I think many people remember the famous film by Leonid Gaidai “Operation Y and other adventures of Shurik”, how they passed the synchrophasotron exams there. This is exactly what this collection of miniature devices for passing exams will be about.

In the article I will tell you about two designs from a regular web camera: the first is a counterfeit banknote detector, the second is an infrared camera that sees in 100% darkness.

No, we didn't make a mistake. Not copper sulfate—you’ve probably received these crystals more than once—but real metallic copper.

Summer comes, and with it mosquitoes and all sorts of other midges appear. Everyone knows how annoying mosquitoes are, especially at night. The proposed device allows you to protect yourself from all insects, and if you increase the frequency of the generator to ultrasound, then also from dogs.

It turns out that making a stylish leather case for your player yourself is not so difficult. We will need: 1. A little leather, the thicker the better 2.Thick cardboard or plywood 4. Awl 5. Blunt metal object 6. Water 7. Sharp knife.

Although the sale of hydrochloric acid is limited and can be difficult to buy at retail, anyone can easily make it from polyvinyl chloride, one of the most common plastics. PVC is used to make wire sheaths, toys, and many household items.

An article about how to make a vibration mouse for computer games. It will add realism to your gaming world and allow you to get much more pleasure from games. And CS 1.6 will appear before you in a new form!

In various consumer electronics, protective glass is often made from plexiglass. This is a good material, if not for one of its drawbacks - scratches appear on it easily. We tried to describe the most accessible polishing technology

The air-hydraulic model is one of the simplest types in rocket modeling. It is characterized by simplicity of design and operation. This model makes it possible to conduct many different experiments and, most importantly, get acquainted with the action

It turns out that the laser system is just as simple. Here I will tell you how to make a laser machine called a Spirograph!

Another rather dangerous experiment. Under no circumstances do this alone. Only under the supervision of professionals. You connect the lead from a pencil to a car battery, and you get a flashlight.But if you connect it incorrectly, everything can burn out.