Electronics

Master classes:

How to solder aluminum reliably without flux

Using the proposed method, you can solder not only an aluminum wire to a copper wire, but also solder a hole in an aluminum pan with copper material. Let's start with the usual tinning of copper wire using rosin and tin solder using a soldering iron.

How to quickly find out the speed of an electric motor without a sign and disassembly

Often you have to deal with old electric motors that do not have labels with characteristics of power, speed, etc. Such an electric motor can be used as a drive. For example, when making emery you need

Useful tips for expanding the capabilities of your soldering iron and solder

Soldering a wire to a printed circuit board terminal without flux will be unreliable. The quality of soldering will increase significantly if flux in the form of rosin or acid is present on the soldering iron tip along with the solder.

How to make a foot switch with speed control and reverse

An electric engraver bought in a store at an average price usually comes with standard assembly and accessories; a housing with a motor, a collet or jaw chuck, and an AC power supply that matches the power consumption of the motor.

Ultra-simple level indicator without transistors and microcircuits

There are circuits of simple signal level indicators that do not contain transistors or microcircuits. They don't even require a power source to operate. And the time spent on assembly will not exceed 20 - 30 minutes. Although, to be honest, it will work out in the end

How to make 1 more powerful engine from 3 small ones

Of course, one powerful DC motor is not the sum of three smaller motors. Some things will have to be removed, others changed and something added. With some accuracy and attentiveness, even a senior schoolchild can cope with this work.

Active solder flux and solder paste from what was on hand

Two great life hacks to make soldering easier. Homemade fluxes that do not require expensive or scarce components for preparation. Only citric acid, Vaseline and solder. Anyone can repeat it.

How to make a mini thermal power plant for a fire. Lighting and charging gadgets far from civilization

The article discusses a method for generating electricity using burned fuel and water. “We know, we know,” the power engineers will say. “This is how we generate electricity at our thermal power plants: fire heats water, steam rotates the generator shaft...” “No!” - With

Without a PC and a printer: How to make a board using USSR technologies

Have you ever wondered how in Soviet times radio amateurs made printed circuit boards without the help of JLCPCB services, laser-iron technologies and auxiliary programs? The process is curious and exciting, so I propose to repeat what

How to make a wind generator from improvised materials

Make a homemade wind generator from available materials. Easily! And for this you don’t have to use expensive carbon fiber blades and a high mast. And we won’t even carry out engineering calculations. We just take it and do it.

How to assemble an off-road and powerful scooter

We will use a scooter frame that we assembled some time ago. To do this, remove one of the nodes from it. We bore the central hole of the driven sprocket on a homemade lathe and drill holes for the fasteners.

How to make a popular antenna from a cable for digital television

Operating experience and reviews indicate that this antenna can receive a reliable signal at a distance of up to 50 km from the transmitting tower. Despite its effectiveness, it can be done in just a few minutes, literally “on your knees.” From tools

How to backlight a multimeter display

Does your multimeter not have a backlight? Or is it not bright enough and the device is inconvenient to work with? We'll tell you how you can equip your Avometer with LED-based backlighting. The test sample is the popular 830 series tester. AND

How to make a socket with D/U (220V) for a room lamp

Sometimes, in the evening after work, sitting in a chair watching TV, after drinking hot tea with herbs, I begin to feel sleepy.A pleasant drowsiness spreads through your body, and you SO don’t want to get up to press the wall light switch. And so at this time

How to make an induction heater from an old energy-saving lamp

An old, broken energy-saving CFL light bulb can still be very useful. For example, for making the most interesting homemade product - an induction heater. And first, as always, a little theory.

Tired of changing batteries in your multimeter? How to transfer to a battery with a charging system

Are you tired of changing batteries in your gadgets? Then this post is for you. We'll tell you what needs to be done so that electronic devices can be charged from a standard power supply with a microUSB connector. To remake, let’s take the “ubiquitously popular” series multimeter

How to make an awesome “Radioactive Barrel” lamp

It will be doubly pleasant for a loved one, or even just a good friend, if the gift is made with your own hands, and not blindly bought at the first store you come across with cheap junk, just to get away with it. And for yourself, your beloved, such a thing in the interior

How to make an indispensably useful vacuum tweezer for SMD

Anyone who works with SMD elements knows that installing them on a board with ordinary tweezers is not always convenient. They are small and your hand gets tired if you work with a large number of components. There are so-called vacuum tweezers with mechanical

How to make an automatic LED lamp from an ordinary one

When darkness falls, you need to turn on the lights. In order not to do this manually every time, there are various circuits of twilight switches (photo relays). Today we will assemble one of these circuits directly in the body of the LED lamp.

How to make a Power Bank from disposable HQDs

“Power Bank” - also known as an external battery - will allow you to charge gadgets without connecting to an electrical outlet. And today we make a power bank with our own hands from an electronic cigarette. Why from her? The device includes a battery with a capacity of up to 1000

How to charge your smartphone with candle fire. Do-it-yourself thermoelectric power plant

In today's project we will charge a mobile phone with candle fire. To do this, we use thermoelectric converters, the operating principle of which is based on the Peltier effect. And first, a little theory.

Correctly setting up a SIM card will speed up the Internet, stabilize the signal and reduce battery consumption

There are a lot of instructions on the Internet for setting up a SIM card, mobile communications and Internet settings on a smartphone. Let's take a closer look and discuss one option that helps increase the speed of mobile Internet and improve the quality of communication. Your

Has your phone stopped charging? The very first solution to the problem

We will talk about how to solve the problem if your smartphone suddenly stops charging. The first reason to check is the contact in the power connector. This is the most common malfunction associated with charging phones. And in 90% of cases our

Heating using an electric motor of a washing machine

Let's consider the topic of magnetic heating. And first, a little theory. The effect of heating metals in an alternating magnetic field due to eddy currents was first studied back in the 19th century. Scientists Arago and Faraday studied this issue. And in more detail