tuiwanbihuan2

线路通断检测器的设计： 1．用压电陶瓷蜂鸣片作为电声元件。 2．用两根导线作为测试探针 3．线路通断是通过测试电阻的大小来判断，有以下三种情况： （1）若150Ω<Rx<900Ω，则蜂鸣片不发出声响。 （2）若Rx>900Ω或者Rx<150Ω，则蜂鸣片发出间歇式的滴－滴声响。 以上各临界阻值（150Ω和900Ω），允许误差±10％ 4．＋15V直流稳压电源需要设计。 (Line-off detector design: 1. Piezoelectric ceramic buzzer as the electro-acoustic components. 2. As a test probe with two wires 3. Lines off by testing the resistance to determine the size, the following three conditions: (1) If 150Ω <Rx <900Ω, the buzzer is not audible. (2) If Rx> 900Ω or Rx <150Ω, then the buzzer sent intermittent drip- drip sound. Above the critical resistance (150Ω and 900Ω), tolerance ± 10 4.+15 V DC power supply need to design. )

说明：  基于STM32平台下的FSMC外接SRAM的程序(Program of FSMC external SRAM based on STM32 platform)

说明：  为快速傅里叶变换用c语言在51单片机中实现(Realization of Fast Fourier Transform with C Language in 51 Single Chip Microcomputer)

该程序利用89c51单片机和lcd液晶显示实现简易的数字示波器，可以显示输入的方波、正弦等信号。压缩包包括硬件连接和软件设计。(The program using 89 c51 and LCD liquid crystal display a simple digital oscilloscope, can display the input square wave and sine signal.Package including the hardware connection and software design.)

NFC协议第4部分，描述了NFC tag 4 通讯协议(NFC protocol fourth part describes the communication protocol NFC tag 4)

Frecuencymeter digital, clk frequency 10 MHZ, exhibition in 7 segments

学习ATK_ESP8266高性能UART_WIFI模块的使用,掌握基本的TCP，UDP通信串口AT指令配置方法，获取天气预报信息，并展示(Learn the use of high performance UART_WIFI module ATK_ESP8266, master the basic TCP, UDP communication serial port AT command configuration method, obtain weather forecast information, and display)

说明：  STM32+ads1118采集程序，已调通(STM32+ads1118 sample program)

将BLIF（Berkeley Logic Interchange Format）格式的电路转换为verilog代码，使用perl编写，需要perl环境才能使用。 内含BLIF格式的官方说明。(Translate BLIF（Berkeley Logic Interchange Format）circuit to verilog description, the translator need perl environment to run. Please check you have related tools. Also include a offical document about BLIF explanation.)

JT809通讯协议文档，介绍与交通部的平台间交换通信协议。(specifications for data exchange between customer platform and administrative platform)