Series RL circuit (Rev: 1.3)

Diagram 1: Inductor voltage (VL) and current (I) waveformsIn a pure inductor, current flows across the inductor lags the inductor voltage (VL) by 90 degree (diagram 1). In another words, inductor voltage (VL) leads the current by 90 degree (diagram 1). This is because when the voltage is applied to an inductor, the back ElectroMotive Force (EMF) [Lenz's law] resists current build up in the inductor, causing the inductor current (IL) to lag in time...

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Series RC circuit (Rev: 1.41)

Diagram 1: Capacitor voltage (VC) and current (I) waveformsIn a capacitor, current (I) flows across the capacitor leads the capacitor voltage (VC) by 90 degree (diagram 1). In another words, capacitor voltage (VC) lags the current (I) by 90 degree (diagram 1). This is because the voltage on a capacitor is directly proportional to the charge in the capacitor plates. The current must lead the voltage in time and phase in order to build up the charge...

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Backup your emails to a Personal Folder File (Rev: 1.2)

If you are using Microsoft Outlook 2000/2002/2003/2007/2010 or higher version, you can create a Personal Folder File (.pst) in Microsoft Outlook and stores your emails into it. You can copy your Personal Folder File (.pst) to another computer/notebook for backup purpose. The Personal Folder File is limited by your hard disk capacity and not subject to the mailbox size limits on the server.Microsoft Outlook can be configured to deliver new items to...

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Remove unwanted Solaris packages (Rev: 1.1)

After installing a full Solaris 10 5/2008 operating system (SPARC) with OEM support packages to the SUN Fire 280R server, I created a simple script (jrmpkg) to remove those packages that I did not want to free up hardisk space. You can copy and paste the below jrmpkg codes, and save it as any filename at your Solaris 10 machine. Modify the codes as you wish before running it.------------- BEGIN jrmpkg codes -----------------------#!/bin/csh# Jack, Aug 2008, Rev: 1.0# Remove unwanted packages for Solaris 10 5/2008# Russian 1251 fontspkgrm -v SUNW1251f#...

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Add a network printer (Rev: 1.3)

Assumptions:Your computer/notebook is using Windows XP Operating System and you have already login to the NUS network (recommended) using wired connection. If you are using wireless connection (NUS), please login to the WebVPN first before trying to search for the remote print server in NUS.The remote computer that acts as a print server and the shared printer are both power on.Kindly ensure that your computer Local Area Connection Properties(Start...

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Windows key shortcuts (Rev: 1.1)

If you are using Microsoft Windows Operating System with a Windows keyboard(has a "Windows key"), you can use the below Windows key shortcuts: (Show Start Menu) + d (Minimize/Restore all windows) + e (Open Windows Explorer) + f (Open Windows Search)+ L (Lock computer)+ m (Minimize all windows)+ r (Open Run dialog box)+ u (Open Accessibility Utility) + [Pause/Break] (Open System Properties dialog box) + [F1] (Open Help &...

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Fixmbr, Backup your MBR using MBRwizard or MBRFix (Rev: 1.2)

SituationI had a computer that used the GRUB boot loader to load either Fedora Core (FC) 5 or Windows XP Operating System (OS) during boot up. In Windows XP, I deleted the FC 5 partition to free up the hardisk space as I did not want to run the FC 5 anymore. During rebooting of the computer, the computer failed to load the Windows XP OS and it always stopped at the GRUB prompt.SolutionThe GRUB boot loader had installed itself as the master boot code to load the respective OS during the installation of FC 5. As I have deleted the FC 5 partition...

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