Electronics. Page 11

This is one of the simplest and most accessible instructions for quickly reviving your screwdriver with barely alive or completely dead batteries. After all, finding an old computer power supply is quite easy. It does not need to be remade, even if your

For any conditions and needs, be it auto repair or shooting high-quality photos and videos, good light is important. To do this, you can assemble a lamp with very bright homemade lamps. They are made from ordinary LED daylight strip.

For accurate and quick cutting of circuit boards, as well as sheet plastic and other thin materials, you can make a miniature desktop machine. It is accurate and very quiet, so it is even suitable for use in an apartment. This is the ideal equipment for

It is most convenient to perform soldering with flux in the form of a gel. But not all such purchased compositions can prevent oxidation of contacts, like rosin.If you want to combine the convenience of flux and the reliability of rosin, then prepare it using your own

Surely you have a Chinese radio bell lying around in your bins. At one time they were very popular, but as it turned out, they were not entirely practical due to the high cost of batteries. Although some still use them today. So, from this

Not everyone knows that any semiconductor diode is capable of converting solar energy into electrical energy. The main thing is that sunlight falls on the crystal of the device. A simple example of how you can build a simple solar battery using diodes in a transparent,

If the fluorescent lamp in the lamp fails, an LED strip can be installed in its body. Externally, such a modification will not be noticeable, but the modified device will become more economical and reliable. The resource of LED strips is almost 5 times

If an LED light bulb stops working or starts flickering, the problem usually lies in one of the LEDs. It is enough to replace it so that it shines like new again. Let's look at how to do this.

Lithium-ion batteries are extremely sensitive to overcharging. And as soon as you recharge the battery a little, it immediately breaks down. To ensure that batteries are charged evenly in a series circuit, balance protection circuits are used,

Whatever the paradox, it is difficult to imagine a simpler amplifier that you can make with your own hands. Just one chip, without any filtering or correction circuits, can turn into an audio frequency power amplifier in a couple of minutes.

If you weld two rods of different metals together and start heating the joint, a slight voltage will appear at their ends. At the beginning of the last century, thermal generators were made using this principle to power walkie-talkies, which removed energy from

Solenoid valves are used to remotely open the water flow in the pipeline. They allow you to set up an automatic system for irrigation of plants or watering of animals. You can make a solenoid valve for water based on a valve

Aliexpress sells the already well-known ESP8266 microcontroller, which is used in the manufacture of smart home systems. Based on it, you can assemble a very cool night light from CDs, controlled through a mobile application. This

To diagnose malfunctions of digital TVs, set-top boxes and similar equipment, you usually do not need high-precision diagnostic instruments. In most cases, a logic tester is sufficient to determine the level state of the circuit being called.

For soldering small SMD components, it is best to use a soldering gun. It heats all chip legs evenly, allowing them to be attached to boards 10 times faster than with a regular soldering iron. You can make a soldering hair dryer from a regular glow plug from

Good acoustic speakers are expensive. It is not profitable to order them from China due to expensive delivery, since they are quite large. To save money, you can buy components for them on Aliexpress and make the case yourself.

This lamp will make your life very easy both in the workshop and in other dark rooms such as a closet. Turns on and off with one touch, has bright light and long run time. Powered by a common battery

Typically, when converting a bicycle into an electric bike, the motor is installed on the rear wheel. As a result, difficulties are created with the implementation of the braking system. The easiest way to convert is to make a front-wheel drive bike. Let's see how it's

When repairing boards, it becomes necessary to desolder components. This requires removing melted solder on each individual leg. The fastest and most convenient way to do this is with a tin pump. Such a device can be assembled on the basis of a compressor from

The simplest dimmer consists of only 5 parts and is capable of adjusting load power up to 2 kW at an AC voltage of 220 V. Even a novice radio amateur can cope with its repetition, the main thing is not to forget about safety precautions when

To solder various small items, you need a soldering iron of the appropriate tip size, which will also not overheat circuits and miniature electronic components. You can make it yourself from a 10 Ohm resistor. The special feature of this soldering iron is that

After the screwdriver battery fails, it can be switched to a 220V network. This requires only an adapter and a power supply. This is a very simple modification that does not require much time or large expenses.

It is convenient to use a miniature drill for drilling circuit boards or making parts for modeling. It is light, quiet, and does not take up much space. Sometimes even the smallest drill on sale is too big for delicate work. If you haven't found

For many jobs, a full-size heat gun is too big. For delicate tasks, you can use a homemade hair dryer with a thin nozzle. They are convenient for setting heat-shrinkable tubing, spot heating plastic, drying two-component glue, etc. This is done