Category Archives: Technology

Truth table

Truth table is a mathematical table used to describe all possible logic states or logic levels of logic circuit inputs and corresponding output. It may be single input logic circuit, two inputs, three inputs and even more. This is a truth table for NOT operation. It has only one input and only two input states… Read the rest

Boolean algebra

Boolean algebra is named after English mathematician George Boole who introduced this different type of algebra in his first book The Mathematical Analysis of Logic. It was the driving force in development of digital electronics. All modern programming languages use this algebra. It has application in other branches of mathematics also. In ordinary algebra variables… Read the rest

Digital Electronics

Electronics changed the world and digital electronics has changed electronics. This digital electronics is different from analogue electronics. Before starting discussion on digital electronics I think it’s better to have some discussion on analogue and digital concept. Time is changing continuously and your analogue watch dial changes continuously. Your car speedometer with needle, mercury thermometer,… Read the rest

Researchers turn Smartphone into microscope

Yes, researchers have made a special lens which turns your Smartphone into a microscope. It’s not a toy microscope, even health professionals will find it useful, researchers say. The research paper is published on journal of Biomedical Optics recently. Most importantly, this lens costs only 1 cent. So a Smartphone & a one cent lens… Read the rest

Fluorescent lamp explosion and ballast

Usage of fluorescent lamp is increasing because it’s four to six times efficient than incandescent lamp. Plasma state of matter is used in fluorescent lamps. Resistance of plasma decreases when electricity conducts through it. The danger lies in this property. Uncontrolled current through the plasma in the tube may produce heat and eventually the tube… Read the rest

Merge multiple PDF files

Why You may need to merge two or more than two pdf files. Sometimes large PDF files are broken before sending. Or different members of a team submit different portions of a project. Or suppose you have converted some of your hand notes to PDFs but you need to merge them. How You may use… Read the rest

Laptop computer or mobile phone explosion

Yes your laptop computer or mobile phone may explode. There are few instances of deadly explosions also. In 2006 Dell, Apple, Toshiba and Lenovo recalled their laptop batteries from the market. Even user’s laptop batteries were replaced. Injury due to overheat In 2002 a fifty year old Swedish scientist burned his penis and testicles. It… Read the rest

Copying texts from copy protected sites

How to copy texts from copy protected sites? Copying texts from websites are not always easy. Some websites have copy protection codes so that no one can select and copy the texts. But still you have chance to copy those texts. I will mention two ways to do it. Method one You may check the… Read the rest

Some simple Quick Basic Programs-1

These are some common Quick Basic programs by which almost every student starts his programming. Quick Basic is not obsolete yet, it’s still used to introduce students to the programming world. So try this and write more programs! I have run all this programs, so be sure that all the programs are correct. … Read the rest