Electronics. Page 2

Can a flashlight shine without batteries? Of course, if it is an induction flashlight, or as it is also called, a Faraday flashlight. Why Faraday? Because it was he who discovered the phenomena of electromagnetic induction, that is, the occurrence of electric current in

Soldering of aluminum is carried out using tin-lead solder. But the process is complicated by the fact that aluminum is difficult to tin. Most often, aluminum flat surfaces or aluminum wires to aluminum or aluminum to copper are soldered. Cause bad

Before protecting the copper soldering iron tip, it must be tidied up and tinned. As you know, the purer the metal, the slower it oxidizes. The manufacturer decides for himself what purity of copper he used, and we cannot influence this.

It is known that electric machines have the principle of reversibility. It is quite possible to make a generator from an old electric motor and use it for your household needs.This article talks about how an old induction motor and

CDs or cassette car radios can last for a very long time, despite the fact that music media are already outdated. To breathe life into an old radio, just install a Bluetooth module in it. And give the device a new

Everyone has seen small smoke machines in dance clubs, bars and discos. They do emit a nice puff of smoke, but their output is low - barely enough for a small hall. We will make a smoke monster with a power of 4.5

This article answers the question in which cases should an RCD be installed in a distribution board, and in which a DIF machine should be installed. And are these devices necessary in principle? Maybe we can make do with old Soviet traffic jams?

When the heating in the apartment is not turned on, and city utilities do not even plan to do this in the coming winter, various types of homemade heaters are used. Why not use a central heating battery for this? After all

How to Make a 12 Watt LED Mini Flashlight. Nothing is impossible. Yes, of course, you can buy such a flashlight. And it will be beautiful, shiny and inexpensive. But this is not our method. Only by yourself, with your own hands, from scrap materials. Let's start!

When renovating an apartment, sometimes you can find an interesting surprise from the previous owner or builders in the form of a wire sticking out of the wall. Where does this unknown cable come from and where does it go? Is this wire live now or not? Quite

We will talk about restoring the functionality of LED light bulbs, which last exactly as long as they are covered by the warranty. What happens after? One of their LEDs burns out and the bulbs are usually thrown away

Very often, many of us, when going on business or for a walk, take a small external charger with us. If things happen in a hurry, then not everyone at this moment checks the charge level in the phone, and the readiness of the charger itself

This design is interesting because no complex devices are used for its operation: computers, GPS trackers, etc. The device does not require batteries or any other power source to operate. And the spare parts and components for its manufacture cost

LED signal strength indicators have been around for decades. In middle-class sound-reproducing equipment, they have almost completely replaced other level control devices: pointers, LCD matrices. The reason is simplicity and

Lamps, flashlights, ARBs and table lamps, free-standing and stationary, ordinary and outlandish, there is so much choice now. However, not a single person would refuse to have in his interior a thing that no one else has, which

Another story about how to make a device for lighting effects without using controllers and microprocessors. However, some radio components will be used in this product. But first things first. A device that will

Most radio amateurs, when testing their homemade products powered from the network, use an incandescent lamp as a fuse. For example, if you need to check, say, a switching power supply, then the first switching is done

Such a mini-pump can be useful when performing small jobs in a home workshop, when you need to pump something or wash small parts. Any adult can make it; all you need is care and attention.

How many remote controls do you have at home? Definitely not alone. TV remote control, air conditioning remote control, lighting remote control... Perhaps something else. And trouble can happen to each of them - it stops working. Three

Car radios in cars manufactured more than 10 years ago are not equipped with a Bluetooth system. A simple modification of such sound-reproducing devices will allow you to listen to music tracks broadcast from a smartphone. One condition - the radio must

Everyone knows (and those who don’t know, find out now) that silicon is used to produce the main types of solar cells. This is a semiconductor that is widely used in the manufacture of radio-electronic components. For example, in production

To enjoy the lighting effects, you don’t have to be an electronics expert or understand transistors, microcircuits and controllers. A workable design capable of reproducing various lighting effects can be made based on

Unexpected use of an old push-button telephone. Several parts cut out of cardboard, an LED lamp and a lens. That's all you need to make a projector. Details below.

When buying a Chinese Bluetooth speaker from an online store, you should be prepared for any surprises in terms of the technical condition of the device. In general, this applies to any gadgets made by brothers from the Middle Kingdom. Although, in general, recently