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无线通讯nrf905，很适合初学者来学习，里边包括了对射频寄存器的设置什么的(Wireless communication nrf905, it is suitable for beginners to learn, inside contains the settings for RF registers what)

对于学习分析时序很有帮助，是一款逻辑分析仪的软件，很有用的。(Timing analysis is useful for learning, is a logic analyzer software, very useful.)

直流发电机的调速程序，使用的是STC12C5A的单片机，采用PWM技术来调节他的速度，简单便捷。(DC generator speed control program use is microcontroller of STC12C5A, and PWM technology to adjust his speed, simple and convenient.)

1单片机 控制直流电机转速 PID算法+C语言程序+Proteus仿真 采用PID控制算法控制电机转速，使得电机实际转速与设定转速保持一致。(1 MCU control DC motor speed PID algorithm+C language program+Proteus simulation using PID control algorithm to control motor speed, so that the actual motor speed and the set speed consistent.)

pic modified sine wave inverter circiut

RTX实时操作系统是应用于小型嵌入式多任务准并行操作系统实时性高系统性能好(RTX real-time operating system is applied to a small embedded multi task quasi parallel operating system with high real-time performance and good performance.)

上位机通信-配合XTMonitor显示温度等(PC communication- with XTMonitor display temperature, etc.)

uCOS+uCGUI例程，主控芯片为STM32，LCD采用FSMC接口连接，实现图形界面的操作(uCOS+uCGUI routines, the main chip for the STM32, the LCD FSMC interface connector, the operation of the graphical interface)

新一代地磁模块，助力高精度移动罗盘。新产品LSM303DLHC采用3x5x1mm微型封装，最小功耗仅为110µ A，可满足便携式消费电子应用对尺寸和功耗的限制性要求，同时还具有出色的测量精度和性能。 在一个封装内同时集成高性能运动感应和地磁感应(Ultra compact high performance e-compass 3D accelerometer and 3D magnetometer module)

说明：  本PDF文件为市电电压频率测量计的设计说明书！从中能了解相关的电路设计(The PDF file is mains voltage frequency meter design manual! From which to understand the relevant circuit design)