The network has repeatedly hosted options for using a laptop adapter as a charger for a car and other batteries, using a lamp as a load resistance. You can, of course, and so, but much

To create the effect of sequentially changing the RGB LEDs of the tape, it is proposed to assemble a simple electronic control circuit. The voltage from each of the three outputs of the self-oscillating ring multivibrator is alternately supplied to the input R, G or B

KT315 is the legendary domestic transistor, copies of which are present in large numbers at each amateur radio amateur. Not surprisingly - this is the very first mass-produced silicon transistor, you can find it in almost any

The sun is an inexhaustible source of energy, and also environmentally friendly. Nowadays it is not a problem to extract this very energy, both for individual use and on an industrial scale. Solar modules come in a wide variety

If you thought it was some kind of practical joke or joke, then you were mistaken. This flashlight really only works on water and on nothing else. Each of you will be able to repeat it and make yourself the same, especially since the scarce elements in

The device boron cars are not the most difficult; engine and start button in the housing. But bor machines are of different types. It all depends on the manufacturer. Many manufacturers also mount a button to reduce speed. This is not an electric button, but a clean one.

In modern times, we are having more and more electronic devices. Smartphones, tablets, smart watches, MP-3 players. Charging them at the same time sometimes becomes a task. Of course, you can take an extension cord, for a certain number of outlets and organize

Great life hack for hams and more. Those who had to solder oxidized copper wires. Also, this cleanse method can be very useful for motorists.

Quite often, such a nuisance happens as a wire (cable) break near the plug. Especially often this happens with wires that are subject to constant vibrations and movements. For example, with headphones, chargers, multimeter probes and

It's no secret that the tablet’s battery is very energy intensive. Otherwise, how to “feed” such a giant, having a large screen, powerful speakers and no less powerful modules Wi-Fi, Bluetooth and GPS ...It’s very unpleasant that these devices break down

I have been using low-voltage soldering irons for a very long time. It so happened that I got a certain amount of them. They feed on safe 42 volts. Usually they are connected to a transformer, but I don’t have one in stock. I use for food

Every day, more and more radio amateurs use parts and components in their work SMD. Despite the sizes, it’s easier to work with them: you do not need to check the holes in the board, bite off long leads, etc. Master soldering SMD parts need

Hello! Being an amateur - an electronics enthusiast, I am sure that all we do is electronic toys - homemade products, or large projects, all from curiosity and laziness. Curiosity seeks to understand and comprehend the immense, not known,

This instruction manual will show you how to repair a liquid crystal display with dead rows or columns. An old phone is taken as an example, but the principle is also suitable for other devices. Usually the display is connected to the controller through a flexible

Not a single portable electronic device, be it a portable speaker for the phone, the phone itself, the player, etc. not complete without battery. The lithium-ion batteries with a nominal voltage of 3.7 volts are very popular now, they

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

When working with emery, there is always a lack of light. I close the garage light with my body and a shadow appears on the workpiece. Originally used a carry, even used a headlamp. Nevertheless, I decided to facilitate the task and make constant lighting.

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

Have you ever held a huge LED, the size of a human fist? Of course not, because there are none. I will show how to make such an original little thing with my own hands. This LED will look exactly like its small

Hello! This composition is on my table. And what do you think is all this for? Yes, yes, I decided to assemble a night vision device. Say to watch owls at night. It seems to me very interesting.

Powerful over 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 for 1,000 hours like ordinary incandescent lamps. Also led modules

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

Hello! It is quite possible to make the simplest desulphator of old and unnecessary things in about 15 minutes, unless of course you know what and what to do. Any normal radio amateur, for any, has a lot of all kinds of electronic trash. And if you scratch on

Induction heater allows you to heat the metal up to redness, 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. AT