单片机控制，能完成小车自动循迹（黑色路径）、避障等功能。-The paper based on single chip microcomputer STC89C52 application, through C programming language, makes the car have followed the trace, obstacle avoidance, orbiting objects, and other functions.

stc89c52单片机使用双色点阵模拟流动广告的效果，使用Ｃ语言开发。-The use of two-color dot matrix analog mobile advertising effectiveness

本设计采用单片机STC89C52为核心器件来设计秒表，系统实用性强、操作简单。秒表由1个4位一体共阴数码管来显示时间，显示时间为00.00~99.99秒，每秒自动加1。一个按钮实现启动/暂停功能，另一个按钮实现复位功能。按下启动/暂停键则开始计时，再按一下启动/暂停键则暂停，显示当前计时的秒数，按下复位按钮则复位，显示数值为00.00。-This design USES the microcontroller STC89C52 as the core device to design a sto

STC89C52单片机与HC-06模块下位机，通过手机应用程序和单片机HC06 通信，测试通过！-Under STC89C52 MCU and module HC-06-bit machine, through mobile applications and microcontroller HC06 communications, test OK!

选用MQ2气体传感器对现场可燃性气体浓度进行检测，采用功能和性价比较高的STC89C52单片机作为中央处理单元，对浓度信号进行采集、数据处理、显示、报警及打开排气装置等工作。-Using mq2 gas sensor for the concentration of flammable gas field were detected by function and high ratio of performance to price STC89C52 microcontroller as the