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Linux is an operating system, core kernel or the actual operating system.  It was developed by Linus Torvalds. The first prototypes of Linux were publicly released later that year (1991) under the GNU General Public License, designed and drafted by  Richard Stallman commonly knows as RMS the free software guru.

A digital multimeter is a very important instrument that one need for basic electronics purpose and hobby projects.

The Multipurpose Theme used in Drupal is a nice clean theme.  It alos provides a section of social icons links. But when you look at the theme settings you will notice there are only entries for Twitter, Facebook, Google Plus, Pinterest.

This post is related to Drupal 7x and the related theme.

A lot of people are going in for solar energy these days.  Most important part of solar electric energy are the solar panels and also the most costly.  Unfortunately till date they are not as rugged as they should be.

Lot of people today are looking forward towards free energy, green energy etc.  In this post I am going to illustrate with an example if solar based heating systems are worth invsting or not?

First thing, If you are a green energy fan, then totally yes, solar water heater are definitely useful as they consume no electrical power. And when they get good sunshine (avg 4 hours per day) they can give you really hot water. Hot enough to burn you skin. (approx 70 Deg in summer, based on experience in Pune, India)

About power saving — Definitely yes as it will not consume any electricity.

With CD/DVD drives almost gone from our systems, the easiest way today to install a new system is via a USB pen drive. This article guides you how to create a bootable pen drive of a Linux ISO image, so that you are able to boot and install from the same.

Simple water level controller/indicator using the concept of common emmiter configuration.

Blender 3D is an Open-source 3D creation suite. Blender 3D is a Free and Open-source 3D creation suite.  Blender has been there since 2003 (open-source) and we have seen it evolving over a period of time into a really amazing tool. The release Blender 2.80 is exciting in terms of a completely revamped interface a lots of new features. Lets have a look at what's new here

Used cycles engine for render and materials.

9V PP3 Battery

Chess board with Blender 3D.

Used cycles engine for render and materials.

Pieces are of glass material with IOR value of 1.44