DIY electronics. Page 9

SIM800L V2.0 GSM/GPRS is a quad-band GSM/GPRS module compatible with Arduino. The module is used to implement GSM (calls and SMS) and GPRS functions. The advantage of this module is the TTL interface, which has a voltage of 5V, which allows

This is an instruction (guide) on how to make a cheap, convenient and portable machine for spot welding metal from a damaged microwave oven. Please note that this is dangerous, as indicated by the sign on the

Each of us has long been accustomed to using all kinds of gadgets that make life easier: mobile phones, all kinds of smart phones and tablets, etc... In this article we will replace your usual watering can with a technological device for watering flowers, which will

I would like to share with you the performance of a clock using IV-9 lamps in a block from a TU-154 aircraft.On the body there is the inscription ITV-4, apparently this unit is called that! In its native place, this was a watch made using strict logic. The person who ordered from me

The 555 series microcircuit (NE555, SE555, NA555, SA555 and their analogues) is an affordable and cheap timer - a device for generating pulses with certain time characteristics. Based on these microcircuits, many

Digital multimeters are very popular among radio amateurs and professionals due to their versatility. To power them, as a rule, a nine-volt Krona battery is used, which has noticeable self-discharge, low capacity and

Hello friends. Today I want to tell you and show you my homemade product that uses voice control. It's actually a voice controlled on/off switch. The peculiarity of this homemade product is that this device may not

Many people have heard about the plasma ball, but not everyone wants to spend money on buying it. Radio amateurs know that you can make it yourself. Alas, for beginner radio amateurs, the diagrams on the Internet are quite complex and incomprehensible. This article will help

Hello dear visitors to the Do It Yourself site! Our editors are constantly looking for new crafts and new authors of articles.At the moment there is a large shortage in the category of electronics, exciting chemistry, computer homemade products and

Once in childhood, for my father, I assembled a primitive pulse charger with capacitor decoupling in the primary circuit of the transformer (4 µF x 400 V). It was called pulsed because the charge was carried out by a modified semi-sine wave,

Often, when walking through consumer electronics stores, I noticed such a device as a humidifier and never saw a dehumidifier. Someone will now say that almost any air conditioner has such a function as an air dehumidifier.

To control the operation of the engine and other powerful consumers, a starter is required. Why is it needed? Firstly, so that you can display the control buttons anywhere you want. The use of automatic machines limits this area, since

Since DRL 250 high-pressure lamps have a fairly long service life and high efficiency compared to incandescent lamps, they are successfully used to illuminate summer cottages, the courtyard of a private house, and sometimes even indoor garages. They

For decent quality soldering work, a home craftsman, and even more so a radio amateur, will need a simple and convenient soldering iron tip temperature regulator.For the first time I saw a diagram of the device in the magazine “Young Technician” of the early 80s, and having assembled

How to make an automatic hood? - It's not at all as difficult as it might seem. There are very different options, but I settled on something like a thermal relay. It will work like this: on a gas or electric stove code someone will do something

The simplest work related to electricity is difficult to perform without measuring tools. It is not at all necessary to measure the parameters of an electrical circuit with a tester; in many cases it is more convenient to use a universal probe that infects the presence

Many thanks to the manufacturers of modern energy-saving lamps. The quality of their products constantly makes us think and pushes us to new technical solutions. So this time we will consider the topic of remaking a failed

The topic of converting or upgrading failed fluorescent (energy-saving) lamps into LED lamps has been raised more than once. May the authors of these articles forgive me, but most of the proposed options are ineffective and certainly not aesthetically pleasing.

Deciding to keep up with the times and save my money in the future, I decided to make some useful innovation. Or rather, convert lamps with fluorescent lamps into lamps with LED lamps. Long service life, saving

Probably many people wanted to add something new to their car, today I will tell you how to do this without special costs and technical changes in the design of the car. The device that I want to present to you today is not a large adjustment circuit

Modern imported soldering irons often have an overheating problem. And domestic ones sometimes experience underheating, and it is also observed when the voltage drops. In this article I will tell you how to solve these problems and also make soldering more efficient.

The best gift, as you know, is the one you made yourself. What will be described in this article is distinguished by its originality and will delight the one you want to please for a long time. At the same time, such work requires

It just so happened in old village houses that even the most unnecessary and completely outdated thing could not be thrown away under any circumstances, but was carried away “out of sight”, in the hope that it would come in handy someday. And it was useful. From the old

Recently, radio amateurs are increasingly using this technology to create boards for amateur radio designs. This technology is distinguished by its simplicity and reliability.