DIY electronics

One day, for one of my projects I needed a powerful mosfet. A large current of about 500 Amperes had to be switched. And then the idea came to mind to make a separate transistor, modular, composite.

A broken vacuum cleaner is often used as a donor for valuable spare parts. One of its most useful parts for subsequent use is the speed controller. It can be dismantled, modified and used as a separate universal

An induction heater is a device that works using the magnetic properties of metals. Making it yourself is very simple. The device will be useful not only for studying the basics of electrical engineering, but also for practical purposes, for example,

Hi all! Once I wanted to throw a broken cell phone charger in the trash, but then the thought arose that maybe it could be useful for something else. I decided to disassemble the case and look inside. A classic scheme appeared before me

Another charging station. The guys from laser tag have updated their weapons staff. In this batch, the equipment is powered by a Li-ion battery. We received a task to make multi-channel charging for simultaneous charging of 20-25 weapons. Back to the rescue again

If you have a broken cell phone charger lying around idle, then you can use it to make one small but necessary homemade product. This is a simple voltage converter from constant 1.5 Volts to variable 220 Volts. Scheme by

A very simple LED flasher made entirely of transistors without the use of microcircuits. Implements the lighting effect of “running fire” using 5 LEDs. Made without the manufacture of circuit boards, simple hinged installation.

Once I needed a powerful transformer with bipolar power supply for a low-frequency power amplifier. I searched the bins and didn't find anything like it. Unfortunately, there was nothing like this for sale locally either. Here we caught our eye

It is almost impossible to make a reliable connection of wires without soldering. No matter what anyone says, but soldering wires is the most reliable, strong and durable connection of all possible. Unfortunately, it is not always possible to use it, say in

There is a strong and urgent need to drill a hole in the wall for a dowel. How can you avoid getting caught in passing wiring? In theory, you need to run to the store and buy an expensive tool to identify hidden wiring. It's good if he's in

Super capacitors (ionistors) are not afraid of critical currents, therefore they are often used in power units where peak currents occur for a short time. Taking this feature into account, you can build a welding machine using super capacitors

Many people have outdated stereo systems in their closets and garages. They are not used because cassettes have long since become obsolete, and CDs are also almost dead. Well, such a center is not provided for a flash drive. Although the entire audio path is

Supercapacitors have a colossal capacity compared to conventional capacitors. They also have a number of advantages over lithium-ion batteries, such as: they are not afraid of low temperatures and are not afraid of complete discharge. All this

Many LED bulbs and spotlights require 12V to power them, which requires you to buy or obtain a power source from somewhere. In fact, you can make it yourself using inexpensive parts.

Walk-through switches are usually used in long corridors or over long distances when you need to turn lights or electrical appliances on or off in one place and turn them on or off in another. In this case, you have to pull 3-wire and

A pulse soldering iron differs from a regular one in that it heats up almost instantly. It can be used within a few seconds after being plugged into the network. At the same time, the pulse option is economical, small in size and allows

We propose to assemble a simple circuit that clearly demonstrates the operation of a pulse counter with a built-in decimal decoder (decoder) - running lights. Refusal to manufacture a printed circuit board for this homemade product allows you to quickly assemble and launch

When soldering, it is very convenient to use solder paste. You can buy it or make it yourself. When heated, homemade paste flows better than factory paste. When soldering twists, it penetrates deeper, which ensures a reliable connection. Its application

This article will help you make something useful in everyday life, please yourself and your loved ones, and understand the basics of radio technology. It will take you very little time to make running lights. The necessary radio components can be purchased at

Very often, nickel-cadmium batteries refuse to charge at the moment when it is so necessary. They are especially capricious and do not tolerate neglect. They can fail for the following reasons: overcharging, being left in storage for too long

Do you have a couple of old telephones lying around in your closet? - There is no need to throw them away - make a very simple intercom out of them - an intercom. With it you can establish wired communications over hundreds and even thousands of meters. Everything is free and

The chemical power source that will be made in this master class has quite a significant power to obtain with it a voltage capable of powering 220 V network devices. Surely you have seen articles on the Internet where

One day I saw how the sun's rays, refracted in a glass bottle of water, create the impression of a magical light source. It seemed like there was a little sun in my bottle. I was so fascinated by this spectacle that I began to wonder how

Anyone who has an uninterruptible power supply (UPS) for a computer at home knows its one significant drawback, which costs its owner a pretty penny. This is, of course, the fragility of its batteries. Usually, if you're lucky, they live 3