Electronics. Page 21

I travel by bicycle very often. And I often have problems charging my cell phone, since it’s difficult to find sockets when traveling. Once I saw that they were selling small wind generators for bicycles that generate

Sharpening a knife is not a quick task and requires special attention and caution. One might even say that this is a rather tedious task. But some people treat this process very carefully and approach it with all their soul and responsibility. And time

If you have a broken cell phone charger lying around idle, then you can use it to make one small but necessary homemade product. This is a simple voltage converter from constant 1.5 Volts to variable 220 Volts. Scheme by

Sometimes electronics need high voltage for various purposes.This is not so difficult to do if you make a homemade step-up high-voltage transformer capable of delivering 30 kV from the usual 6 V.

A very simple LED flasher made entirely of transistors without the use of microcircuits. Implements the lighting effect of “running fire” using 5 LEDs. Made without the manufacture of circuit boards, simple hinged installation.

Making a powerful step-down transformer for various needs is not that difficult. To do this, you will need parts of the core of a pair of old non-working speakers. The main advantage of a homemade transformer is that you yourself can initially set

The housings of power plants, radio equipment, electrical appliances and other similar products must have perforations for ventilation or cooling, otherwise they may overheat and fail due to the heat generated. Making blinds is not difficult and there is no need to

You can make a mini cordless soldering iron yourself in literally 15 minutes. Put it in your pocket and go soldering where there is no electricity. The main heating element is a 4.7 Ohm resistor. The battery is an 18650 series element.

Once I needed a powerful transformer with bipolar power supply for a low-frequency power amplifier. I searched the bins and didn't find anything like it. Unfortunately, there was nothing like this for sale locally either.Here we caught our eye

With this simple three-transistor detector, you can easily determine whether a cable or installation contains life-threatening voltage. For example, you turned off the electricity in the apartment. And to make sure that all wiring

It is almost impossible to make a reliable connection of wires without soldering. No matter what anyone says, but soldering wires is the most reliable, strong and durable connection of all possible. Unfortunately, it is not always possible to use it, say in

There is a strong and urgent need to drill a hole in the wall for a dowel. How can you avoid getting caught in passing wiring? In theory, you need to run to the store and buy an expensive tool to identify hidden wiring. It's good if he's in

How to connect wires quickly, reliably and without a soldering iron? For example, in a car. You can, of course, use regular twisting in combination with heat-shrink tubing, but this method will not be reliable. Now I will show you how to do it from a regular segment

Super capacitors (ionistors) are not afraid of critical currents, therefore they are often used in power units where peak currents occur for a short time. Taking this feature into account, you can build a welding machine using super capacitors

Has your hand drill burned out? There is a simple way to restore it and, as it were, simultaneously convert it to a constant voltage of 12 V. It is also quite possible to convert an ordinary working drill to 12 V, not necessarily broken, it just happened that way. Basically everything

A very funny, cheerful and simple experiment that clearly shows the power and effect of electromagnetism. An electric train will be made from a battery that can quickly travel through a tunnel made of copper wire. And no extra moving ones

Many people have outdated stereo systems in their closets and garages. They are not used because cassettes have long since become obsolete, and CDs are also almost dead. Well, such a center is not provided for a flash drive. Although the entire audio path is

For example, you need to lay a power cable underground from the house to the bathhouse or garage. It wouldn't be right to just bury it like that. To protect it, you need to use a special PVC pipe for such purposes. But how to get through it

Making a miniature hydroelectric power station for lighting, charging phones and other needs is quite simple.Such a power plant can be built in a country house, on a hike - when setting up a tent camp, and anywhere where there is no electricity, but there is a stream or

Due to loose twisting and poor tinning, the wires oxidize and the contact between them is disrupted. Over time, the twisted area begins to gradually heat up, which can lead to a fire in the electrical wiring. To ensure that the connection is durable, reliable and

Such Chinese devices are recommended for heating car interiors, bodies and engines to facilitate their starting and create comfortable conditions for drivers in winter. The power of our unit is 5 kW, supply voltage is 12 V. We will tell you how to use it

Your attention will be offered to two designs of the simplest homemade gasoline generator, made on the basis of an engine from a trimmer and a car generator. The power of such an installation can vary from 1 to 2 kW. It all depends on

The converter we are talking about does not contain a single radio element. Built entirely on two electric motors, one of which was taken from a microwave oven. The conversion principle is very simple: to a low-voltage motor

Supercapacitors have a colossal capacity compared to conventional capacitors.They also have a number of advantages over lithium-ion batteries, such as: they are not afraid of low temperatures and are not afraid of complete discharge. All this