He sat one evening with a book in his hands and a crazy idea came up. Column speakers have become boring. So I decided to collect an unusual column, not like everyone else. It can be taken in nature or used in the garage, in the country. Found an old one in the barn

Hello! It will be about how to make a fully mechanical converter from 12 V DC to 220 V AC. Converter power 50 W, output waveform - pure sine. In fact, the entire installation consists of

People who often use power tools sometimes encounter the following problem: the engine, whether it’s a grinder, a circular saw, a plane or other equipment, starts very abruptly. Such a sharp start is fraught with many troubles:

Everyone can assemble such a simple regulator. Knowledge of electronics is not required, since a ready-made Chinese module will be used, which can be purchased for a very small amount. With all this, the regulator is able to adjust the power

Cooling fans are now in many household appliances, whether they are computers, music centers, home theaters. They are good, they cope with their task, cool the heating elements, but at the same time they emit a heart-rending, and very

It is very difficult to do without a computer microphone now, you cannot use voice search without it, you will not be able to chat with a friend via video. However, not all computers have built-in microphones, and besides, they are often

If you decide to repair broken headphones, a bluetooth headset, or any other device that has a thin and small microcircuit, you will need a soldering iron with a thin sting. But sometimes it happens that this very sting, by virtue of

As you know, in addition to the visible light spectrum, there is also infrared radiation that is not perceived by the human eye. It is often used in remote controls to transmit various commands. An interesting fact is that

Until now, some people use hourglass to count small periods of time. Watching the movement of grains of sand in such a watch is very exciting, but using them as a timer is not always convenient. Therefore, they are being replaced

Sometimes one wants to create a bright light show at home, call friends, turn on louder music and plunge into the atmosphere of a disco. There are usually no problems with music and friends, but organizing color music can be quite problematic.

When you collect some kind of electronic homemade product, then you need a power supply to check it. There is a wide variety of turnkey solutions on the market. Beautifully decorated, have many features. There are also many self-made kit kits. I'm already not

In many modern audio systems, whether it be a music center, a home theater or even a portable speaker for a phone, there is an equalizer, or, in other words, a timbral block. With its help, you can adjust the frequency response of the signal, i.e. change quantity

Switching DC-DC converters are designed to both increase and decrease voltage. With their help, you can convert 5 volts with minimal losses, for example, to 12, or 24, or vice versa. There are also high voltage DC-DC

Almost everyone has the most common soldering iron with a copper sting. This simple and useful tool is necessary not only for specialists involved in radio electronics. On the farm, he is also often needed, for example, to solder two wires or

A full-fledged welding machine can be assembled from four microwaves. Find them in our time is not difficult, models may vary. The design is not complicated, you do not have to disassemble the transformer cores. Such a homemade welder is quite

Among radio amateurs, a very interesting device called the Brovin Kacher is very popular. With its help one can observe spectacular corona discharges, lightnings, plasma arcs. Many people on the Internet call a kacher coil

Another option is a simple, low-power, but very useful amplifier, which is based on the LM386 chip. Its maximum output power is 0.5 watts, which is enough to sound a small room. The pluses of the amplifier on

A mini drone - a quadrocopter on remote control can be very simple to make at home. You can use it for games and as a layout for studying the work of the drone. The design contains a minimum number of parts, and the construction will take 15 minutes

An excellent summer craft is to make a miniature refrigerator with low-voltage power. A variety of supply voltage (220 V, 12 V, 5 V) makes it possible to use such a refrigerator almost anywhere: in a car, office, home, etc. it

Now the market is full of chargers. Automata and not, with and without capacitance measurement. Most chargers are universal and can charge elements of any chemistry. Lithium ion and lithium polymer are increasingly being used in different devices.

It was based on an industrial AC induction motor with a power of 1.5 kW and a shaft rotation speed of 960 rpm. By itself, such a motor initially cannot work as a generator. He needs refinement, namely replacement or

Many craftsmen have a cordless screwdriver in their service. Over time, the battery degrades and holds less and less charge. Battery deterioration greatly affects battery life. Constant recharging does not help. In this

There are a lot of electric tools, especially of the last years of release, that are not equipped with a soft starter. Such tools are launched by a powerful jerk, which results in increased wear of bearings, gears and all others

Surely, most people in the bins are idle old hard drives. From it you can make the necessary and useful thing for sharpening knives, scalpels and other items - a miniature grinding machine with a wheel speed control.