Do it yourself - with your own hands. Page 221

There may be a need to monitor the presence of current flowing in a circuit in two states: either present or not. Example: you are charging a battery with a built-in charging controller, connected to a power source, but how to control the process? Of course you can

Nowadays, everyone wears jeans - from grandparents to grandchildren and very young children. We bought it, wore it, then the trousers frayed (usually “in one step”) - we buy new ones. The most beautiful part of the jeans remains practically new. Embossed

Small chocolate bars for children can turn into a great gift for a child. Children are not interested in gifts such as money; it is better to exchange money for sweets in the store and make a kinder cake with your own hands. In terms of money

From old things that look not quite worn out, but are not used, you can make a new and beautiful thing with your own hands.For example, you can make a decoration for your home or car, a keychain or a Christmas tree toy. Or you can make something beautiful

A simple induction heater consists of a powerful high-frequency generator and a low-resistance coil-circuit, which is the load of the generator. A self-excited generator generates pulses based on the resonant frequency of the circuit. As a result

This article is something every motorist needs to know. Winter is coming very soon and many owners of a car with an old battery will be in for a surprise: when attempts to start their steel horse will not be crowned with success. The result will be

An original and perfect look cannot be created without stylish accessories. But the prices for them are so high that not everyone can afford to buy the bracelet they like or the right bow tie. However, this is not a problem, because any accessory can be created

I'll show you a simple and funny chemical experiment. We used to make it at school, just take salt and grow salt crystals. In this same example, we will take sugar and grow crystals from it. This will be a lollipop, which at the end you can

The simplest computer microphone is a Chinese capsule connected to the input. This capsule microphone is also powered by the computer input. It consists of a condenser microphone with a field-effect transistor amplifier.The sensitivity of such

A dahlia made of satin ribbons using the kanzashi technique is an exquisite decoration that can be used as a decoration for a hairpin/elastic band, attached to the chest as a brooch/boutonniere, or sewn onto a belt as a festive element. Regardless

A solar water heater is also called a solar collector. It serves to heat running water. The simplest solar heater is a barrel painted black and filled with water. Black color absorbs solar energy better

Gradually, lighting devices are switching to LED lamps. This did not happen immediately; there was a protracted transition period with the use of so-called housekeepers - compact gas-discharge light bulbs with a built-in power supply (driver) and a standard

There is very little left before the start of the New Year and it’s time to think about the festive outfit and hairstyle. Recently, it has become very fashionable to decorate your hair with flowers, but they are not cheap. In the master class we suggest making an orchid flower on a stiletto heel

How tightly Li-ion batteries have entered our lives. The fact that they are used in almost all microprocessor electronics is already the norm. So radio amateurs have long adopted them and use them in their homemade products. I contribute to this

This decorative felt cactus with a bright flower can be a wonderful decoration for your table. It can also be used as a pincushion. Making a cactus in a pot requires minimal sewing skills.

Today I will show you how to make a simple lamp for the garden, gazebo, veranda. This summer garden lamp has a simply stunning look and adds coziness and mystery to wooden structures. A very simple design, literally “penny”,

Such a shelf will fit perfectly into the middle of a bare wall, remove the appearance of emptiness and make your home more comfortable and functional. You can put books, photo frames, various figurines and much more on the shelf. The shelf has zoning, as a result you can

Sometimes it happens that we stop wearing something because of broken fittings or a single spot, but in the most visible place. It would seem that the fabric is still good, but what can you do? Of course, the lock can be replaced at the nearest workshop, and

Here is a simple scheme for automatically turning on the fan and controlling its speed depending on the temperature of the sensor. This simplest circuit, consisting of only two elements, can be used in your amplifiers, power supplies, computers and

We all remember very well the magical children's books with three-dimensional images.Why not use this technique when making a New Year's card? With a small amount of time, simple equipment and with the help

An apple tree is a decoration for any garden. With proper care, the tree will delight you with an abundant harvest of excellent fruits. Experts recommend watering the apple tree at least 4 times per season. If there is a drought, it is not easy to water the tree. Dried soil does not absorb well

There is a strong need to make the LED blink to enhance attracting a person’s attention to the signal. But to make a complex circuit there is simply no time and space to place radio elements. I'll show you a diagram consisting of just three, which

Even from the simplest things, which we do not pay attention to and consider garbage, we can make something worthwhile, unlike anything else. If, for example, you combine an ordinary cardboard box that was already going on a trip to the trash

This delicate lace choker will be an excellent accessory for a schoolgirl. He's nice, not vulgar. The lace itself is very similar to that used for sewing school uniforms. But! It is perfect to wear with both a tracksuit and a dress.