Jun 21

EMI Being associated with bank for short-term, I often get this question from friends and relatives.  How to calculate EMI?  When you apply for loan, they will just tell you the EMI, but does not tell you how they are calculated unless you ask them specifically to show how they calculated it.  EMI table is also called as amortization table, which shows the balance at each installment.

EMI or equated monthly installments is the most popular form of loan payment.  It is a fixed amount of repayment made every month towards the loan, which includes payment towards both principal and interest.

It is easy to prepare an EMI table in Excel sheet.  There is a financial function called PMT to calculate the EMI.

PMT(rate,nper,pv)

rate – Interest rate for the loan.
nper – Total number of payments for the loan.
pv – Present value/principal.

Prepare excel sheet with the following data and enter the PMT function in the cell “C7.”

EMI_Calculator

  • Rate = C6/C5, which divides rate of interest by number of months thus giving rate of interest per month.
  • Nper = C4*C5, which gives total number of months we need to pay equated installment.
  • Do not forget to take the loan amount in minus value, so that our EMI table shows positive values.

Now prepare table with Serial Number of Payment, Monthly Installment, Interest Amount, Principal Amount, and Balance.  Take the first row with serial number “0” and in the balance amount point the cell to “Loan Amount” – type “=C3”  Next Enter the serial number as 1.  Monthly installments will remain same so take absolute cell reference (by adding $) which will not change when you drag the cells to auto increment.  In “Monthly Installment” column, enter “=$C$7“.  In the “Interest Amount” column, enter “=F10*$C$6/$C$5” which means we are dividing the balance amount at the end of the month by monthly interest rate (rate of interest/payments per year).  As the rate of interest and yearly payments are not going to change, we used absolute reference using $ sign.  In “Principal Amount” column type “=C11-D11” which deducts the monthly interest from monthly EMI and whatever the balance available shows as payment towards the principal amount.  In “Balance” column enter,” =F10-E11“, which means we are deducting the principal amount in the EMI to ascertain the original balance at the end of the month upon which we are going to calculate interest for the next month.  Now select the row and drag it until balance becomes “0”.

EMI_Table
That’s all!  We made our own EMI calculator in Excel.  This Excel EMI calculator is created for a tenure of 20 years.  If you are just calculating for 5 years, i.e., 60 months, 61st month shows values red colored and in minus range.   So you need to take up to “0” in the balance column.  Ignore the values in RED.  If you want to calculate for more years, then just select the last row and drag it to extend it.

Download the Excel EMI Calculator.

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Jun 07

Windows XpI have installed Ubuntu on Windows XP just to see how the new version is looking and try some features. At the end of the day, I have uninstalled it, but struck with the problem of bootloader. After installing Ubuntu, it has made changes to Windows bootloader so that while booting we can select Windows XP or Ubuntu from the list. Though I uninstalled the Ubuntu, the bootloader continued to show both operating systems and it was really annoying.

So, I have searched the Internet if there is any solution and what everyone was to use the Windows XP CD to repair it. Once we boot into the XP CD, we need to type “fixmbr” into recovery console to repair it. So, I digged the net to see if there is a simple solution and came with this. It worked for me great and there is no need to have XP CD. Follow these steps and you are done.

  • Right click on “My Computer” and click “Properties” which is at the end of the menu.
  • Select the “Advanced” tab from the list of tabs. Then, click “Settings” button in the “Startup and Recovery” section at the bottom.
  • It will open up a new window and then click “Edit” button, which will load boot.ini in notepad where you can edit it.

A normal boot.info file look like this:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Microsoft Windows XP Professional”/fastdetect

Though I have uninstalled the Ubuntu, the boot.ini was looking like this:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Microsoft Windows XP Professional”/noexecute= optin/fastdetect
c:\wubildr.mbr=”Ubuntu”

I have just copied the normal boot.ini code into the boot.ini, saved it, and restarted. Voila…..I got rid of the nagging dual boot window.  Below are the screenshots to guide you visually.

Bootloader 1

Bootloader 2

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Jun 02

FLV2MP3Today, I transferred approximately 200 music files into my mobile phone, but when I tried to play them, only 30-35 files were showing up in the media player.  After a quick check, I found that the player in my mobile phone can only play WAV and MP3 files.  When I looked at the files, they were mostly in FLV format.  So, quickly done a search on the Google and found this tiny tool, which is just 500KB.  It is really an amazing tiny application, which took less than half a minute to install and only few seconds to convert all the 170 FLV files into MP3.  Quality remained intact.

Download FLV2MP3 converter (on Ziddu), install it, and when you run it a small window will appear.  Just drop your files onto it and it will convert it to MP3 and stores in the same directory with the same file name.

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May 20

ZoomIt is a free screen zooming and annotation tool, which is very useful tool for the people who give presentations through projectors.  It is a tiny application, only 130 KB and has lot of functions like zooming, drawing, and typing on the zoomed screen.

ZoomIt
It is just a single file which you can place anywhere and once you start it, it sits in the system tray and you can access it with hotkeys.  When you use it first time it shows the hotkeys already assigned and gives an option to modify them as per our choice.

It has the features like (default hotkeys are listed along with in brackets):

  • Zoom (Ctrl+1)
  • Draw (Mouse Left Click)/Cancel Drawing (Mouse Right Click)
  • Changing Pen Color (Type “r” for Red, “g” for green, “b” for blue, “o” for orange, “y” for yellow, and “p” for pink)
  • Pen Width (Mouse Wheel or Up and Down Arrow Keys)
  • Straight Line (Hold down the Shift Key while drawing)
  • Rectangle (Hold down the Ctrl Key while drawing)
  • Ellipse (Hold down the Tab Key while drawing)
  • Copy Zoomed Screens (Ctrl+C)
  • Save Zoomed Screens (Ctrl+S)
  • Draw Without Zoom (Ctrl+2)
  • Typing (Press “t” from keyboard)
  • Arrow Key (Ctrl+Shift+Right/Left move with mouse)

This is a free product and you can get it from Microsoft’s website here.

ZoomIt_Screen

Click on the picture to view full size image

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May 04

websnapr This week I have worked on a project, which required me to categorize few websites and show screenshots of those websites arranged neatly.  Special requirement was dynamic creation of website screenshots because if the administrator wants, he will just add the URL and the screenshot need to be generated automatically.

I have searched for few solutions and ended up using Websnapr.  It has very simple API to fetch the screenshots of websites.  If it does not have the screenshot for the website we need, it will update it in few seconds after the first request made for it.

There are free and premium services available.  Free service allows 100,000 requests per month and if your site needs more than that, then you need to upgrade.  It is around $45 per month.  Website screenshots will be updated once in a month.

Go to Websnapr and register for a free account with the domain where you want to implement their service.  It will give you an API key, which looks like “123ABc1abcdA.”  Then, edit HTML of your website and use the following code to render the dynamic web screenshots.

<img src=”http://images.websnapr.com/?size=Size&key=YourAPIKeyHere&url=http://www.DomainURL.com” />

“Size” parameters: Use “T” for 92×70 pixel screenshots and “S” for 202×152 pixel screenshots.

If your site requests are more than 100,000, either you need to upgrade to their premium service or you can use tiny Firefox extensions to manually grab the screenshots.  Use Screengab, Abduction!, or FireShot if you are looking for advanced editing features.

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Mar 30

Debit CardAs per RBI’s circular, with effect from April 1st, 2009, you can use any ATM in India for money withdrawal, account balance, or printing mini statement for FREE irrespective of your card issuing bank.  RBI issued instructions at the beginning of this year to all the banks not to levy more than Rs.20 per transaction done by other bank’s account holder.  For example, if you are an ICICI Bank account holder and if you are using ICICI ATM card to withdraw money from an SBI ATM, you will be charged a maximum of Rs.20 per transaction.  This will be in effect till March 31, 2009 and from April 1st, irrespective of your bank account, you can use your ATM card to do the above transactions at any bank’s ATM for free.

I am really happy to see this.  Before this, if I am going to a new place, carrying all my bank cards was necessary because I would not know which ATM I can find first.  As the charges have come down to Rs. 20 lately, I have been using other bank’s ATMs frequently because I am not worried about Rs.20 as I can find other bank’s ATMs in my colony in just few steps.  Now, even this Rs. 20 per transaction charge is going to be taken off from day after tomorrow and I can simply walk into any ATM and withdraw the money :)

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Mar 29

cdToday, I downloaded a file that was having the file extension of DAA.  I do not know what DAA is and a quick search on Google told me that it is a PowerISO disc image.  Though I heard about PowerISO, I do not know that .DAA (Direct Access Archive) is PowerISO file’s extension.

PowerISO is a $30 commercial software to create, mount, and edit the disc images.  .DAA is a proprietary format of PowerISO and not handled by other mounting or burning software.

Wikipedia article on DAA also contained links to the program, which can convert DAA image to an ISO image, which I can in turn open using 7-Zip.  So, here it is.

DAA2ISO is a tiny program (just 47.4 KB), which can convert DAA image to an ISO image.  Then, you can burn it to a CD using your own CD burner or view the files in it using 7-Zip or WinRAR.  Mac users can download Mac port of this utility at Twilight Edge Software.  Linux users can download command line tool from PowerISO website itself.  Download the archive and run the exe file.  It will open a file open dialog to locate the file and once selected, it will ask for the saving location.  That’s all.  It opens a DOS window and shows the progress.  It was too fast and it has converted a 1 GB DAA file in less than two minutes.

Mirror of DAA converter for all three OSes in a single zip file.

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Mar 22

My brother works as a service engineer in a company involved in electrification projects.  He has seen a company using project management software handling the projects and wanted to do the same in his company.  So, we spent time on searching free alternatives to MS Project and found these interesting alternatives, which have the same functionality as MS Project.

What is MS Project?

MS Project or any Project Management Software will help the project managers to create plans, assign resources to tasks, track the progress of the work, and manage budges and workloads.  The following is the description taken from Wikipedia:

Project creates budgets based on assignment work and resource rates. As resources are assigned to tasks and assignment work estimated, the program calculates the cost equals the work times the rate, which rolls up to the task level and then to any summary tasks and finally to the project level. Resource definitions (people, equipment and materials) can be shared between projects using a shared resource pool. Each resource can have its own calendar, which defines what days and shifts a resource is available. Resource rates are used to calculate resource assignment costs which are rolled up and summarized at the resource level. Each resource can be assigned to multiple tasks in multiple plans and each task can be assigned multiple resources, and the application schedules task work based on the resource availability as defined in the resource calendars. All resources can be defined in an enterprise-wide resource pool.

Below are the three alternatives I found.

OpenProj OpenProj: OpenProj is a free open-source project management solution.  This is the first one I found and even I read some blog posts stating that small companies are using this software successfully as an alternative to MS Project.  OpenProj is available in Windows, Mac, and Linux versions.  Site also says that OpenProj has been translated into French, Spanish, German, Portuguese, Swedish, Finnish, Galician, Persian, Russian, Korean and Chinese.  Even, my brother selected this for his projects.  It is just 6 MB approximately.

OpenProj Chart

Continue reading »

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