Electronics. Page 18

When assembling a wind generator from scrap materials to generate free electricity, there is a difficulty in making blades that can respond even to weak gusts of wind. Without a good impeller, even a factory generator will not work

The topic of converting regular bicycles into electric bicycles is in increasing demand. The cost of parts for this is gradually decreasing in comparison with the prices that they had a few years ago. Therefore, for those who have long thought

I needed to assemble a power amplifier. I have S30 speaker systems. Initially I planned to install a ready-made amplifier board into the case. After rummaging through the bins, I found the TDA2616 chip. I removed it from a non-working TV.

There was a need for a 15 volt power supply. I wanted to use a transformer with a rectifier.Connect a stabilizer to them. This design will not be small. I remembered. I have a large number of power supply MFPs and printers. The block dimensions are not

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

When soldering miniature and complex microcircuits, it is difficult to do without a hot air gun. It does not involve direct contact with the solder, like a regular soldering iron, but melts it remotely by blowing hot air. They can be easily and quickly soldered into

Now we have to stay at home. Boring. The housing with the power transformer became free. While wondering what to do with it, I decided to do a long-standing project. Although I have a similar device, I will make more. I will make a charger for lead batteries

LED panels can shine no worse than car headlights or a spotlight on a lighthouse, but for this they need to be supplied with sufficient power. Using a bunch of LED panels and a large battery pack from old laptop batteries, you can

Every electronics engineer knows that an LED will not glow at a voltage below 2 V.Using this simple circuit, you can make an LED light from one 1.5 volt battery.

This is a very interesting and educational experiment that will appeal especially to novice electronics engineers. It will clearly and simply show how you can transfer electricity from one coil to another without wires, and almost without the electronics themselves. The

As a professional electronics repairer, every day you have to manually unscrew and tighten hundreds of screws. This takes time and effort, so if possible, you should get an electric screwdriver. You can buy it or make it yourself.

If you have a low voltage transformer and need to squeeze twice as much out of it, then there is no problem. Only 4 elements are needed to rectify the output voltage from it and at the same time double it. The scheme is as old as time, but

For light mobile equipment such as MP3 players and smartphones, there are many different models of power banks available for sale. But what if you work remotely and, say, on a trip, you need your laptop to work for as long as possible than

Motorcycles are many times more economical than cars, but refueling them with gasoline is not cheap. Reduce the cost of traveling on them, possibly replacing the internal combustion engine with an electric motor.This is an ideal solution for those who have their own

It would seem that in almost all circuits the transistor is the key element and few logical circuits can do without it. Now we will present to your attention a number of extremely simple electronic circuits that lack not only

To manually solder even a small electronic board into components it will take at least 20 - 30 minutes. Now you will see how to speed up this process several times with the help of a small device that everyone can make for themselves. At

Sometimes for some devices or machines it is necessary to use an indicator that would blink and attract attention, and most importantly, would work without additional power directly from a 220 V network. Now you will see 2 diagrams of simple flashing lights, without

Let’s imagine a situation where you suddenly decided to go on a hike for a long time. A little later we realized that somehow in nature you need to charge your phone or tablet, but you’ve never had a power bank. What to do? If you have one lying around idle

Somehow I got an old but working generator. I decided to convert it into a BLDC motor. In the future I will use it for a homemade electric bicycle or electric scooter. In general, the engine is suitable wherever adjustable

A super powerful power bank with which you can power absolutely any household appliance for a long time. An electric stove, an electric kettle, any load up to 4 kW is not a problem for this power bank. It’s not at all difficult to assemble such a “beast”

The simplest, reliable short circuit protection, without logic electronics, transistors and everything else. LEDs are used for indication purposes only. This device can be used in low voltage circuits where there is danger

This not complicated night vision device is really easy to make and anyone can do it. And now I will tell you how to make it. Such a device can see even in complete darkness, and can also take photos or record videos. Such a device

Despite its size, this baby plays music loudly and powerfully, is controlled entirely via Bluetooth and has a built-in battery. Of course, unlike its brother - the car subwoofer - this is a full-fledged speaker system,

Somehow I needed a powerful power bank with which I could easily charge my gadgets for a whole week while on a hike. I couldn’t buy it in the store, since there are simply no batteries of such power on sale. And the idea to make powerful