moyanqd的专栏

Duplicate Cleaner Pro v3.2.5 绿色中文破解版是一款功能非常强大的重复文件查找工具，这个是无需注册、无需安装的单文件绿色便携版！程序可以帮助你快速的查找重复的图片、音乐等各种文件，可以根据字节、MD5、SHA等多种方式来 快速扫描！当你的电脑使用时间长了，可能就会有很多重复的文件了，最常见的是图片文件和音乐文件，就用Duplicate Cleaner帮你查找下吧！它可以同时搜索多个文件夹，支持按文件名称、大小和时间进行搜索。 Duplicate Cleaner可以指定一些过滤条件进行查找，如查找图像/图片文件、音乐数据文件、影片文件、文本文件、Office文档等；可设定文件内容、文件名、 文件大小、日期等条件，而音乐文件的查找可以按照音乐tag指定搜索，如艺术家、标题、专辑等。特别的是它可以查找以Hard Link形式存在的重复文件。 Duplicate Cleaner搜索出的重复文件都会分组以不同的颜色表示，比较分明，要是重复文件很多的话，其自带的文件选择助手则相当方便，可以限定多种多样的选择标准。图像文件还可以方便的预览，打开图像预览工具后，点击每一个文件就会实时预览。

PCB Matrix公司的PCB封装设计命名规则

非常优秀的PCB设计辅助工具 程序包括： [B]PCB Via Current Calculator per IPC-2152[/B] Calculates the current a via needs to raise its temperature over ambient per IPC-2152. Other via properties include: Via capacitance Via inductance Via impedance Via step response Via DC resistance Via impedance Via resonant frequency [B]PCB Trace Width Calculator & PCB Trace Resistance Calculator per IPC-2152[/B] Calculates the current a conductor needs to raise its temperature over ambient per IPC-2152. Now also calculates DC resistance with temperature compensation. Other conductor properties include: Conductor skin depth Conductor voltage drop Conductor DC resistance Conductor power dissipation Bandwidth Calculator & Max PCB Trace Length Calculator Calculates the bandwidth of a digital signal and maximum trace length, using the IPC-2251 method or the frequency domain method, for transmission line effects. Wavelength calculator for given frequency. Differential Pair Impedance Calculator Calculates the differential pair impedance of a balanced line. PCB Padstack Calculator Calculates the outer and inner layer diameters of a padstack given the drill size. BGA land calculator based on the IPC-7351A specification. Mechanical Data Calculates wire diameter for a given AWG gauge. Drill chart with imperial and metric diameters. Imperial screw thread size chart. Minimum PCB Conductor Spacing Chart Calculates minimum conductor spacing's using peak AC or DC voltage based on IPC-2221A data. PCB conductor Impedances Calculates impedance of a PCB Microstrip or PCB Stripline. Inductance of a microstrip Capacitance of a microstrip Propagation delay of a microstrip Units Conversion Data Converts mm to mils and C to F. Embedded units chart for reference. Planar Inductor Calculator Calculates the inductance of a planar PCB spiral inductor. Power Delivery System Impedance Calculator Calculates the target impedance of a PDN. Thermal Resistance Calculator Calculates the junction temperature of a device using thermal resistance. Please check back often, this program is updated often per customer requests. What would you like to see in this program? Tell us now!

IPC-7351标准覆盖所有类型的无源及有源器件件的焊盘图形设计，包括电阻器、电容器、MELFS、TSSOPS、QFPS、球形阵列封装、方形扁平无引脚封装、小外形无引线封装等。IPC-7351为每个元件提供了三个焊盘图形几何形状，即高元件密度、中等元件密度、低元件密度，对应的PCB Libraries’ IPC-7351 LP Viewer软件中对应的CAD data库分别是SMM/SMN/SML，就是各个库中对应的相同的封装的焊盘尺寸不一样： 高元件密度：焊盘最小 中等元件密度：焊盘一般 低元件密度：焊盘最大情况，最牢固，如需翻修，最方便

数码管设计软件 功能超强 网上的都没有这个好用，我同事编的，可以根据16进制数据反推算数硬件连接

STM32 ISP 下载软件，武汉力源的，

STM32 PCB 库文件 protel99se

STM32 SCH 库文件 Protel99se