Electronics. Page 30

A posistor is an electronic component that has a positive resistance coefficient and performs dual functions: a heater and a temperature sensor. When high voltage or current is applied, the electronic component becomes hot. The higher it gets

Today no one will be surprised by an LED flashlight. You can buy them on almost every corner. There are countless varieties of all shapes and sizes on our market. But their characteristics are very different, and sometimes not

I propose for assembly another electronic device designed to automate human life. Its operation can be described as follows: at a given time it turns on the load, and at a specified time it turns off, and the next day the cycle repeats.

Hi all! Today I will tell and show you how to connect an electric motor from a modern washing machine to a 220 V AC network.I would like to say right away that such engines do not need a starting capacitor.

Good afternoon, dear readers! Today we will build a simple power supply for low-power loads. Let me make a reservation right away: the power of the circuit can be increased, but more on that later.

Nowadays, you can often find outdated CRT TVs in the trash; with the development of technology, they are no longer relevant, so now they are mostly getting rid of them. Perhaps everyone has seen on the back wall of such a TV an inscription in the spirit

Energy-saving fluorescent lamps are not as durable and gradually fail. Their time is slowly coming to an end and they are being replaced by LED lamps. LED lamps consume significantly less energy, are more durable and do not

In this article we will look at the process of creating a very necessary and interesting electronic device that will allow you to play wav files directly from an SD, microSD or mini SD memory card. You can record a music file on the memory card,

I'll show you how to make universal LED lighting for anything, be it lighting a work area or lighting a niche in a bed. The LED strip will light up automatically when an object approaches and will also automatically turn off after

Electric bicycles are in trend today. Even well-known car companies will present a model of a futuristic bicycle of the future, the operation of which is based on clean, cheap energy. Well, those who like to make things with their own hands also don’t bypass

You can often find devices on sale that are installed on a flower pot and monitor the level of soil moisture, turning on the pump if necessary and watering the plant. Thanks to this device, you can safely travel to

In our world, full of a variety of machines and automated mechanisms, bicycles stubbornly do not lose popularity. They are remade, modernized, and new models of incredible shapes and sizes are created. But they are based on the same two wheels. AND

Sometimes there is a desire to assemble some kind of electronic device, not very complicated, but at the same time very interesting. And if it also turns out to be useful, that’s absolutely beautiful. For those people who don't know what to do on the long weekend,

Perhaps even a person far from electronics has heard that there is such an element as a relay. The simplest electromagnetic relay contains an electromagnet, when voltage is applied to it, two other contacts are closed. With relay

External speakers, USB speakers and speakerphones and headsets are conquering the market of electronic devices today.It can be difficult for an inexperienced consumer to understand all these new products. Sometimes it turns out that most of them turn out to be

Good day, dear readers! Today we will talk about assembling a simple low-pass filter. But despite its simplicity, the quality of the filter is not inferior to store-bought analogues. So let's get started! Main characteristics: Cutoff frequency 300

As you know, no electronic device works without a suitable power source. In the simplest case, a conventional transformer and a diode bridge (rectifier) ​​with a smoothing capacitor can act as a power source.

In our world, quite a lot of people are engaged in homemade experiments in home laboratories and workshops. For some, it is a way to assert themselves, for others, it is a desire to develop their abilities. So what if it's an experiment from

Alternative energy sources are the most fashionable trend in science today. Advanced technologies are competing to obtain cheap electricity from the energy of air, sun, and water. And absolutely all of them are fighting for maximum efficiency. After all, if

Hello, today I will tell you how to make an adjustable power supply based on lm317 chips. The circuit will be able to produce up to 12 volts and 5 amperes.

Who would have thought that a simple inverter could be made without the use of transistors and complex circuits. Last time I showed how to make an inverter without transistors on a relay. As it turns out, this is not the only way to build an inverter. I'll show you how

Now a lot of digital equipment is breaking down, computers, printers, scanners. Time is like this - the old is replaced by the new. But equipment that has failed can still serve, although not all of it, but certain parts of it for sure. For example, in printers and

A useful homemade product that will definitely come in handy almost anywhere where there is a USB: At home for lighting: you can connect it to either a computer or a laptop. When hiking, fishing or hunting: you can connect to an external battery (power

Hello friends. Today I will tell you how to make a small power amplifier using the tda2822m chip. Here is the circuit that I found in the datasheet of the chip. We will make a stereo amplifier, that is, there will be two speakers - right and left channels.