C51LCDdisplay

LCD1602显示的液晶密码锁，第一行显示显示固定密码，第二行显示输入密码，密码输入完毕后会有正确或者错误提示,为了演示方便，提示密码，输入密码部分也没有用星号代替。可以自行更换成星号。(The LCD1602 display LCD password lock, the first line shows the the display fixed password, and the second line enter the password after password input will be correct or error, and to demonstrate the convenience, prompting the password, enter the password part is not replaced with asterisks. Replaceable asterisk.)

PIC单片机开发，AD转换+uart控制+Timer1控制+eeprom控制 (develop for pic)

51单片机占空比调速或调光程序，仿真通过，里面有全部程序包括仿真文件(51 microcontroller duty cycle governor or dimming program, through simulation, which all procedures including simulation files)

说明：  使用555时基电路产生频率为20kHz-50kHz的方波Ⅰ作为信号源；利用此方波Ⅰ，可在四个通道输出4种波形；每通道输出方波Ⅱ、三角波、正弦波Ⅰ、正弦波Ⅱ中的一种波形，每通道输出的负载电阻均为600欧姆。限用NE555、NE5532（或LM358）、电容和电阻若干。(-Waveform generator with schematic + circuit + program)

说明：  利用C语言实现MSP430单片机对TLC5491A/D的数据采集(Using C language to realize MSP430 Singlechip TLC5491A/D data acquisition)

this a keypad matrix applicable for ZDSII

Keil_MDK4+JLINK_V8基于LPC1788的调试，版本V1.0(Keil_MDK4+JLINK_V8 based LPC1788 debugging, version V1.0)

很好的单片机资料， 里面的串口实现实例很清楚， 而且内附C语言和ASM代码(Good chip data, which the serial implementation instance is very clear, with full C language and ASM code)

STM32的I2S编程，开发板带的程序，有做I2S音频这块的同学可以看看(STM32 I2S programming, development board with the program, has done I2S audio piece classmates can look)

STM32通用精确us延时函数；包含标准库和HAL库两种，直接声明调用即可。(STM32 HAL library common precision us delay function; standard library to use as long as the corresponding parameter variable to standard library format can be.)