Switching DC-DC converters are designed to both increase and decrease voltage. With their help, you can convert 5 volts with minimal losses, for example, to 12, or 24, or vice versa. There are also high voltage DC-DC

Almost everyone has the most common soldering iron with a copper sting. This simple and useful tool is necessary not only for specialists involved in radio electronics. On the farm, he is also often needed, for example, to solder two wires or

A full-fledged welding machine can be assembled from four microwaves. Find them in our time is not difficult, models may vary. The design is not complicated, you do not have to disassemble the transformer cores. Such a homemade welder is quite

Among radio amateurs, a very interesting device called the Brovin Kacher is very popular. With its help one can observe spectacular corona discharges, lightnings, plasma arcs. Many people on the Internet call a kacher coil

A mini drone - a quadrocopter on remote control can be very simple to make at home. You can use it for games and as a layout for studying the work of the drone. The design contains a minimum number of parts, and the construction will take 15 minutes

Now the market is full of chargers. Automata and not, with and without capacitance measurement. Most chargers are universal and can charge elements of any chemistry. Lithium ion and lithium polymer are increasingly being used in different devices.

Many craftsmen have a cordless screwdriver in their service. Over time, the battery degrades and holds less and less charge. Battery deterioration greatly affects battery life. Constant recharging does not help. In this

There are a lot of electric tools, especially of the last years of release, that are not equipped with a soft starter. Such tools are launched by a powerful jerk, which results in increased wear of bearings, gears and all others

Surely, most people in the bins are idle old hard drives. From it you can make the necessary and useful thing for sharpening knives, scalpels and other items - a miniature grinding machine with a wheel speed control.

Simple design for determining the amount of fluid in any tank. Its huge plus is that it can be scaled to any size and vessel without any problems.For example, you have a rainwater tank and you want to

Modern man is used to using electric energy everywhere. It’s hard for us to imagine the lack of electricity on which most of our full lives are based. But have you ever wondered where it comes from? what

Sometimes such situations arise when you need to turn on the light in the room on and off at dawn every day at dawn, i.e. to imitate daylight hours in any closed room. This may be required, for example, when growing plants.

As you know, laziness is the engine of progress. How many different electronic devices people have developed in order to automate their lives - not to count. Automation has penetrated into all spheres of human life, and now sometimes we are even lazy

Many household electrical appliances, whether it be music centers, televisions, various lamps, turn on and off by pressing the same button. Pressed once - the device turned on, pressed again - turned off. In amateur radio practice

In everyday life, we most often encounter power supplies that lower the high voltage in the network to several volts, which are necessary to connect various devices. However, you can do the inverse transformation. Moreover, the scheme is completely uncomplicated.

Increasingly, SMD parts are used in production, as well as among hams. It’s more convenient to work with them, since you don’t need to drill holes for the terminals, and the devices are very tiny. SMD components can also be reused.

LEDs are built today anywhere - in toys, lighters, household appliances and even in office supplies. But the most useful invention with them is, of course, a flashlight. Most of them are autonomous and give out a powerful glow from small

Recently, such an activity as the search for various old coins, household items, and simply metal trinkets in the ground with the help of a metal detector has gained great popularity. In fact, what could be better than taking a morning walk

Hello friends, today we’ll talk about a home-made metal detector. At first I found a circuit on the Internet based on the NE555P timer chip, but it seemed to me too complicated for those who do not understand the notation on the radio circuits, and even put it on

Circuits using microcontrollers are gaining quite a lot of popularity on the Internet. A microcontroller is such a special microcircuit, which, in essence, is a small computer, with its own I / O ports, memory.

There are quite a few ways described on the Internet how to etch a circuit board in a solution of ferric chloride or hydrogen peroxide with citric acid. At the same time, another etching method is undeservedly forgotten - in a solution of ammonium persulfate. is he

I have a lot of different office equipment that is out of order. I do not dare to throw it away, and suddenly it will come in handy.From its parts, it is possible to make something useful. For example: a stepper motor that is so common is commonly used

When you want to amplify the sound of your device, be it a phone, a tablet. We turn the volume to the whole and the battery discharges the application. But it happens that the volume is not enough. At home, if there is a socket, speakers are used. Outside the house with a nutritional problem helps

I made myself a charger for four lithium-ion batteries. Someone will think now: well done and done, there are plenty of such on the Internet. And I want to say right away that my design is capable of charging both one battery and four at once. All