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

This transmitter showed good quality of the transmitted music, so I recommend starting with this scheme. As practice has shown, an assembled generator on one transistor cannot, 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. After 10 minutes of unsuccessful attempts to start his car, he decided that it was necessary to purchase or make a charger himself. In the evening

With prolonged and intensive use, the remote control of the radio equipment begins to manifest a characteristic malfunction. The buttons on the remote control stop responding to pressing. This happens due to contamination of the contact pads of the board and rubber buttons, or

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

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 rechargeable batteries with a current of approximately 100 mA.

The Internet had only circuits on these microcircuits, but the assembled amplifier was never found. Operating mode AB, Supply voltage 10 ... 32 Volts, Stereo configuration, Operating temperature 0 ... 70 degrees. Such microcircuits can be found in modern TVs

The simplest jobs related to electricity are difficult to do without measuring tools. It is not necessary to measure the parameters of the electric circuit with a tester, in many cases it is more convenient to do with a universal probe that infects the presence of

Having decided to keep up with the times, and to save my money in the future, I decided to make some useful innovation. More precisely, to remodel lamps with fluorescent lamps into lamps with LED lamps. Service life is high, 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, in the lead role, we have today the STK series chip. Chips stk - hybrid chips that

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

Today we will build a simple mono audio amplifier on the TDA2003 chip. The TDA2003 chip can be dropped out of the old radio or bought on the radio market. The rest of the details as well. The amplifier is powered by 3-12 volts. The sound source may be a player

The article presents the design of a radio transmitting device with a range of up to 100 meters. Such a radio bug was built according to the three-point capacitive scheme (like all other known schemes), the components were carefully selected. Frequency doesn't swim like

The converter is made on the popular timer 555 series. The design of the converter is quite simple and can not cause difficulties even for beginner radio amateurs. The power of such a converter largely depends on the field

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 long please those whom you want to give pleasure. However, for such work we need

Kacher - a device that generates a high voltage (5000-20000 volts) of high frequency. Do not be afraid - you will not be killed by electric shock if you touch your hand, but nevertheless be especially careful when you make this art at home. Is not

This device was conceived recently, because of the continuous series could not work quietly. And a couple of days ago a good thought came to my mind! assemble a portable suppressor of television and radio channels. The device itself has a fairly simple circuit.

Recently, amateur radio amateurs have often and often used this technology to create amateur radio circuit boards. This technology is distinguished by its simplicity and reliability.

Perhaps the most difficult part of the design of amplifiers for supplying a subwoofer channel from the on-board network is 12 volts. There are a lot of reviews about it in different forums, but it’s very difficult to make a really good converter on the advice of experts, make sure

This is another article about a beginner amateur. Checking the performance 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 for beginner lovers

Recently, an old mobile phone inoperative fell into my hands. As a result, it was disassembled for parts. A train of an interesting form with smd components did not slip out of sight. As a result, without thinking twice, I decided to make a radio bug on a flexible board. For beetle

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

I present to your court the design of a frequency silencer. A fairly simple and 100% working circuit is designed to suppress television and radio signals. The device will be able to jam almost any TV channel (except the satellite of course) at a distance of up to 15

The design of such a radio bug is quite simple, practically does not need adjustment, and in the presence of all parts can be assembled in half an hour.This is a great option for a beginner who is just starting to learn and assemble simple radio circuits. In spite of