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

It so happened in old village houses that even the most unnecessary and completely outdated thing could never be thrown away, but was carried away “out of sight”, in the hope that it would come in handy someday. And it came in handy. From the old

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

We make a simple sound amplifier with our own hands. We will need the following: 1) Coil: L1 5 μH 2) Resistors: R1, R3 2.2 kOhm; R2, R5 22k; R4 680 Ohm; R6 2.2 ohms; R7 10 ohms. 3) Capacitors: C1, C4- 4.7 uF-25V; C3-22 uF-25V; C3-22 uF-25V; S5-0.47

In this article I will talk about how you can simply make an inverter for LDS. I needed it to check the backlight of the lamp matrices of laptops. In such matrices, an ordinary gas discharge lamp of a very small

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

Not so long ago I bought a bite signaling device for a fishing rod. After 2 days of work, he broke down. It turned out that the piece of iron, which was stretched by a fishing line, broke. This piece of iron pressed on the contacts, closing the circuit. Throwing such a thing was a pity, and the sound

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 cannon 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

A couple of weeks ago, an LED panel for indoor lighting was assembled and it was decided to assemble an acoustic switch for it and today I want to consider perhaps the simplest circuit of an acoustic switch.

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

Today on the Internet you can find many schemes of radio transmitters. For many months, almost half of them were repeated, but not a single circuit showed the required parameters. Long-range schemes met, but stability left much to be desired

We have on sale lamps with pins and with an e-27 socket. The price with pins 130r and 195r and with a base 250-300r and 500-550r. I decided why should I overpay for each light bulb from 120 to 350 rubles. If the plinths can be taken for free, as much as you want from burnt

I present the next color music to your attention, or rather the volume level indicator will say, since it is a column of LEDs that turn on one after the other, depending on the output signal of the audio amplifier. For those

Surely many would like to have a 5.1 audio system at home but for the frequent prices of such amplifiers are quite large. I’ll tell you how simple and not very expensive to assemble a 4-channel amplifier for such a system. Rummaging on the Internet, I chose the most

Here's a toy soldered by my amateur radio father. What is this tricky device? This is theremin. A bit of 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

This is perhaps the most popular simple and common radio bug or radio microphone circuit. A minimum of detail and a minimum of time is required to build this baby. Through the use of a microphone from Chinese products, the sensitivity of this

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

In this article I will talk about how to make Kachrov Brovina relatively small power with the same set of parts. So what is a “kacher”, in essence it’s like a Tesla coil, which I’m a resonant transformer with

In this article I will tell you about how to make a simple and reliable contactless key. To begin, I will explain what this key is, the bottom line is that there is a transmitter on the battery and a receiver built into the device we need

Everyone can do a very simple, and most importantly necessary in the household, simple detector of hidden wiring. All parts are available or interchangeable with similar ones. The power source is dead batteries or something similar.