JEFFREY's NOISE (j-noise) http://jeffrey.co.in/blog Blog on My Life, Open Hardware, Free Software, India ...... Fri, 19 Feb 2010 05:28:24 +0000 http://wordpress.org/?v=2.7 en hourly 1 New look for my webpage http://jeffrey.co.in/blog/2010/02/new-look-for-my-webpage/ http://jeffrey.co.in/blog/2010/02/new-look-for-my-webpage/#comments Fri, 19 Feb 2010 05:28:24 +0000 admin http://jeffrey.co.in/blog/?p=369 Its a long I updated my web page. So I thought of a new start. This time I made my page more simpler with basic black & white colour.

These days I was busy with my PG Diploma course in Embedded System Design. Update is going on…

]]> http://jeffrey.co.in/blog/2010/02/new-look-for-my-webpage/feed/ Electronic Design and Fabrication with gEDA http://jeffrey.co.in/blog/2009/12/electronic-design-and-fabrication-with-geda/ http://jeffrey.co.in/blog/2009/12/electronic-design-and-fabrication-with-geda/#comments Sat, 05 Dec 2009 03:33:59 +0000 admin http://jeffrey.co.in/blog/?p=364 “Electronic Design and Fabrication with gEDA” is my first article in LINUX For You Magazine.

This is the first time I am forgetting to blog about my article. Actually it was published in last month(NOVEMBER 2009) issue. Please read it if possible.

This article mainly gives a quick introduction about gEDA. I have also given some snaps of my designs.

http://jeffrey.co.in/articles_talks.html

]]> http://jeffrey.co.in/blog/2009/12/electronic-design-and-fabrication-with-geda/feed/ Robotic Pumpkin http://jeffrey.co.in/blog/2009/10/robotic-pumpkin/ http://jeffrey.co.in/blog/2009/10/robotic-pumpkin/#comments Fri, 09 Oct 2009 18:04:32 +0000 admin http://jeffrey.co.in/blog/?p=356 See this cool open source project from Evil Mad Scientist

Make a Robotic Snap-O-Lantern!

]]> http://jeffrey.co.in/blog/2009/10/robotic-pumpkin/feed/ Current Sinking & Current Sourcing Tutorials http://jeffrey.co.in/blog/2009/10/current-sinking-current-sourcing-tutorials/ http://jeffrey.co.in/blog/2009/10/current-sinking-current-sourcing-tutorials/#comments Sun, 04 Oct 2009 13:50:23 +0000 admin http://jeffrey.co.in/blog/?p=354 I have seen some web pages defining that current sinking and current sourcing are same. But the truth is that they are different. This is a tutorial about current sinking and current sourcing in Integrated Circuits(IC).

Current Sinking & Current Sourcing Tutorials

]]> http://jeffrey.co.in/blog/2009/10/current-sinking-current-sourcing-tutorials/feed/ More Octave Example Programs http://jeffrey.co.in/blog/2009/10/more-octave-example-programs/ http://jeffrey.co.in/blog/2009/10/more-octave-example-programs/#comments Fri, 02 Oct 2009 05:22:12 +0000 admin http://jeffrey.co.in/blog/?p=352 More example programs for Octave has been posted in my wiki page. Please vist

More  Octave Examples

If you don’t know about Octave, I have been maintaining a wiki page for Octave. See the link below

http://jeffrey.co.in/wiki/doku.php/experiments_using_octave_for_b-tech_course

]]> http://jeffrey.co.in/blog/2009/10/more-octave-example-programs/feed/ AT90USB162 Mini Development Board http://jeffrey.co.in/blog/2009/09/at90usb162-mini-development-board/ http://jeffrey.co.in/blog/2009/09/at90usb162-mini-development-board/#comments Sun, 06 Sep 2009 05:12:13 +0000 admin http://jeffrey.co.in/blog/?p=348 This time I am with an AVR USB board. It is an tiny development board for the AT90USB162 chips.  I have actually made this board design for my friend’s main project. The design has been made using gEDA. It’s an complete open hardware project. But still the schematics are missing.

Actually I have started drawing the board layout using pcb directly instead of using gsch2pcb. I will try to upload the schematic of the board soon as possible.

Special thanks to Sreeraj and Pramode Sir. This project was completed 3 months before. But I didn’t have much time for blogging. Sorry for the late post.

Here are some of the reference links
ATMEL AVR USB AT90USB162 MICROCONTROLLER PROTOTYPE DEVELOPMENT BOARD
AVRopendousDIP - avropendous - Open Hardware Development Board for the AT90USB162

Here is the board layout file.
sree-usb-noicsp.pcb

Here are some snapshots.

]]> http://jeffrey.co.in/blog/2009/09/at90usb162-mini-development-board/feed/ USB MP3 Player http://jeffrey.co.in/blog/2009/08/usb-mp3-player/ http://jeffrey.co.in/blog/2009/08/usb-mp3-player/#comments Sun, 09 Aug 2009 10:57:04 +0000 admin http://jeffrey.co.in/blog/?p=344 Last day I bought a USB MP3 player board from a local store in Thrissur. This board can read MP3 files from a USB thumb drive and play it for you.

The board circuit diagram is so simple that there are a very few connections. some of the connections are

  • IR sensor connection (3 wires - IR data, VCC, GND)
  • USB socket connection (4 wires - VCC, D-, D+, GND)
  • Power supply 5V (2 wires - VCC, GND)
  • Audio Out (3 wires - Left, Right, GND)
  • Switch (4 wires - Next, Previous, Play, Mode)

The other main features are an built in FM receiver and also an remote control. The player can read up to 1999 songs. I have not tried any other music formats other than MP3.

The main attraction is its cost. The board cost only 250 Rupees ( 5$).

If anyone needs the connection diagram of the board please do contact me :)

Here are some screen shots

Note(Nov 28, 2009): This is not an open hardware project. Please don’t ask for circuit diagram. I actually bought this circuit board from a local store. The connection details are so easy. The board has markings on it for the connections.

]]> http://jeffrey.co.in/blog/2009/08/usb-mp3-player/feed/ My New CPLD http://jeffrey.co.in/blog/2009/07/my-new-cpld/ http://jeffrey.co.in/blog/2009/07/my-new-cpld/#comments Fri, 17 Jul 2009 00:14:14 +0000 admin http://jeffrey.co.in/blog/?p=341 Two days before I got my CPLD (complex programmable logic device). Here are some snap shots of my CPLD XC9536.

The main problem is that there is not much support for programming these CPLD xc9536 using free software. There are tools available for programming this cpld. But all of them are for Windows platform.

But there is a small hope. The xilinx website is giving a software named ISE WebPACK Design Software. It’s linux version us available for download.

I have to start hacking the CPLD soon. I have designed the PCB for the JTAG Parallel Cable programmer using PCB.

I would like to say special thanks to Omkar Kulkarni for helping me a lot. He has written a very good tutorial for programming this xc9536 CPlD. check this link   http://elecrom.wordpress.com/2008/03/02/getting-started-with-xilinx-xc9536/

Here are some links that might be useful.

]]> http://jeffrey.co.in/blog/2009/07/my-new-cpld/feed/ Free Software Summer Training 09 http://jeffrey.co.in/blog/2009/06/free-software-summer-training-09/ http://jeffrey.co.in/blog/2009/06/free-software-summer-training-09/#comments Tue, 23 Jun 2009 06:00:08 +0000 admin http://jeffrey.co.in/blog/?p=338 Wanna get some cool training on Free software topics like How to do free software projects, Tutorials to use GIT , RPM Packing ? Then come to the online IRC summer training from Linux User Group of Durgapur (http://dgplug.org)

Entry is free. Just log on to the IRC of DGPLUG
#dgplug on irc.freenode.net

You can find more details on
http://wiki.dgplug.org/index.php/SummerTraining

All these training of this year are done by Shakthi Kannan (mbuf).

Time Table of these training are in the Summer Training page.

Just go through the class logs of the classes conducted last year and find out how effective it is.

Try to come for the IRC chat according to the time table given. I am sure it will help a lot.

Special thanks to dgplug for conducting these kind of online classes.

]]> http://jeffrey.co.in/blog/2009/06/free-software-summer-training-09/feed/ ATmega8 Mini Development Board http://jeffrey.co.in/blog/2009/05/atmega8-mini-development-board/ http://jeffrey.co.in/blog/2009/05/atmega8-mini-development-board/#comments Sun, 03 May 2009 11:52:13 +0000 admin http://jeffrey.co.in/blog/?p=335 In a pursuit of fabricating pcb’s, I have won. I had designed pcb’s boards using PCB. But when I tried to fabricate the pcb in my home, I used to fail. the problem was with the Acrobat Reader  . When I take the print out on the paper for layout transfer to the board, a size change occurs to the layout. This size change make the layout completely useless. Actually it was the wrong option selected in Acrobat Reader that made the size change.Now it is OK.

This is development board designed by me for the ATmega8 microcontroller. It is a miniature ARDUINO.  You can burn your bootloader and then use with Arduino IDE or you can simply upload your hex file using DAPA programmer circuit. If anyone needs its schematic file please post an comment or I will soon upload it when I am free.

Anyway this is an open hardware project. I will try to upload the details soon. If you are in a hurry, please comment so that I can upload the details fast.

Here is the PCB layout files http://jeffrey.co.in/files/mini-AVR.pcb

These are the two snap shots of my board

]]> http://jeffrey.co.in/blog/2009/05/atmega8-mini-development-board/feed/