HT3117

基于AVR单片机的模数转换程序编写，使用ICCAVR软件编写(Analog to digital conversion process based on the AVR microcontroller to write, to write software using ICCAVR)

Proteus画的51单片机超声测距并仿真。(Proteus carry out the ultrasonic measure distance circuit using 51SOC and simulate。)

有源滤波的介绍，文中详细介绍了几种有源滤波电路图(The introduction of the active filter)

51单片机“祝你平安”音乐程序，用单片机播放音乐，蜂鸣器发声(failed to translate)

基于STM32F1的RFID M1卡的读写程序，RFID芯片是NXP的RC522(Based on STM32F1 RFID M1 card reader program, RFID chip is NXP s RC522)

红外+modbus从机 stm32f103控制格力空调 可以实现 空调开关 设置冷热模式和设定温度，另外加上DS18B20测温(红外+modbus从机 控制格力空调 可以实现 空调开关 设置冷热模式和设定温度，另外加上DS18B20测温)

只有音频采集模块的软硬件，不包括主控制板部分，软件编程使用的Keil软件，有相应的注释，便于学习。(Only the hardware and software of the audio acquisition module, excluding the main control board, are included. Keil software is used in software programming. It has corresponding annotations for easy learning.)

C#写的ADSL拨号程序示例,ADSL自动拨号类,前提是在系统中已经有了一个宽带拨号连接(C# to write the ADSL dial-up procedures for example, ADSL automatic dial-up category, the premise that the system has made a broadband dial-up connection)

虚拟信号采集分析器 1）：利用信号发生器产生不同信号（信号的相关参数可调） 2）：在信号上叠加白噪声。 3）：对上述信号进行采样（采样频率可调） 4）：在采样的过程中利用均值滤波（每三个点取均值） 5）显示采样后的波形，并对其进行频率分析。 6）：将采样后的波形与原波形做比较（在同一坐标系中显示(Virtual signal acquisition Analyzer 1): Using the signal generator to produce different signals (signals adjustable parameters) 2): white noise superimposed on the signal. 3): The above signal is sampled (sampling frequency adjustable) 4): Using the mean filter (averaging three points each) 5) during the sampling process after sampling the waveform display, and its frequency analysis. 6): After sampling the waveform is compared with the original waveform (shown in the same coordinate system)

16*16点阵显示串口接收的数据。STC90C54AD单片机。(16* 16 dot matrix display the received data serial port)