DIY electronics. Page 3

This instruction will clearly show how to repair an LCD display with dead rows or columns. An old phone is taken as an example, but the principle is also suitable for other devices. Typically the display is connected to the controller via

Not a single portable electronic device, be it a portable speaker for a phone, the phone itself, a player, etc. can't do without a battery. Lithium-ion batteries with a nominal voltage of 3.7 volts are now extremely popular; they

Budget car amplifiers made in China, as a rule, are not particularly reliable. Although they are assembled according to traditional schemes, which are also used in devices of serious manufacturing companies, the “Chinese” often save on

When working with emery, there is always not enough light.I cover the garage light with my body and a shadow appears on the workpiece. Initially I used a carrier, even used a headlamp. I decided to make the task easier and make permanent lighting.

Having a very energetic dog that runs without a break after the ball, we decided to use this by making such a device to save some of the energy while jogging. We will make a keychain for the neck with an LED. In the morning, on a walk, it will charge, and

Have you ever held a huge LED in your hands, the size of a human fist? Of course not, because they don't exist. I'll show you how to make such an original thing with your own hands. This LED will look exactly like its small one

Hi all! This is the composition lying on my table. And what do you think is all this for? Yes, yes, I decided to assemble a night vision device. Let's say, to watch owls at night. I find this very interesting.

Powerful, ultra-bright LED light sources have now become popular and available. The advantages of LEDs are that their service life is much longer - up to 20,000 hours, and not 1000 hours like conventional incandescent lamps. Also LED modules

Quite often, residents of apartment buildings need to attach a picture, hanger, shelf or some other piece of furniture to the wall of their apartment.To do this, mark a point on the wall and drill a small hole

Hi all! It is quite possible to make a simple desulfator from old and unnecessary things in about 15 minutes, if, of course, you know what to make and from what. Any normal radio amateur has a lot of all kinds of electronic junk. And if you scratch

An induction heater allows you to heat metal until it turns red without even touching it. The basis of such a heater is a coil in which a high-frequency field is created, which acts on a metal object placed inside. IN

Old push-button mobile phones are long outdated and almost out of use. However, there are many ways to give such a phone a second “life” rather than sending it to scrap or a landfill. One of these ways is to put this miracle of the 90s into

Many sound-reproducing devices, whether tape recorders or amplifiers of the end of the last century, were equipped with a dial indicator on the front panel. His hand moved to the beat of the music, and although this had no practical significance,

The article is devoted to the possibility of starting a three-phase asynchronous motor with a power of 250 W from a 220 V network not using a starting capacitor, but using a home-made starting electronic device. Its scheme is very simple: on two

An external battery that suddenly fails is not a reason for frustration, especially if only its microcircuit is damaged. Of course, this is the most important part in this device, but if the batteries are not damaged (in many such devices

Thinking about another homemade product, I realized that there is no strong Powerbank. The idea of ​​a structure in a pipe was immediately formed. But I didn’t want to take a PVC pipe. Soldering it is not a problem, but it’s somehow handicraft. As always, I came across an old laser cartridge just in time.

There are situations when the charger for your phone is broken, and you urgently need to charge your device. But don't despair. If you do not live alone, then the problem can be easily solved. Any other phone will be suitable for charging the battery

You can get a three-phase voltage of 380 V from a single-phase 220 V in your garage quite simply. This will not take much time; the entire circuit can be connected in about 5 minutes without unnecessary complexity. For example, you need to start a powerful engine 3

This portable charger (Power Bank), unlike all manufactured models, produces not only 5 V DC, but 220 V AC, which is very advantageous and can be used in a wider range. Power - 60 W, which is for

In everyday life, solid-state relays are increasingly taking their place; they are simply not replaceable when the load is turned on and off very often and ordinary electromagnetic relays simply cannot withstand mechanical loads, wear out and break. TO

If you have an old or broken automatic washing machine, you can remove from it a good and very necessary thing - a water pump (pump). It is supposedly located at the very bottom under the drum and serves for pumping

Keeping an electric soldering iron clean and tidy is not a difficult task. However, along with a soldering iron, we always use consumables such as tin-lead solder, soldering flux, rosin, soldering oil and similar accessories.

Solid state relays have gained popularity recently. For many power electronics devices, solid state relays have become essential. Their advantage is a disproportionately large number of operations compared to electromagnetic ones

After I learned this method of incredibly quickly cleaning a soldering iron tip from carbon deposits, the question immediately appeared in my head: “Was it possible to do this?” Before that, like most radio amateurs, I took sandpaper and manually cleaned off the carbon deposits from