AC Power Supply - L, N, Ground

AC Power Supply：

L：帶電端

N：不帶電端

Ground：接地線

 

光碟機出現驚嘆號，驅動程式可能已損毀或遺失解決方法

Step 1：在開始功能表中選擇『執行』，

 

Step 2：輸入『regedit』指令

 

Step 3：

在登錄碼：

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

中尋找其中的 UpperFilers 和 LowerFilters，將之刪除（如果只有找到一項那就刪除一項）

‎然後重新啟動電腦就好了。

被動元件與主動元件(Passive Component and Active Component)

• Passive components can't introduce net energy into the circuit. They also can't rely on a source of power, except for what is available from the (AC) circuit they are connected to. As a consequence they can't amplify (increase the power of a signal), although they may increase a voltage or current (such as is done by a transformer or resonant circuit). Passive components include two-terminal components such as resistors, capacitors, inductors, and transformers.


• Active components rely on a source of energy (usually from the DC circuit, which we have chosen to ignore) and usually can inject power into a circuit, though this is not part of the definition.^[1]. Active components include amplifying components such as transistors, triode vacuum tubes (valves), and tunnel diodes.

Reference：http://en.wikipedia.org/wiki/Electronic_component

我的理解：

任何必須依靠電流、或電流方向，才能施展其特性的功能者，稱為主動元件，反之則為被動元件。

任何能將功率增幅（Power）的，稱為主動元件，反之為被動元件。

 

兩者在電路上，皆會通過電子。

 

【範例】

主動元件：電晶體

被動元件：電阻、電容、電感、變壓器、二極體

Borland C++ Builder - W8058 Cannot create pre-compiled header: initialized data in header

Software - Borland C++ Builder

Problem - W8058 Cannot create pre-compiled header: initialized data in header

Solution - Select "None" in Pre-compiled headers section in Project Options Dialog in Borland C++ Builder 6.0.

 
  

USB(Universal Serial Bus) 檔案傳輸速度

檔案傳輸單位：MB/s

下列數據為根據 USB 制定標準所換算得出，實際速度視產品規格而定。

USB 1.0/1.1：0.1875 MB/s

USB 2.0：60 MB/s

USB 3.0：500 MB/s

  

速度上是相當大的懸殊呢