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msp430单片机的入门者，可以看看，会有一些帮助。(msp430 microcontroller beginners, you can see, there will be some help.)

自己画的四轴飞行器，原理图，pcb。。。。。。。。。。。。。。。。。。。。。。。为了20个子，我真的不容易(Own painting Four aircraft, schematics, pcb)

一个交通灯的设计，具有自动控制与手动控制的功能。(The design of a traffic light has the function of automatic control and manual control.)

摘要 电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。 基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。 关键词：数字合成信号源；程控；调幅；调频；移相； (Abstract Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration. Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)

晨星Mstar的MST703参考手册。 MST703是一款性价比非常高的视频解码器及小尺寸TFT液晶屏驱动芯片，外围电路简单。(Mstar MST703 Reference Manual. MST703 is a very high cost of video decoders and small size TFT LCD driver chip, the external circuit is simple.)

说明：  本代码是用51单片机实现rc522芯片的功能源程序，本程序是做一个读卡器！！！(This code is a single chip with 51 source rc522 chip function, this program is to be a reader! ! !)

at89c51 的跑马灯程序. 把LED灯连接到端口0然后用烧录到单片机就行了.(This is an AT89C51 LED chaser program. Connect LEDs to port 1 and then use KEIL to compile the leds1.C into a .hex file then download t to your microcontroller.)

DS1302高精度时钟+LCD1602。实现时钟的高精度及芯片的资料(DS1302 high-precision clock+LCD1602. Achieve high-precision clock chip)

SAMSUNG S3C2440开发文档大全---(。)

安卓摇一摇案例，安卓传感器的学习模版，值得学习(Andrews shake case study template Andrews sensor, it is worth learning)