RSS
 

Save your data forever – The M-DISC™

12 Oct

 

As technology rapidly advances, we’re living longer, doing more, creating more memories and recording more data. Every scrapbooker, business owner, photographer, every person fears losing the legacy they have spent their lifetime creating. M-DISC™ eliminates that fear. Once written, your documents, medical records, photos, videos and data will last up to 1,000 years. “Just M-Disc™ and Forget It!”

 


 

M-DISC™ is the only data storage solution to withstand rigorous testing by the U.S. Department of Defense. Even today’s leading archival optical discs weren’t up to the challenge. M-DISC™ is resistant to extreme conditions of light, temperature, Read the rest of this entry »

 
No Comments

Posted in Uncategorized

 

Linux Kernel MTRR Trim problems

13 Mar

I recently came across an interesting problem with a newly purchased set of servers. These were HP DL165 G7, very nice 1U machines with dual sockets and capable of good RAM expansion. Once the OS (64 Bit CentOS) was booted it couldn’t see the full 16GB of installed memory. The memory being reported was only 3011MB, 3GB approx.

On closer examination it was established that the dmesg log had a indicated a potential problem, the message suggested that some of the memory, although detected by the kernel was “trimmed” and the box was left with 3GB to run.

The problem was fixed by enabling the kernel argument “disable_mtrr_trim”.

 
No Comments

Posted in Kernel, Linux

 

High Performance Python

08 Mar

Here is a very interesting lecture about high performance, I hope you enjoy it as much as I did…

 
No Comments

Posted in Programming, Python

 

Microchip’s Free MPLAB® XC32++ Compiler

16 Nov

The Free version of the MPLAB XC32++ Compiler is available for download now at http://www.microchip.com/get/10E7 . 

It has no time or memory limits, and can be used in commercial applications.  With the Free MPLAB XC32++, Microchip is offering a completely free C/C++ compiler solution with unlimited code generation,” said Derek Carlson, Microchip’s vice president of Development Tools.  “Our optimizing C++ compiler includes the industry-recognized Dinkumware libraries.  This combination is ideal for a broad range of applications, from the industrial to the academic environments.”

The featured offered include:

  • Compliant with the majority of C++98 and C++2003 ANSI standards
  • Includes Dinkumware standard C, C++, and template libraries
  • Can be used with all C++ or mixed C/C++ projects in MPLAB® XC32
  • All Microchip C language extensions are available for use

 

 
No Comments

Posted in C++, Micro Controllers, PIC 32, Programming, Tools & Tips

 

The case of the missing Index

15 Nov

 

 

Just wanted to share this very well written article from RedGate, mainly of interest to those who manage & administer databases.

http://bit.ly/W8rleu

Enjoy !

 
No Comments

Posted in Uncategorized

 

Hans Camenzind, Father of the NE555, Dies at the Age of 78

07 Sep

Last month one of the unsung heroes of electronics has passed away. Hans Camenzind, father of one of the most famous integrated circuit of all times, the Signetics timer NE555, timed out at the age of 78. Being a gifted analog designer, Swiss-born Monsieur Camenzind is also credited to be the father of class-D amplifiers and he has introduced the concept of the Phase-Locked Loop (PLL) in ICs. During his rather productive career he designed over 140 ICs, wrote several books and many articles and his name is attached to some twenty patents.

When a famous artists dies you will hear his or her greatest hits on every radio or see his or her best films on every TV channel. Therefore, as a tribute to one of the great electronics inventors of our century we will play here Hans Camenzind’s most successful composition: NE555 in bipolar.

 
No Comments

Posted in Uncategorized

 

3D Printers

11 Aug

3D printers have been there for a while, but are becoming commercially viable now. I have been through the specs for Z technologies’s model 650, which has a printing volume of 12,000 cubic inches. Pretty usable for prototyping a lot of stuff. You can find a lot of demos on youtube for this stuff. I specially liked a model aircraft that was “printed”.

I wonder how green the technology really is, as no one knows what constitutes the pixie dust and how environment friendly is it to manufacture.

However, they are fun to watch… and the results look awesome. Have a look !

 
No Comments

Posted in Computer Hardware, Printers - 3D

 

Digital Graffiti – Arduino based txtBOMBER

05 Jul

Time for a techie fun post today.

Wall chalking and graffiti is kind of shunned in most social circles, except for the ones which are artistic minded. Well, my aesthetic sense isn’t good enough and I end up confused when it comes to the choice of colors. I was however intrigued by a three year old invention by a German fellow who created this little gadget that looks like a paint roller but is in fact a digital plotter like device that can print a text message on the underlying wall by actuating different brushes that leaves a dot-matrix imprint of the digitally stored text in the Arduino memory.

I am not sure if the device has been manufactured commercially, as wall chalking aids are discouraged :) But it is fun watching a hand-held plotter in action on a wall.

txtBomber In Action

Click here for more photos and details.

 

 
No Comments

Posted in Arduino, Micro Controllers

 

IPv6 Certification for WebMasters – Is my server IPv6 compliant?

11 Jun

Okay, it’s easy enough to tell if your Internet connectivity is IPv6 compliant, just check out the previous post. A bigger question is if your computer/server/network is on the other end of the connection? Yes, if you are running a server that needs to be connected to by loads of clients who all will be using IPv6 soon if not doing so already…

I know that HE.net (Hurricane Electric) have been running an IPv6 project for a long time, recently they have launched a free IPv6 certification project that takes you through the compliance process as a webmaster/hosting provider.

The certification enables you to perform the following:

  • Prove that you have IPv6 connectivity
  • Prove that you have a working IPv6 web server
  • Prove that you have a working IPv6 email address
  • Prove that you have working forward IPv6 DNS
  • Prove that you have working reverse IPv6 DNS for your mail server
  • Prove that you have name servers with IPv6 addresses that can respond to queries via IPv6
  • Prove your knowledge of IPv6 technologies through quick and easy testing

Not just that, it will let you have a good grasp at the following:

  • the format of IPv6 addresses
  • AAAA records
  • reverse DNS for IPv6
  • the IPv6 localhost address
  • the IPv6 default route
  • the IPv6 documentation prefix
  • the IPv6 link local prefix
  • the IPv6 multicast prefix
  • how to do an IPv6 ping
  • how to do an IPv6 traceroute
  • common IPv6 prefix lengths such as /64, /48, /32

For more details regarding the IPv6 certification process, please follow this link: http://bit.ly/KuguWk

 

 
No Comments

Posted in Internet, Internet Protocols, IPv6, Tools & Tips

 

IPv6 – How to tell if I am ready for it?

11 Jun

Yes, IPv6 is finally going to reach the user end. Our broadband providers will soon start furnishing IPv6 addresses to our routers and we’ll have the liberty of using IPv6 addresses on our private networks as well (although some of us could have been using it for many years).

So, how do I tell if my internet connection supports IPv6? Yahoo have kindly provided a very simple way to test exactly that.

http://yhoo.it/KmFuVN

Once you are on the page, just hit the Start IPv6 Test button and you’ll find out if your broadband is IPv6 compliant.

Happy IPv6 all.. !

 
No Comments

Posted in Internet, Internet Protocols, IPv6, Tools & Tips

 
« Older Entries