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GNUdino Revised Version-0.2

Published on: March 20, 2009

I am back with the revised version of GNUdino-AVR.  This is actually one of the projects in FOSSTRONICS .  Also you can understand more about GNUdino-AVR from my previous blog post.

The last version that I had designed contains several errors.  But first I didn’t realize those mistakes.  But after posting to gEDA-User mailing list I got some suggestions.  These were some of the reply for the mail that I had received from gEDA-User mailing list when I had asked for error check.

My mail

Reply mails

Special thanks to gEDA-User mailing list members for pointing out the errors.

This version has a few of improvements.

1)  Components are on Component side (Last time by mistake I had placed them on the solder side).

2)  Polygons (There was no polygons in the last version).

3)  Numbering of components were removed  (Last time all resistors were ‘R1’ )

This is the source file GNUdino-AVR-0.2.pcb

This time also I have posted for a error check to the gEDA-User mailing list.

If you can please check the file GNUdino-AVR-0.2.pcb for errors. Also comment out those errors. It would be a great thanks if you can do that… :)

These are the files that I have used for tracing from the Eagle layout. The tracing process had been explained in the previous blog post. You don’t have to check these files for errors. These files have been placed for educational purpose i.e those who want to learn PCB track tracing in PCB.



For latest versions of GNUdino which are designed from me can be found from

GNUdino – ARDUINO design using gEDA

Published on: March 14, 2009

Arduino is one of the coolest board to start learning microcontroller programming. You can get a whole lot of documents from the internet. It’s an Open Hardware project. So that you are free to distribute it, copy it, modify it…. like a free software. Open hardware is a latest trend in the electronics field.

One of the problems of Arduino was that, it’s designs were done using a proprietry software named Eagle. Although free version of eagle is available from the net, it is not a free software. Also the free version of eagle has a limitation that we cannot design large boards.

So I thought of redesigning the Arduino Single-Sided Serial Board (version 3) board using free software gEDA (GNU Electronic Design and Automation) tool. These are the design files of the board.


These files are released under Creative Commons Attribution Share-Alike License 2.5.  You can use this file anywhere you want same as like the arduino license. Please give me proper credits while using this file and also give a link back to my page

I have designed this board by tracing the pcb layout of arduino which was designed using eagle. A small tutorial of tracing pcb’s by DJ Delorie is shown here.

Similar to the tutorial above, I am giving the files which I had first used for designing purpose.



Place these two files in a folder. Now in the terminal run the command

pcb –bg-image 125_90.ppm ard.pcb

You can see the pcb tracks over the arduino pcb design which was done using eagle. The pcb tracks were drawn on the component side. While loading the file, PCB will be showing the component side. So you will be seeing the tracks not sitting on the background image. To switch to the solder side press the “TAB” button. Now you will see the track alligned.

Please check the files for any mistakes. If there is any, please comment it.

If you have any comments please do it… :)

Sita Sings the Blues

Published on: March 05, 2009

“Sita Sings the Blues” is an animated feature (72 minutes) based on Sita’s adventures in the ancient Indian epic the Ramayana.

Visit Sita Sings the Blues for more info.

This is a cool collection of animated movies released under Creative Commons Attribution-Share Alike License .

I had a look at the website. Wow superb design. Cool animation. There are cool still images in the front page it self. I loved it. Have a look at those pages….

“Sita Sings the Blues” is the work done by Nina Paley.

You don’t need my permission to copy, share, publish, archive, show, sell, broadcast, or remix _Sita Sings the Blues. Conventional wisdom urges me to demand payment for every use of the film, but then how would people without money get to see it? How widely would the film be disseminated if it were limited by permission and fees? Control offers a false sense of security. The only real security I have is trusting you, trusting culture, and trusting freedom.     –from_ Sita Sings the Blues by Nina Paley.

There is also a faq page

Also a dedicated wiki

Read the interview with Nina Paley How Copyright Restrictions Suppress Art: An Interview With Nina Paley About “Sita Sings The Blues”

You can download the videos from

See a whole lot of stills from

This link for video has been taken from

Learn to solder

Published on: March 05, 2009

Soldering  is one of the essential skill required for an electronics hobbyist. These days I was searching for some cool soldering tutorials. And the result was my favourite site  INSTRUCTABLES .

You can check this link for a whole lot of soldering tutorials with some of them having videos.

The other web page I found was . Spark Fun is an amazing website. This website has all its circuit open. You can find a whole lot of tutorials and other thing about electronics from its page.

These kind of soldering skills are essential for hacking devices.

From my experience in soldering 50% of soldering skill is obtained by practice. But the remaining 50% skills can be improved only if you have good tools for soldering. At least have an micro soldering iron with you for doing SMD soldering.


Octave Tutorials

Published on: February 23, 2009

Octave is a kind of FREE SOFTWARE  replacement to matlab. But still these days matlab is being used by colleges for their lab purposes.

Even my B-Tech syllabus of calicut university has matlab to be learned. So I thought of  moving towards octave. These are some cool links to start with OCTAVE. You must have installed octave in your PC for using this.

These tutorials are not written by me. But I am planning to write one. It will contain some basic commands and also the experiments solved for the B-Tech Electronics and Communication Engineering.

Octave Introduction

Experiments using Octave for B-Tech course

Soon this page will be running up. Now I am going for my final year tour to Hyderabad (INDIA) .After that the tutorials will be setup…

You can just see a small experiment implemented by my friend using octave.

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