利用Atmel89C51、按键、蜂鸣器设计能播放十首歌曲的音乐播放系统，LCD能显示播放歌曲名-Use Atmel89C51, button, buzzer designed to play 10 songs music player system, LCD can display broadcast the song name

usb 68013A芯片原理图和PCB图-usb 68013A chip and PCB schematic diagram

本原程序基于8051F020,目的是掌握点阵液晶显示器的原理，电路设计及编程方法-Based on the primitive procedures 8051F020, aim is to grasp the principle of dot-matrix liquid crystal displays, circuit design and programming method

4对于进入密码锁的钥匙，假设复位后8个LED全亮，并使用sw1、sw2两个，然后sw2-> sw1-> sw1-> sw2，则表示解锁右侧会导致8个LED全暗。

DS18B20的驱动程序。通过KEIL C编译，在AT89S51上运行正常。-DS18B20 drivers. Through the KEIL C compiler, in the normal run AT89S51.

Elan eKTP8733N单片机开发程序，用于驱动I2C接口。在Elan 公司开发环境中使用。-Elan eKTP8733N single-chip development process, used to drive I2C interface. Elan has developed in the environment.

硬盘MP3的详细资料-drive MP3 detailed information

E2PROM 24c01 c02 程序-E2PROM process 24c01 C02

这个软件是设置时间的程序。可以把时间设置在寄存器中保存。-The software is set up time-consuming procedures. Time settings can be saved in the register.

继续上传：单片机89C51，LCD12864密码锁。-Continue to upload: Singlechip 89C51, LCD12864 locks.