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Drawdio Hacked !!

09 Feb 2009


One of the cool device designed by Jay Silver of MIT is DRAWDIO.  Drawdio is a pencil that can make sound. Don’t be surprised. In short drawdio is a pencil that lets you draw music.

See this page http://web.media.mit.edu/~silver/drawdio/play.htm

I decided to build that pencil. I collected documents from Ladyada’s Drawdio page. The TLC 551 IC was not available in the electronics market in THRISSUR. Actually TLC 551 is a low voltage version of LM 555. So I decided to replace TLC 551 with LM 555.

After building the circuit, I fed it with 5V supply. Since it was LM 555 I fed 5V. If it were TLC 551 we can use a AAA battery to power the circuit.

But the transistor started to heat up. I think that the transistor (amplifier) circuit was designed to be powered from AAA battery. So the 5V might have made it to heat up.

There comes my hack. It’s not actually a hack. I found that we can easily replace the amplifier circuit and the speaker with a buzzer. I have redrawn the circuit with the buzzer. You can download the modified circuit.

drawdio.sch

drawdio.pdf

This circuit succeeded for a 5V powered LM 555 circuit. But I don’t think it will work if you use a AAA battery to power the circuit and also replacing the LM 555 with TLC 551. If the circuit is powered by a AAA battery, the buzzer wont produce sound that is much audible. so in that case you will have to use the amplifier and the speaker circuit.

These are the two snapshots that has been modified from

http://web.media.mit.edu/~silver/drawdio/make.htm


Use this snaps together with the circuit diagram to build the DRAWDIO. See these snaps. These are test run done by me on the breadboard.

HAPPY DRAWING…..


Project Euler for hackers

07 Feb 2009


Want to be superb in mathemetics and programming?

See this Project Euler

Try to solve the problems over here

http://projecteuler.net/index.php?section=problems

I think in this way hacking skill can be increased….


Cool Avatars on my blog

06 Feb 2009


An avatar is a computer user’s representation of himself/herself or alter ego, whether in the form of a three-dimensional model used in computer games, a two-dimensional icon (picture) used on Internet forums and other communities, or a text construct found on early systems such as MUDs. It is an “object” representing the embodiment of the user. The term “avatar” can also refer to the personality connected with the screen name{.mw-redirect}, or handle, of an Internet user. — Wikipedia

I was in search of some cool avatars. It was at that time I came with Splitbrain‘s Monster ID. Using his package you can create cool moster avatars…

From his page I got the wordpress plugin for Monster ID maintained by Scott. You can download the plugin from his page and have cool avatars come up when some one comments your blog. Now cool monster’s come on my comments my blog. The monsters now created are based on email address. Even monsters can be created using ip address etc….

The avatars wont come as soon as you comment. You will have to just refresh the page.

This was the avatar that I got from the comments posted by me


My first blog post in my own blog

05 Feb 2009


Hi…

It’s long I have blogged. Actually this is my first post in this year !

Special thanks to God almighty, my parents, my brother, and all my friends and relatives…

Now onwards this blog will be updated in every 2 or 3 days. Please keep in touch…

This blog is powered by wordpress 2.7 and k2 theme


FSUG Thrissur Inauguration was completed

06 Dec 2008


Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

](http://pramode.net/2008/12/05/a-window-to-freedom-report-on-dec-4th-free-software-users-group-thrissur-meeting/)

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

](http://pramode.net/2008/12/05/a-window-to-freedom-report-on-dec-4th-free-software-users-group-thrissur-meeting/)

](http://aswinatgec.wordpress.com/2008/12/05/fsugtsr-a-window-to-freedom/)

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

](http://pramode.net/2008/12/05/a-window-to-freedom-report-on-dec-4th-free-software-users-group-thrissur-meeting/)

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

[Day before yesterday was FSUG Thrissur inauguration. I am sad to say that I was not there because of my stupid university exams. I reached at the end around 5.30pm for the eating ceremony. Here are some of the reports that can be checked

](http://pramode.net/2008/12/05/a-window-to-freedom-report-on-dec-4th-free-software-users-group-thrissur-meeting/)

](http://aswinatgec.wordpress.com/2008/12/05/fsugtsr-a-window-to-freedom/)

](http://alexp0205.wordpress.com/2008/12/06/the-success-story-of-a-window-to-freedom-organised-by-fsugtsr/)



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