Electronics. Page 38

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

It just so happened in old village houses that even the most unnecessary and completely outdated thing could not be thrown away under any circumstances, but was carried away “out of sight”, in the hope that it would come in handy someday. And it was useful. From the old

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

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 22kOhm; R4 680 Ohm; R6 2.2 Ohm; R7 10 Ohm. 3) Capacitors: C1, C4- 4.7 uF-25V; S3-22 uF-25V; S3-22 uF-25V; C5-0.47

In this article I will talk about how you can simply make an inverter for LDS. I needed it to check the backlight of laptop lamp matrices. In such matrices, a conventional very small gas-discharge lamp is installed as illumination.

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

Not long ago I bought a bite alarm for a fishing rod. After 2 days of work it broke. It turned out that the piece of iron that was being pulled by the fishing line had broken. This piece of iron pressed on the contacts, completing the circuit. It was a pity to throw away such a thing, and the sound

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 -

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

We sell lamps with pins and with an E-27 base. The price with pins is 130 rubles and 195 rubles and with a base 250-300 rubles and 500-550 rubles. I decided why I should overpay for each light bulb from 120 to 350 rubles. If you can take free socles as many as you want from burnt ones

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

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

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

In this article I will talk about how to make a Kacher Brovina with relatively low power and the same set of parts. So what is a “kacher”, at its core it is similar to a Tesla coil, which is a resonant transformer using

In this article I will tell you how to make a simple and reliable version of a contactless key.First, I’ll explain what this key is, the point is that there is a transmitter on a battery and a receiver built into the device we need

Everyone can make a simple hidden wiring detector, and most importantly useful in the household. All parts are available or replaceable with similar ones. The power source is dead batteries or something similar.

This simple, and most importantly necessary device for work can be made by anyone at home with their own hands. It will take no more than 15 minutes, but working with a soldering iron will be beneficial and convenient. . .

This programmer is one of the simplest and most common. It contains a minimum of details and is easy to replicate. . .

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.