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设计一个十字路口交通信号灯，基本配置包括四个方向共组（红灯，黄灯，绿灯）‘还可以包括转弯灯（适用于单向三股以上车道），行人过马路信号灯（红灯，绿灯）。(Design a traffic signal lamp at the crossroads. The basic configuration includes four directions: the red light, the yellow light and the green light. It can also include turning lights (for one-way three shares or more lanes), pedestrians crossing the street signal lights (red lights, green lights).)

giai ma DTMF bat so dien thoai goi den bang ic chuyen dung.

利用51单片机驱动ADC0809，实现对滑动变阻器的位置读取。(51 Microprocessor ADC0809, read the position of the sliding rheostat.)

msp430f149的电器原理图，学习该单片机的必备资料(msp430f149 electrical schematics, learn essential information on the microcontroller)

STC单片机实现0.96OLED SPI接口驱动，方便初学者(STC MCU realizes 0.96OLED SPI interface driver, which is convenient for beginners.)

这是一个基于msp430的超低功耗数字直流电压表(Digital voltmeter based on MSP430)

nRF24L01点对点跳频技术应用,关于射频2.4G无线通信的应用(nRF24L01 point hopping technology applications)

基于C51单片机proteus仿真的音乐播放器，可以播放多首歌曲以及基本的播放器按键功能。(C51 MCU proteus simulation based music player that can play multiple songs, and basic player key functions.)

51单片机运用PCF8591实现数模莫属转换（i2c协议） 1利用PCF8591 串行A/D 转换器转换电位器输入模拟电压，并在LED数码管上显示电压值（精确到2 位小数），实现数字电压表功能。 2在基本部分基础上，利用 PCF8591 的D/A 通道实现一个固定频率的方波（频率范围10~50Hz），并在虚拟示波器上输出。(51 MCU using PCF8591 to realize the digital to analog conversion (I2C) is 1 using PCF8591 serial A/D converter to convert the input analog voltage potentiometer, and in the digital tube LED display voltage values (accurate to 2 decimal places), the realization of digital voltage meter function. 2 in the basic part of basis, the realization of a fixed frequency Fang Bo using D/A channel PCF8591 (10~50Hz frequency range), and the output in a virtual oscilloscope.)

通过反转法循环扫描矩阵键盘，并通过数码管显示数据(By inversion method cyclic scan matrix keyboard, and through the digital display data)