Do it yourself

How to collect the largest Rubik's cube in the world?

The cube, designed by Oscar Van Devent, was officially able to assemble only two people in the world. It consists of 1539 parts, which means that the total number of possible combinations for it is 6.69 * 101054! Kenneth Brandon believes that he is the second person (after Aaron MacDonald) who was able to solve this puzzle

How to quickly make dry ice with your own hands

Dry ice is used to cool food during transportation and storage, as well as in research and development and various experiments. On an industrial scale, it is produced on carbon dioxide plants, and to make dry ice at home, it is enough to take only a carbon dioxide fire extinguisher and pillowcase, as well as protective gloves

Cellophane: the king of packaging and an accidental invention

The foundation of this story was laid by the British chemists Charles Cross, Edward Bevan and Clayton Beadle, who in the 1890s developed and patented a reliable and safe way to produce "artificial silk", which they called viscose. Natural cellulose was treated first with alkali and then with carbon disulfide, resulting in a soluble cellulose xanthate

Who invented the eraser and when?

After the opening of the New World, Europeans had many surprises. In his famous book De Orbe Novo (On ​​the New World), published in 1530, a Spanish historian of Italian origin, Pietro Martire d'Angier, noted that he saw natives playing with a ball of unprecedented elastic material that they extracted from the sap of local trees. Mu

9 life hacks with cling film that will come in handy for everyone

Protect your drink from spilling Life hack for those who have children. How often do they spill juice and tea on themselves when they drink from a glass without a lid? Regularly. Next time, wrap the container tightly on top with cling film, and for convenience, pass a drinking tube through it. So the juice will not “run out” of the glass, even if the baby turns it upside down. Th

How to make a railgun with your own hands?

As you know, a railgun is a weapon that uses electromagnetic forces to disperse a projectile. The projectile is part of an electric circuit moving between two contact rails, and for a shot a weapon needs a short-term supply of high voltage current - much more powerful than a household network can provide

What happens if you pour sugar into a gas tank?

In old films, all sorts of villains poured sugar into the gas tank to make the car owner dirty. It is clear that sweet gasoline is hardly useful for the engine, but the consequences usually remained a mystery. Well, the more pleasant it is to see how someone set up such an experience and checked what really happens

Steampunk in Detail: A Short Guide for Victorian Inventors

Steampunk is not only Victorian England, but also other planets, flying cities, parallel worlds Often fantasy takes the creators of steampunk too far, and the charm of old simple technologies is sacrificed to a heap of sophisticated mechanisms. Meanwhile, you can create new technologies, while remaining within the strict framework of the style - for example, come up with unusual movers or their combinations Among the creators of works in the steampunk style, you can find many people with an engineering education Drawing steampunk cars is pretty easy The main thing is to remember all the classic

Welcome to the safe: how professional crackers work

Immediately debunk several myths. Among the autopsy masters there are no and cannot be people with a criminal past, since crystal honesty is one of the most important requirements for a profession. Companies specializing in the opening and installation of locks and safes, most often do not hire new employees at all, bypassing the team formed from the very beginning

How to make a stand for your phone: 5 easy steps

Step 1: Take A Pair Of Office Clips Step 2: Put the “ears” of one clip into another Step 3: Position the resulting structure with your front facing you. Step 4: Bend the “ear” and simply place the smartphone in the formed groove. The stand is ready! Step 5: If you need to move the stand, it is not necessary to disassemble it - just use the support leg for movement

Homemade heat: a DIY chemical heating pad

Baking soda (sodium bicarbonate) very readily reacts with acetic acid, forming a salt (sodium acetate) and weak carbon dioxide, which immediately dissociates into carbon dioxide and water. All components and reaction products are completely harmless, and the gas-saturated mixture actively foams, making pies more magnificent and forcing schoolchildren to point their fingers in surprise

How to tie a tie according to a scientifically verified method: an ideal knot

Dr. Thomas Fink, a specialist in the forms of molecules of organic compounds, and Dr. Jung Mao, dealing with polymers, built a mathematical model for tying a tie, based on the principle of random steps on a triangular lattice borrowed from thermodynamics. Its essence is as follows. The standard starting position is the tie lies on the neck, the ends are crossed on the chest

Match Tank Battle: Explosive Confrontation

Matches, cardboard, glue, a lot of smoke and fire - everyone loves games with pyrotechnics accessible to everyone. But, probably, nobody has done such complicated crafts. Meet: the Abrams model was photographed in the field, where he will meet with rough terrain, wild animals, almost real jungle and formidable enemy

Primus: the history of the invention of a tourist burner

The first gasoline internal combustion engines did not have an electric ignition system, instead an open flame or a glowing candle was used - a red-hot tube or platinum wire. Thus, for the initial start of the engine, it was necessary to warm up the spark plug to a high temperature. To do this, they usually used a blowtorch - the recent (1882) invention of the Swede Karl Rikard Nyberg

How to make a do-it-yourself snake robot

At present, snake-like robots exist exclusively as prototypes, which in the future will play the role of scouts, rescuers and repairmen in those areas where it is difficult for a person to get. For example, the brainchild of engineers at Kongsberg Maritime and Statoil can be under water all day and night, rising to the surface only to diagnose the systems

Jeans were not invented by Levi Strauss!

In 1845, at the age of 16, Loeb Strauss, a native of Bavaria, with his mother and two sisters descended on American soil in New York, where the family was met by two older brothers. Loeb soon changed his name to Levy and was actively involved in the brothers ’family business - manufacture trade. With the beginning of the California gold rush, Levy decided to go to San Francisco, where in 1853 he founded the company Levi Strauss (10 years later renamed Levi Strauss & Co.)

How to build a portable Bluetooth speaker for 700 rubles yourself

At least that's what the Dutchman Bart Roosen did. He laid out his instructions on public display, but we could not resist translating it. Required Components - Bluetooth audio module - Bluetooth charger (micro USB) 5V 1A - amplifier 2x3W - 2 speakers 3W 4? - finger batteries (preferably more powerful) - capacitor: 100

How to make a bonfire using a battery

Naturally, the first thing that comes to mind is a magnifying glass, or just curved glass, or even a polished spoon - in general, in the presence of the sun, you can get fire using almost any reflective surface. And if it happens at night? And if it is cloudy, how often happens in dense taiga forests

How to control a helicopter: technology

The control knob determines the rotational pitch of the rotor. With its help, the pilot controls the helicopter roll and pitch. Working with the control handle while hanging is like balancing on the tip of a needle. Almost every action requires appropriate correction by other controls. For example, to increase speed, the pilot gives the handle away from him, tilting the car forward

How to build a greenhouse with your own hands: video guide

Any greenhouse starts with laying the floor, which in this case simply rests on the foundation of the transverse beams - you do not need to dig a separate hole for it. As an insulating material that will fit a wooden frame and at the same time let in sunlight, Bob chose sheets of plastic with an air liner that are easy to cut even with a regular knife

How to hide during a nuclear explosion: 9 tips

1. Anyone within a radius of 800 m from the source of the explosion will die instantly with a probability of 90%, and within a radius of 3, 200 m with a probability of 50%. Radiation spreads very quickly: if you are within a dozen kilometers of the site of the explosion, you have a few minutes to find shelter

How to quickly defrost meat without a microwave

If there is a microwave, the problem is solved, but be prepared for the fact that the meat will thaw unevenly, and "cook" at the edges: the picture is not the most attractive. In the meantime, it is possible to achieve complete and “accurate” defrosting of meat quite quickly and in a very simple way. Yo

Soft power: how to make silicone muscles yourself

Artificial muscles are good because they do not contain internal moving elements. This is another, rather radical, alternative to electric motors and pneumatics with hydraulics. Existing samples today are either polymers that are sensitive to voltage or temperature, or alloys with shape memory. The former require a rather high voltage, while the latter have a limited range of motion and are also very expensive

Homemade all-terrain wheels: through the mud with the breeze

In order not to slip on wet, muddy soil and make their way through the Russian impassability, the craftsmen of the Garage 54 channel built a simulation of a coating for an off-road rubber set from bolts and belts. We must pay tribute that even such a primitive option, apparently, feels confident in rough terrain

How to make a fountain without a pump?

The principle of the fountain of Heron The invention of the fountain is attributed to the Greek mechanic and geometer Geron of Alexandria, who lived in the 2nd century BC. It all starts with a central vessel of water. From it, water enters a second (empty) vessel, which is lower (relative to sea level) than the central vessel

How to make a wood burner do it yourself

To make a burner, you will need a pair of syringe needles, a wooden stick, thread, glue, a battery, a heat shrink tube, electrical tape and simple tools like a soldering iron and pliers.

We get electricity from lemon, potatoes and vinegar

Juicy fruits, young potatoes and other food products can serve as food not only for people, but also for electrical appliances. To get electricity from them, you will need a galvanized nail or screw (that is, almost any nail or screw) and a piece of copper wire. To fix the presence of electricity, a household multimeter will be useful to us, and a LED lamp or even a fan, designed for battery power, will help to demonstrate success more clearly

Vegetable artillery: how to build a potato gun

Our readers are very fond of weapons. Among them there are a lot of people who know firsthand the various types of weapons: designers, testers, the military, as well as those for whom sports shooting, hunting or studying weapons history has become a favorite hobby. However, among hunters to read and talk about weapons, there are also those who have never held anything worse than a water pistol in their hands

How to defuse an anti-personnel mine

The Cambodian guy calmly dismantles with the help of improvised means the anti-personnel mine found in the forest into pieces. His work is not particularly accurate, but he does everything quickly and confidently. As you can see at the end of the video, the mine was quite operational. It remains only to wish the sapper-lover good luck in his hard work, because, according to the International Campaign for the Prohibition of Anti-Personnel Mines (ICBL), every year thousands of people die from anti-personnel mines

The game of squares: showing the new desktop

At the disposal of the players So what do we have? Our playing field is a 20x20 square divided into 400 equal squares. Letters of the Latin alphabet from a to v are written along the horizontal edges of the field, numbers from 1 to 21 are written along the vertical ones. A letter and a number (for example, m5) define a game point located at the intersection of the corresponding vertical and horizontal