用单片机蜂鸣器实现911报警声音，采用中断延迟实现输出频率的变换。...

状态1：正常时，8个LED发光二极管（彩灯）循环点亮。 • 状态2：有报警时，蜂鸣器发出报警声（用P3.3接一个按键，模拟产生报警信号。当开关合上，发生报警；当开关断开，报警停止。用P3.7输出音频信号驱动扬声器，作为报警信号），同时8个LED发光二极管（彩灯）闪烁。 P3.2接一个按键，用于消除报警-Status 1: normal, eight LED light-emitting diodes (lantern) light cycle.

帮助初学PIC单片几的人快速入门,同时也可以为有经验的工程师提供产考.-PIC chip to help beginners a few people get started quickly, but also for experienced engineers to provide production test.

单片机实现接收从电脑发送过来的字符串的方法-Achieve single-chip computer to receive from the string sent Ways

1602液晶的驱动程序，调用其中的函数即可对其命令和数据完全操作！-1602 LCD driver, call a function which can be ordered and its data fully operational!

比较经典的独立键盘及时扫描方法。51单片机中运行-Comparison of classic and timely independent keyboard scanning method. 51 Single-chip running

内容： 1、试验目的：了解按键的扫描原理 2、实现现象：同时按键抢答，先按的键有效，其他按键锁死 复位后重新开始抢答 3、硬件要求：按键 LED灯 原理：最先按下按键者有效，其他均无效-Contents: 1, test Objective: To understand the key principles of scanning two to achieve phenomenon: the key to answer in the same time, press the key and effective, other key-lock reset and re-start to answer in 3, the hardware requirements: button LED lights principle: first press the keys are valid, others are null and void

里面有很多单片机的代码,对初学者有一定的帮助-there are many SCM code for beginners will help

采用Maxim公司的Max267芯片实现的滤波电路 欢迎下载-using Maxim"s Max267 chip welcome the filter circuit download

LCD320240,C51单片机的串口接收练习。-LCD320240, C51 microcontroller" s serial port to receive practice.

八段数码管显示实验（Keil），这在德国的单片机软件上可以运行。-It shows experiment (Keil digital tube), which in German single-chip microcomputer software can run.