power_hvdc12pulse

说明：  使用超声波模块测距，测距范围 10cm--1..2m(Using ultrasonic module to measure distance, ranging range is 10cm-1.2m.)

STM32的I2S编程，开发板带的程序，有做I2S音频这块的同学可以看看(STM32 I2S programming, development board with the program, has done I2S audio piece classmates can look)

用单片机与MCP4725通信，产生一个可控制的模拟电压。(The MCP 4725 is communicated with a single chip computer to generate a controllable analog voltage.)

收音机IC SI473X code 内有代码实现收音机AM FM 搜台CODE 让你进一步了解概况收音机IC。以及该芯片的运用。 (The Radio IC SI473X code code you further understand overview Radio IC Radio AM FM station search CODE. As well as the use of the chip.)

毫欧级电阻测试方法，非常详细，很多高档仪器都是这种方法做的！测试行业必备(Very milliohm resistance test method, detailed, many high-end instruments are of this method do! The test of necessary)

以stc89c58为控制器，外围包括IIC，12864，蜂鸣器，AD模块(In stc89c58 for the controller, a peripheral including IIC, 12864, buzzer, AD module)

说明：  Si417发射机的PCB文件以及数据手册、arduino控制si4713的代码文件。(The PCB file of Si417 transmitter and the code file of data manual and Arduino controlling si4713.)

SPI通信---pic18系列单片机编程实现使用MAX7219控制4位7段数码管显示数字：0 1 2 3。(SPI communication--- pic18 series microcontroller programming using the MAX7219 control four 7-segment LED display digits: 0123.)

LCMV优化设计阵列处理信号，pwm整流器的建模仿真，音频信号通过LM386放大。( LCMV optimization design array signal processing, Modeling and simulation pwm rectifier LM386 audio signal amplification.)

c8051f的相关代码，包括USB通讯、SIP通讯、AD采样、时钟设置等(related code of c8051f, including USB communication, SIP communications, AD sampling clock settings)