Electronics. Page 29

The basis was an industrial asynchronous AC motor with a power of 1.5 kW and a shaft speed of 960 rpm. By itself, such a motor cannot initially work as a generator. It needs improvement, namely replacement or

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

Many electric tools, especially from previous years, are not equipped with a soft start device. Such tools are launched with a powerful jerk, which results in increased wear of bearings, gears and everything else.

Surely, most people have old hard drives lying idle in their bins.From it you can make a necessary and useful thing for sharpening knives, scalpels and other objects - a miniature grinding machine with a wheel rotation speed controller.

A simple design for determining the amount of liquid in any container. Its huge advantage is that it can be scaled to fit absolutely any size and vessel without any problems. For example, you have a rainwater tank and you want

Modern man is accustomed to using electrical energy everywhere. It's hard for us to imagine the absence of electricity, on which most of our meaningful lives are based. But have you ever wondered where it comes from? What

Sometimes situations arise when you need to turn on the lights in the room every day at dawn and turn them off at sunset, i.e. simulate daylight inside any enclosed space. This may be required, for example, when growing plants

Now there is a huge variety of audio amplifier circuits on microcircuits, for any needs, for any supply voltage, with different output powers. Microcircuit amplifiers are easy to create and do not require special configuration, unlike

As you know, laziness is the engine of progress. It’s impossible to count how many different electronic devices people have developed in order to automate their lives.Automation has penetrated into all spheres of human life and now sometimes we even feel

Many household electrical appliances, be it stereo systems, televisions, various lamps, are turned 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 come across power supplies that reduce the high voltage in the network to a few volts, which are necessary to connect various devices. However, the reverse transformation can also be done. Moreover, the scheme is completely simple.

SMD parts are increasingly used in production, as well as among radio amateurs. It is more convenient to work with them, since there is no need to drill holes for leads, and the devices turn out to be very miniature. SMD components can also be used

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

Recently, an activity such as searching for various ancient coins, household items, and just metal trinkets in the ground using a metal detector has become very popular.In fact, what could be better than taking a walk in the morning?

Hello friends, today we’ll talk about a homemade metal detector. First, I found a circuit on the Internet based on the NE555P timer chip, but it seemed too complicated to me for those who do not understand the symbols on radio circuits, and even display it on

When creating various electronic devices, sooner or later the question arises of what to use as a power source for homemade electronics. Let's say you've assembled some kind of LED flasher, now you need it for something

Circuits using microcontrollers are gaining quite a lot of popularity on the Internet. A microcontroller is a special chip that, in essence, is a small computer with its own input/output ports and memory.

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

Now on the Internet you can find a huge number of circuits of various amplifiers on microcircuits, mainly the TDA series. They have quite good characteristics, good efficiency and are not that expensive, which is why they use such

I have a lot of different office equipment that is out of order. I don’t dare throw it away, but maybe it will come in handy. It is possible to make something useful out of its parts. For example: a stepper motor, which is so common, is usually used

When you want to enhance the sound of your device, be it a phone or tablet. Turn the volume all the way up and the app drains the battery. But sometimes the volume is not enough. At home, if there is an outlet, speakers are used. Helps with food problems outside the home

Television today is in every home. With the development of technology, the quality of television signals and methods of their transmission change. And if just yesterday antediluvian analogue broadcasting was used, today exclusively digital broadcasting is persistently discussed. On

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

A thermocouple is a sensor consisting of two conductive conductors with different properties, soldered together. The measurement occurs due to the formation of a thermal electromotive force (voltage) generated between the conductors. Depending