4x4矩阵键盘电子琴把“单片机系统”区域中的P1.0 端口用导线连接到“音频放大模块”区域中的SPK IN 端口上； （2． 把“单片机系统“区域中的P3....

单片机驱动1602，可在1602上显示字符串，简单易懂，适合初学者使用-MCU-driven 1602, 1602 can be displayed on a string, easy to understand for beginners

高速电路信号完整性问题，有一定的参考价值-Based on the Signal Integrality theory, the key problem met during signal processing module design and its solution is given

在有线电视中实现程控有源滤波器设计。为了充分利用设备和传输线,需要一种具有频率选择的网络―滤波器,将同一线 路上不同的信号分开,在电视机中也需要不同的滤波器(即选择有用信号,抑制无用信号) 。下面利用8051 单片机与12 位分辨率的DAC1208 数模转换芯片相结合的系统实现时间常数可程控有源滤波器设计,阐述了硬件结构与软件设计-In cable television in the realization of program-controlled active filter design. In order to make full use of equipment and transmission lines, the need for a frequency selective network- filter, the same lines separate different signal in the TV also requires a different filter (ie, choice of useful signals and suppress unwanted signals). Following the use of 8051 and 12-bit resolution digital-to-analog converter DAC1208 chip combining system time constant can be program-controlled active filter design, the hardware structure and software design

利用AT89C51单片机做的一个音乐卡,可以播放多首歌曲-AT89C51 single-chip microcomputer use to do a music card, can play more songs

AD0809 在51 单片机中的应用.pdf-AD0809 in 51 MCU. Pdf

PC机和智能型仪表通过RS485进行异步通信-PC and intelligent instrument for asynchronous communication through the RS485

直流电机测速程序 电机需带码盘 精度高 可直接设置转数 短时间内电机达到所设定的 速度-DC Motor Speed procedures required motor encoder with high precision can be set directly to a few short period of time to achieve the set motor speed

讲述了单片机要求的对齐原理 对结构体的理解非常重要-Tells the MCU requirements of the body alignment principles of the structure is very important to

直流电机速度测量与调节，通过设置不同的按钮来控制奠基的转速，而且显示在数码管上-DC motor speed measurement and regulation, by setting different buttons to control the ground-breaking speed, but also in the digital tube

一个用汇编编写的51单片机发声程序,内嵌一首简单歌曲"八月桂花香"。-Used to prepare a compilation of 51 single-chip voice procedures, embedded in a simple song