51+DS1302+gsm源代码，相信对大家有点启发

1.利用PWM控制占空比实现LED的亮暗。 2.可以用UP DOWM键进行控制亮暗。 -1. The use of PWM duty cycle control to achieve the bright LED dark. 2. Can be used to control button UP DOWM bright dark.

STM32 USART IAP升级，包含IAP程序、APP程序-STM32 USART IAP upgrades, including the IAP program, APP program

一个实用的单片机显示液晶用汉字字模生成软件（非源码），非常实用，可生成C51或汇编格式。-a practical LCD MCU with Chinese characters Fonts generation software (FOSS), a very practical, or can be generated C51 compilation format.

这是一个C51做的GPS终端 CPU：89S52 语言： Keil C51 主要是RS232通信-This a C51 done GPS terminal CPU : 89S52 Language : Keil C51 is RS232 communication

简易正弦波三角波方波发生器 使用keil C51,12MHZ晶振,AT89C2051 -Simple sine wave square wave triangle wave generator using keil C51, 12MHZ crystal, AT89C2051

飞利浦的LPC2103的实验二：四位数码管动态显示0~F，分四次显示。编译环境为：keil3和proteus7，仿真通过。-Philips LPC2103 two experiments: dynamic display four digits 0 ~ F, four show. Compiler environment: keil3 and proteus7, through simulation.

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

77E516的双串口演示程序,同样适用于77E58.双串口最佳示例代码-77E516 dual serial Demonstration Program, the same applies to 77E58. Dual Serial best sample code

使用IA4421无线射频芯片传输数据，发送端通过串口每次发送多字节，接收端将接收到的数据显示在上位机上。-IA4421 chip using radio-frequency transmission of data through the serial port for each sender to send multi-byte, the receiver will receive the data displayed in the upper machine.

本程序是下个双通道充电器的原程序,充两节NI-MH电池,-This procedure is the next dual-channel charger for the original procedure, two rechargeable NI-MH battery,