Electronics

Hello friends. Today I want to tell and show you my homemade product that uses voice control. In fact, it is a on / off switch with voice control. A feature of this homemade product is that this device can not only control the load by a voice command, but can also respond with voice commands recorded previously on a flash card.

Good day to all, dear friends! In this video we will consider a radio-controlled outlet or a socket with a remote control. This device is designed for remote switching power of almost any household appliance. The remote control socket can control the light, fan, heater, light garland, etc.

Hello! Today we will get acquainted with such a tricky device called a wattmeter. The device has a built-in design and can be integrated into the device or operated directly without installation. The wattmeter is designed to measure active power by a consumed device connected to it.

A stepper motor is not only a motor that drives all kinds of devices (printer, scanner, etc.), but also a good generator! The main advantage of such a generator is that it does not need high revs. In other words, even at low speeds, the stepper motor generates a lot of energy.

Hello dear friends. Today, these not expensive and high-quality headphones will be the subject of my review. To begin with, I needed high-quality headphones for the computer. By the quality of the headphones, I mean first of all high-quality sound and secondly - the reliability and durability of the design.

I welcome you dear friends! Today I will tell you about my next homemade product. This is a hood with automatic control. No, of course I didn’t do the hood itself - I bought a ready-made one, but I organized the automatic switching on the basis of ready-made electronic modules. The hood itself turns on and off when there is fire on the stove.

Greetings, dear friends. Finally, I got to recording a lesson on working with the voice module. I see you liked my home-made voice-activated device and many have already begun to wonder when the practical lesson on working with the voice control module will be released. On the advantages of this recognition module: - The module is autonomous and can work without an external control controller, which is very important for radio amateurs who are not familiar with programming.

Among hams and professionals, digital multimeters are very popular due to their multifunctionality. For their power, as a rule, a nine-volt Krona battery is used, which has a noticeable self-discharge, a small capacity and a higher price in comparison with other elements. The proposed device for supplying a digital multimeter from one AA element with a voltage of 1.5 volts will allow to avoid the indicated drawbacks in operation and simplify the operation of the device.

These are instructions on how I built the Van de Graf Generator with my own hands from someone else's unnecessary garbage. Here it is in the figure: So, the first thing to do is assemble all the necessary components. They include: 1 pencil, two old dried pastes, a piece of PVC pipe, one dead light bulb, a long piece of gum, a paper clip, aluminum foil, scotch tape, one small motor from the toy, a nine-volt battery, and some wire, well, the base is wooden plank.

The role of our plasma ball will be an ordinary incandescent lamp, but the high-voltage source of high frequency is quite simple. In addition, from our source you can build not only a plasma ball, but also demonstrate beautiful experiments with high voltage: arc and corona discharges, Jacob's staircase, a fluorescent lamp that lights up in your hand, etc.

A clock - a night lamp - is a great thing for those who like to wake up at night. Usually people wake up in the middle of the night and frantically search for their mobile phone to see the time. Our craft kills two birds with one stone: this is the backlight and a nightlight. There is enough light to see confidently in the room. The brightness and color of the glow can be easily adjusted as you like.

On the Internet, you can find a huge number of schemes radio bugs. Some circuits are too complex and require tuning, others include scarce radio components, and others do not work at all! I bring to your attention a bug scheme that can be assembled by both an experienced radio amateur and a beginner in this matter.

The 555 series chip (NE555, SE555, NA555, SA555 and their analogs) is an affordable and cheap timer - a device for generating pulses with certain time characteristics. On the basis of these microcircuits, many simple devices can be built - from the speed controller of an electric motor to a time relay and a voltage regulator.

An electroscope is a simple indicator device for determining the electric charge. It is very simple to do at home with your own hands. To do this, we need a piece of foil and a jar with a plastic lid. For better stability, a cocktail straw and a plastic ball are wrapped inside the foil.

I want to share with you the performance of watches on the IV-9 lamps in the unit from the TU-154 aircraft. On the case there is an inscription ITV-4, apparently this unit is called that! In their native place, this was a watch made on rigid logic. The person who ordered the alteration from me wanted to use them as a desktop accessory that would show the time and temperature, depending on the mode.

There are times when you need a small-sized light source or light source will not be at hand. This mini flashlight can come to your aid. It can be made in a short period of time from available parts. Here it is in the picture. To build it, we need: a 3-volt tablet battery, an ultra bright LED, a battery cassette and a button.

This article is not a guide on how to install the sensor, but rather how to upgrade it yourself for home use. Now motion sensors are sold absolutely ready for installation. In addition to the motion sensor itself, it has a built-in light sensor and a timer. "So what to upgrade in it if everything is already in it?

Alkaline batteries last quite a long time, but when their charge drops below one volt in most devices, they become useless. Usually such batteries are thrown away. I suggest a more rational use of battery energy and make a simple flashlight, which will work within 1-0.5 volts.

Guitar pickups from tone-2a speakers There are many ways to make guitar pickups. I will tell you about the simplest one that requires minimal knowledge in radio engineering. First we need to find the things necessary for this: 1) 3 tone-2 dynamics (there may be a different letter index) with a resistance of at least 1000-1500 ohms.

Almost every radio amateur faces the problem of an overheated soldering iron when the tip is heated more than necessary. Soldering with such a soldering iron is not very convenient: the solder begins to change color, covered with an oxide film, the flux instantly evaporates or generally begins to shoot, etc. The way out can be very simple.