Everyone has probably burned their tongue at least once when eating hot food (this can happen when you are in a hurry or simply don’t want to wait for it to cool down). I propose to build an interesting fork (you can also use a spoon) with cooling.

So, an arc discharge is one of the most beautiful manifestations of electric current in gases. The electric arc is not only beautiful, but also useful, it is used for welding metals, also a huge temperature arises around the arc and the air becomes very

This indicator will promptly inform you that your battery is low. The main advantage of the proposed scheme is the clarity of operation. In other words, the signal LED lights up immediately without gradually increasing brightness.

The blocking generator is a generator of short-term pulses repeated at fairly large intervals of time. One of the advantages of blocking generators is their comparative simplicity, the ability to connect the load through

I present to your attention a very small Tesla coil on one transistor or Brovin Kacher. In a Tesla coil, a very high high-frequency alternating voltage is supplied to the primary winding, and in a kacher, the primary winding is fed by a collector

I am sure that most people use aspirin in limited cases. Such as headaches, fever, colds, etc. I dare to assure you that the use of aspirin is not limited to this.

Almost every radio amateur is faced with the problem of an overheated soldering iron, when the tip heats up more than necessary. Soldering with such a soldering iron is not very convenient: the solder begins to change color, becomes covered with an oxide film, the flux instantly evaporates or

There are many ways to make guitar pickups. I will tell you about the simplest one, which requires minimal knowledge in radio engineering.

This is perhaps the simplest battery charger you can think of. This kind of exercise has helped me out more than once in difficult situations. It is quite easy to assemble it on your own in the absence of a soldering iron and other radio elements.

There are times when a small-sized light source is needed or a light source is not at hand at all. This mini flashlight can come to your aid.It can be made in a short period of time from available parts.

When working with a soldering iron, many different compounds are released that float in the air, which naturally do not have a beneficial effect on human health. Most radio amateurs work in enclosed spaces and often literally breathe in these harmful pollutants.

Many novice radio amateurs often experience problems with drilling printed circuit boards. To solve this problem, I can recommend making this device. This is nothing more than a homemade mini drill for circuit boards. . .

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.

This is a simple sensor considering its sensitivity! I decided to use a small ionization chamber with a current amplifier built on a compound transistor as a sensor. This scheme works really well after 5-10 minutes,

Sometimes it is difficult to find the switch in the dark. To make this work easier, I propose to build a backlight into it. We will need three radio components and a little time. . .

I was prompted to write this article by the great interest of users in the design of a USB refrigerator assembled on a Peltier element. In this article I want to tell you in more detail about the use of this element in history, life and in practice.

A radio designer's household will always contain old diodes and transistors from radios and televisions that have become unnecessary. In skillful hands, this is wealth that can be put to good use. For example, making a solar battery with your own hands

As it turns out, quite ordinary things can be made into very unusual ones. For example, let's make a metal detector out of a radio receiver and a calculator. . .

Over its almost 300-year history of development, the microscope has probably become one of the most popular optical instruments, widely used in all areas of human activity. It is especially difficult to overestimate its role in teaching schoolchildren who learn

Another interesting variation on the theme of water cooling. This time in an external version with a large radiator, glowing fans and a blue water tank. You can do all this with your own hands, spending less than a thousand rubles.

The first circuit is the simplest multivibrator. Despite its simplicity, its scope is very wide. No electronic device is complete without it. . .

The amplifier is assembled on a TDA7262 chip, the power in stereo version is 35 Watt, and in mono version it is 80 Watt.

A very simple and effective shoe dryer is described here. Thanks to constant air convection, it dries shoes much faster than conventional dryers, and its small dimensions allow you to take them with you anywhere. . .

This small refrigerator will be a great help in the summer heat. He will be with you anywhere - at home and at work. . . .