Electronics. Page 15

The circuit of this audio frequency power amplifier is very attractive in that it does not contain any microcircuits, is entirely built on transistors, and yet is quite simple and has a minimum of parts. Thanks to several

This is a homemade product from the category: “what else can be made from the parts of a broken laptop?” The laptop actually has a lot of useful things for DIY. In this master class we will use his camera. Let's make it wireless so you can look into it

When repairing a faulty electronic device, you find a burnt resistor on the board, how can you determine its value? All the markings on it have faded and it is not possible to measure the resistance with a multimeter. If you're lucky, you can find it in

In a conventional electric soldering iron, the tip has a small contact surface with the spiral.As a result, a significant part of the heat is lost to heating the housing. We offer the design of a homemade soldering iron, in which heating is carried out in the very

If you look at complex electronic boards, such as the motherboard, you can see printed conductors running in pairs in parallel. In addition, some of them can be laid in a “snake” pattern, which looks unusual against the backdrop of straight paths. It's all done

The laser beam is very well modulated by sound vibrations. It is enough to connect the module from the laser pointer to the output of the low-frequency amplifier and you will have a ready-made audio signal transmitter in the light range. Accept and convert

This instruction will help you convert the power supply into an adjustable one. If you have a 19 V power supply from a laptop or a 12 V LED garland unit, then all such sources can be turned into adjustable ones and installed on

When studying the nature of various physical phenomena and processes, it is interesting to conduct visual experiments. One such experiment is a demonstration of the operation of a simple radio transmitter and receiver. You can make such equipment yourself.

This simple modification to the electric motor will increase its power, speed and lower the supply voltage.The efficiency will remain unchanged; the law of conservation of energy has not yet been canceled. Perhaps you have already had a similar need, reduce the supply voltage

Soldering iron tip cleaning paste acts in two directions at once. Firstly, it cleans the tip from oxides and carbon deposits. Secondly, he tins it and wets it with solder. Essentially a comprehensive tool to quickly prepare a soldering iron for work. Factory samples

Despite the fact that the neon lamp was invented quite a long time ago, it is still actively used to this day. Its most numerous application is in power indicators. Surely you also have an extension cord or surge protector with a glowing light at home.

If used incorrectly, the non-burnable tip still burns and becomes covered with a black, persistent coating. Naturally, it becomes impossible to continue using the soldering station, since the solder does not stick. To restore such stings they sell

If you often need to monitor the network voltage, then you will agree that doing this constantly with a multimeter is not very convenient. For these purposes, you can make a voltmeter, which, like a plug, will be inserted into a socket and visually displays the voltage

Soldering is a rather painstaking process, all the intricacies of which take months to learn.It's not just the complexity of stripping and tinning, but also a lot of different little things. Let's look at 11 tips that will improve your soldering technique.

Devices such as Bluetooth headsets, MP3 players, and similar miniature gadgets use very low-capacity batteries. Maximum 3-4 hours of listening to music, no more. How many times have I repaired and disassembled them, everywhere?

The LA4440 microcircuit is a very attractive element for electronics because it has a simple switching circuit, low supply voltage and low cost of purchase. It can be used in stereo mode or bridged both channels

A remote control system for water supply can be useful in many areas of everyday life. A classic example: watering a garden or filling a container. To show how easy it is to do this, let's assemble this setup and control the water supply

It’s quite possible to make a powerful amplifier on a single LM3886 chip, mounted mounted, in 15-30 minutes. When using a good power supply, such an amplifier will easily produce up to 100 W of power per channel of clear and high-quality sound.

The 12V battery voltage is enough to melt thin metal parts when the contacts close, causing them to weld together.Using a battery, you can assemble a mini welding machine. They can cook various thin-walled

You can assemble a very simple night vision device yourself without even knowing the basics of electronics. All modules are purchased, they can be purchased on AliExpress (links in the article) or another site. All that remains is to solder them together according to a simple block diagram and

Residents of cities and towns located near television transmitting stations do not need to install antennas with signal amplifiers. For them, purchasing such equipment is not practical. It is enough to assemble a simple antenna from aluminum

9V batteries are not often used, but are still used in various toys, radios, and measuring instruments. Their resource is not very durable. In order not to constantly buy these batteries, you can make such a battery yourself with charging

To equip various homemade products, a small DC electric motor may be required. It can be purchased or dismantled from broken equipment, but it is also possible to make it yourself. It's not as difficult as it might seem

You can make a very simple LED police flasher yourself in about 15 minutes. There are no microcircuits or transistors in it. Even someone who is very vaguely familiar with electronics can assemble this circuit. The role of the master oscillator will be