Today you will learn how to create jewelry using a rather unusual technique. This technique is called wire wrap art (among masters there is a simple name for it - wirework) and involves the creation of all sorts of gizmos by twisting

This transmitter showed good quality of transmitted music, so I recommend starting with this circuit. As practice has shown, an assembled generator on one transistor cannot; they stand in one place, without an additional cascade, constantly

Every motorist sooner or later has problems with the battery. I did not escape this fate either. After 10 minutes of unsuccessful attempts to start my car, I decided that I needed to purchase or make my own charger. In the evening

With prolonged and intensive use, radio remote controls begin to develop a characteristic malfunction. The remote control buttons stop responding to pressing.This happens due to contamination of the contact pads of the board and rubber buttons,

There are situations when it is necessary to solder aluminum products. But due to the fact that the oxide film covers the surface of the aluminum, the solder simply does not stick to it. Solders and fluxes have now been developed specifically for this purpose.

On one of the amateur radio sites I saw a circuit for charging portable Ni-Mn and Ni-Cd batteries with an operating voltage of 1.2-1.4 V from a USB port. Using this device you can charge portable batteries with a current of approximately 100

There were only diagrams on these microcircuits on the Internet, but I couldn’t find the assembled amplifier. Operating mode AB, Supply voltage 10…32 Volts, Stereo configuration, Operating temperature 0…70 degrees. Such chips can be found in modern TVs

The simplest work related to electricity is difficult to perform without measuring tools. It is not at all necessary to measure the parameters of an electrical circuit with a tester; in many cases it is more convenient to use a universal probe that infects the presence

Deciding to keep up with the times and save my money in the future, I decided to make some useful innovation. Or rather, convert lamps with fluorescent lamps into lamps with LED lamps. Long service life, saving

Today I would like to tell you about an amplifier which, in my opinion, is an excellent solution in terms of price-power-quality ratio. And so, today we have the STK series microcircuit in the leading role. stk chips are hybrid chips that

I offer a computer fan control system that is easy to manufacture and easy to use. The system has 3 positions: - disabled; - low noise mode; - maximum mode.

Today we will assemble a simple mono audio amplifier using the TDA2003 chip. The TDA2003 chip can be removed from an old radio or bought on the radio market. Other details too. The amplifier is powered by 3-12 volts. The sound source can be a player

The converter is based on the popular 555 series timer. The design of the converter is quite simple and cannot cause any difficulties even for novice radio amateurs. The power of such a converter largely depends on the field used

The best gift, as you know, is the one you made yourself. What will be described in this article is distinguished by its originality and will delight the one you want to please for a long time. At the same time, such work requires

Kacher is a device that generates high voltage (5000-20000 volts) of high frequency.Don't be afraid - you won't be electrocuted if you touch it with your hand, but still be especially careful when making this craft at home. Is not

Recently, radio amateurs are increasingly using this technology to create boards for amateur radio designs. This technology is distinguished by its simplicity and reliability.

Perhaps the most difficult part of amplifier design is powering the subwoofer channel from the on-board 12 volt network. There are a lot of reviews about it in various forums, but it’s very difficult to make a really good converter using the advice of experts, check this out

This is another article dedicated to a novice radio amateur. Checking the functionality of transistors is perhaps the most important thing, since it is a non-working transistor that causes the failure of the entire circuit. Most often among novice amateurs

Good afternoon dear radio amateurs. Each of you at least once in your life wanted to assemble a Gauss gun, in other words, a Gauss cannon. Today we will consider an option that is perhaps one of the simplest schemes for implementing the project. The main part of the Gauss gun -

Surely many would like to have a 5.1 audio system at home, but the prices for such amplifiers are often quite high. I’ll tell you how simple and not very expensive it is to assemble a 4-channel amplifier for such a system. After searching the Internet I chose

This is the kind of toy my father, a radio amateur, soldered. What kind of clever device is this? This is a theremin. A little history, of course, needs to be told. The first theremin was created in 1908 by the Russian scientist and musician Theremin, from where he got his

I want to demonstrate my creation, if you can call it that. In the past it was a telephone, now it is also a full-fledged telephone, only in a slightly modified form and with a fair amount of weight added... The idea to make it came spontaneously.

Winter is in full swing outside - it's time to take up winter sports. And one of the most popular entertainments among both children and adults is ice skating. Have you ever had such a desire to become more noticeable on the ice?

Now I will tell you how to make an “Ionophone” or as it is also called “singing arc” with your own hands. Actually, from the names you can already guess that the ionophone is a source of sound. The sound in this device comes from a burning arc, the timbre