DIY electronics. Page 5

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

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.

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

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

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 motors do not need a starting capacitor.

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

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

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

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

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