A voltage stabilizer is an electrical appliance used to feed constant voltage current to electrical gadgets like ACs and computers, and protects them from damage due to voltage fluctuations. It works on the principle of a transformer, where the input current is connected to primary windings and output is received from secondary windings. When there is a drop in incoming …

The PackBot Tactical Robot is deployed by the US in wars. It was first used by US ground troops in Afghanistan in 2002 to help clear caves and bunkers, search buildings and cross live minefields. They were also used in 2003 in Iraq in urban warfare and to search vehicles. By 2007, more than 800 PackBot robots were in operation …

Nesting Boxes Fifteen years ago we built a nesting box and hung it on a tree in a shady spot of the garden where cats could not reach it. During every one of those fifteen years it had been tenanted by blue tits. These feathered visitors have made a welcome addition to the garden, which most of us would appreciate. …

The Marathon is a long, gruelling race which traditionally closes the Olympic events. It is taken from the amazing achievement of the Greek runner Pheidippides, who ran over twenty-six miles in four hours, taking news to Athens of the Persians’ defeat at the Battle of Marathon in 490 BC.

Formula One, also known as Formula 1 or F1, and currently officially referred to as the FIA Formula One World Championship, is the highest class of auto racing sanctioned by the Fidiration Internationale de l’Automobile (FIA). The ‘formula’ in the name refers to a set of rules that all participants and cars must comply with. The F1 season consists of …

A Copper Name-Plate For The House You cannot go into a shop and buy a name-plate for fixing to your front gate, and it costs quite a bit to get one made specially. You can, however, make one yourself, and if you do it to your parent’s satisfaction what more could be desired? You will want, first of all, a …

These are robots that look like Volkswagen Beetle cars, only they have legs instead of wheels. They can scuttle across spaces and have the potential to help put out forest fires. They can be used in areas which can be quite dangerous for humans. These robotic Beetles were developed by the University of Magdeburg-Stendal in Germany.

It is piece of cartilage and its protective coating that separates the two nostrils in the nose. In some people it can get bent and thus irritate the nose linings. It can be removed by simple surgery.

Making a Ladder Most boys like to make a ladder at some time or other in their careers, and you may be contemplating the construction of one, at the moment. There is nothing difficult about putting a ladder together, if you do not mind it being a triffle heavy. You will want two pieces of wood, square in section, with …

Falling stars have been a source of curiosity for men for thousand of years. But today with the advancement in science we do not call them stars. They are called “meteors”. They are small and solid bodies, traveling through space which may come into contact with earth’s atmosphere. When they enter our atmosphere, they leave a fiery trail of light. …