 08H-8 7-9 0AH-A 0BH- 0CH B-C 0DH-D 0EH-* 0FH-#. Detailed information paper

C51单片机中文介绍-C51 microcontroller introduce Chinese