生日快乐音乐播放，汇编编写的扬声器，不是蜂鸣器

nrf905无线开发 调试原代码 和51通信-Wireless Developer nrf905 debug the original code and 51 communications

时针芯片DS12C887a的C51底层程序-hand of a clock chip DS12C887a the bottom procedures C51

这是一个本人编写的程序，单片机89C52，主要是通过计量芯片ATT7028测量输入端的电压电流及电压电流间的各个夹角值，比较有用-This is the one I prepared procedures, 89C52 microcontroller, mainly through measuring chip ATT7028 measuring the input voltage and current, voltage and the current value of various angles, more useful

51单片机模拟I2C总线的C语言实现-51 microcontroller simulation I2C Bus C Language

采用ADC0809采集数据，并通过串口上传到上位机，采用C语言编写，简单易懂-using data acquisition, and through serial upload it to the PC using C language. easily understood

关于lcd12864代码，希望能给你带来帮助-About lcd12864 code, I hope you will help

使用68HC705J1A写的一个键盘的代码,包括资料说明,一份难得的资料,本人开发键盘时好不容易才找到的资料-68HC705J1A use of a keyboard to write code, including the information note, a rare information, I developed the keyboard is not easy to find when the information

avr串口实验,并且带有硬件原理图，程序简单，适合新手！-avr serial experiments, as well as with the hardware schematic diagram, a simple, suitable for novice!

基于测距式的超声波测距仪，以AT89C51单片机为核心，精度高、有数字显示功能，实验精度达0.5CM-location-based ultrasonic range finder to AT89C51 core, high precision, digital display, experimental accuracy of up to mile

显示驱动芯片HT1621的C51底层程序-display driver chip HT1621 the bottom procedures C51