利用单片机实现简单音乐发生器，可以尝试实践一下，比较简单...

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为keil c51编写自己display接口- Compiles the oneself display connection for keil c51

51单片机读写usb移动硬盘。提供全套资料，原理图，固件源代码。-usb mass storage module

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离散 PID 控制 设计方法 ATMEL参考设计-PID control design method of discrete reference design ATMEL

寻迹小车，含详细的注释。1、电机有良好的驱动特性，可正、反转动，且转动平稳、有力；2、可靠的获取转速反馈信号；3、根据反馈信号使用有效的控制策略使电机达到所需的转速；4、利用码盘的反馈信号控制行走距离；5、 可以根据命令实现电机的特殊运行状态：刹车、惰行。-Tracing car, with detailed notes. 1, the electrical drive has good features, can be positive and negative rotation, and rotation smooth, powerful 2, reliable access to speed feedback signal 3, according to feedback signal to control the use of effective strategies to achieve the required motor speed 4, the use of encoder feedback signal control walking distance 5, can realize under the command of the special motor running: brakes, Inerting line.

LT_1B msp430开发板例子程序－LPM3

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