How to make an electrical appliance with your own hands. Schemes auto collection. DIY radio circuits for home: making an electronic lock

Many electrical appliances can be repaired or new made by hand. For this house, there is always something that can be remade to perform new functions: an old electronic clock, a children's car, a disused computer, and much more. Useful crafts can always be repaired or redone. For work, it is better to have a workshop with tools.

Equipped Master's Home Workshop

Power Supply

Self-made electronic devices need power supply of different voltages. In particular, soldering requires a regulated power supply. Such an opportunity can be provided by the LM-317 microcircuit, which is a voltage stabilizer.

Regulated power supply circuit

Devices based on this circuit allow you to change the output voltage within 1.2-30 V, using a variable resistor P1. The permissible current is 1.5 A, the power of the device depends on the choice of the transformer.

Adjustment of the voltmeter is carried out with a trimmer resistor P2. To do this, set the current to 1 mA at the output voltage of the circuit 30 V.

The more power is released on the microcircuit, the greater the difference between the input and output signals. To reduce heating, it requires a radiator with a cooler.

A homemade board with an LM-317 microcircuit fits into a case - a computer power supply. A voltmeter and clamps to the output wires are installed on the front panel made of PCB.

Simple auto test

A probe for cars and other purposes should always be at hand at home, in the garage or on the road. The figure below shows a homemade scheme that allows you to check electrical circuits with a resistance of up to 10 kΩ and the presence of a voltage of 6-15 V.

The two indication circuits are connected in series with the battery and in parallel with each other. The first consists of a resistor R1 and an LED HL1, which glows when checking the voltage. The battery is being recharged at the same time.

Scheme and design: a) homemade circuit, which allows you to check electrical circuits with a resistance of up to 10 kOhm and the presence of a voltage of 6-15 V; b) self-made design of the auto-sampler

When the circuit is tested, current flows from the battery through the HL2, R2 circuit. The HL2 LED is on. Its brightness will be the greater, the lower the resistance of the circuit.

Like all homemade products, the probe can be constructively made in different ways, for example, by placing it in a transparent plastic case, which is easy to glue with your own hands.

Such devices are indispensable when repairing an electrical network or household appliance at home. Crafts can be more complex and have additional functions.

Electric appliances for heat-treating meat products without the use of fuel are made in small quantities and can be used at home or in the country. To prepare a barbecue, using an electric barbecue grill, there is no need to spend expensive hours of rest, standing on the street by the barbecue.

In specialized stores, you can choose any device, but a lot is decided by the price. If you have the skills to handle electricity, it will be much cheaper to make an electric BBQ grill with your own hands.

Structures are made in horizontal or vertical design. The power of the device usually does not exceed 1.5 kW. The meat is heated using a spiral with a tungsten or nichrome filament. All metal parts are made of stainless steel.

Typical devices are vertical heaters in the center and skewers with food around. They are attached from above. It is advisable to make the skewers in the form of spirals, from which the meat does not slide down during the cooking process.

Type of vertical BBQ grill

For high-quality cooking of a kebab maker with your own hands, the skewer should be placed as close to the heater as possible, but so that the product does not touch the spiral. When placed at a distance, the meat will not fry but dry.

Pieces of the product, no more than 40 mm in size, are placed on a skewer, which is placed vertically around the heater. Then the electricity is turned on and the spiral is heated.

The heater is based on a heat-resistant ceramic tube with a coil wound around it. Fastening at the bottom is done with a special chuck.

In the round base there are special cups for collecting fat and a frame that serves to hold the skewers upright.

Cups are made of stainless steel. From below, they have cruciform projections, which are inserted into the slots of the base. Inside they are equipped with devices for attaching skewers. Fixing the cup on both sides allows them to hold the skewers upright.

The connection must be strong and at the same time easy to disassemble for cleaning. A common removable tray can be made for all skewers.

The cross-sectional lead wire is selected for the power of the heater (2.5 or 4 mm 2). At home or in the country, there must be a 16 A socket for him.

Timer for watering plants

Devices with timers are used for drip irrigation of a site from a container at a certain time. They can be connected to valves of any capacity.

Often branded devices do not provide the required reliability. Then an old wall clock comes to the rescue, which is serviceable, but is no longer used at home. Small magnets are attached to the ends of the minute and hour hands, and 3 reed switches are attached to the dial.

Scheme of a timer for watering plants in which a wall clock is applied

As soon as the hour hand reaches the number 7, and the minute hand reaches 12, which corresponds to the time of 7 o'clock, the reed switches SA1 and SA3 are triggered and the signal opens the solenoid valve. After 2 hours, the arrows will move to 9 and 12, and the current through the contacts of the reed switches SA1 and SA2 will be supplied to close the valve.

The diagram shows a "rain sensor", which in wet weather closes the transistor VT1 and the valve remains constantly closed. There is also a manual control of the solenoid valve via buttons S1 and S2.

You can set the clock for any time the valve is turned on.

Car with remote control

Homemade radio-controlled models capture not only children, but also adults. They can be used to play at home or arrange real competitions in the yard. To assemble with your own hands, you will need a chassis with wheels, an electric motor and a body.

There is a large assortment on sale, but first of all, you need to decide which machine is best to make. The control panel can be wired or radio-controlled.

When choosing parts, you should pay attention to their quality. There should be no chipping, inclusions or other mechanical defects on the plastic. Wheels are sold with a chassis and should turn easily. Grip is better provided by rubber. Plastic wheels are much worse in this regard.

It is better for a beginner to take an electric motor, which is cheaper and easier to maintain than an internal combustion engine. You can choose any body or make according to your own sketch.

The motor, battery and radio unit with antenna are installed on the mini-car chassis. If a kit with accessories is purchased, assembly instructions are attached to it.

After installing the parts, the operation of the motor is regulated. The case is installed on the chassis after everything is working.

Assembling mini-copies can be done at home as follows:

the car is assembled carefully and with common efforts;
the materials of the model parts may differ from the original;
small and insignificant details can be omitted.

The model can be made without looping on a certain car brand. Much depends on finances and free time. Assembling a mini-car at home with your child is of great educational value.

The work on assembling the car model is carried out according to the plan. Some parts need to be purchased, but old toys can be used.

The motor must match the weight of the device in terms of power. Fresh batteries or accumulator are used for power supply.

If you use a special auto-constructor, crafts can be very diverse. Assembly sequence:

the frame is assembled first;
the motor is attached and regulated;
a power source is installed;
an antenna with a radio unit is fixed;
wheels are installed and adjusted.

Types of radio-controlled car models

Many homemade tricks are revealed in this video.

Electronic homemade products can make life more comfortable and save a lot of money. In addition, you can find use for old electrical appliances so that they do not gather dust in the pantry for no purpose. Useful DIY crafts are often better than factory-made products.

One of the common hobbies of hobbyists and electronics professionals is the design and manufacture of various homemade products for the home. Electronic homemade products do not require large material and financial costs and can be performed at home, since work with electronics is, for the most part, "clean". The only exception is the manufacture of various body parts and other mechanical assemblies.

Useful electronic homemade products can be used in all areas of everyday life, from the kitchen to the garage, where many are engaged in the improvement and repair of electronic devices in a car.

Homemade products in the kitchen

Electronic homemade kitchens can be added to existing accessories and supplies. Industrial and home-made electric BBQ grills are very popular among apartment residents.

Another common example of homemade kitchens made by a home electrician is timers and automatic lighting over work surfaces, electric ignition of gas burners.

Important! Changes in the design of some household appliances, especially gas appliances, may cause "misunderstanding and rejection" by regulatory organizations. In addition, it requires great care and attention.

Electronics in the car

Homemade devices for a car are most widespread among the owners of domestic brands of transport, which differ in the minimum number of additional functions. Such schemes are in wide demand:

Sound indicators of turns and hand brake;
Indicator of operating modes of the storage battery and generator.

More experienced radio amateurs are engaged in equipping their car with parking sensors, electronic window drives, automatic light sensors to control low beam headlights.

Homemade products for beginners

Most novice radio amateurs are engaged in the manufacture of structures that do not require high qualifications. Simple proven designs can serve for a long time and not only for the sake of benefit, but also as a reminder of the technical "maturation" from a novice radio amateur to a professional.

For inexperienced hobbyists, many manufacturers produce ready-made design kits that contain a printed circuit board and a set of elements. Such kits allow you to practice the following skills:

Reading circuit and wiring diagrams;
Correct soldering;
Adjustment and adjustment according to the ready-made method.

Among the sets, electronic clocks of various designs and degrees of complexity are very common.

As an area of application of knowledge and experience, radio amateurs can design electronic toys using simpler circuits or reworking industrial structures to their wishes and capabilities.

Interesting ideas for crafts can be seen in the examples of making radio electronic crafts from worn-out parts of computer technology.

Home workshop

For the independent design of radio electronic devices, a certain minimum of tools, fixtures and measuring devices are required:

Soldering iron;
Side cutters;
Tweezers;
Screwdriwer set;
Pliers;
Multifunctional tester (avometer).

On a note. When planning to do electronics with your own hands, you should not tackle complex structures right away and purchase an expensive tool.

Most radio amateurs began their journey with the use of the simplest soldering iron 220V 25-40W, and the most popular Soviet tester Ts-20 was used from the measuring instruments in the home laboratory. All this is enough for practicing with electricity, acquiring the necessary skills and experience.

It makes no sense for a novice radio amateur to buy an expensive soldering station if there is no necessary experience with a conventional soldering iron. Moreover, the possibility of using the station will not appear soon, but only after sometimes quite a long time.

Also, there is no need for professional measuring equipment. The only serious instrument that even a novice hobbyist may need is an oscilloscope. For those already versed in electronics, the oscilloscope is one of the most sought after measurement tools.

Inexpensive Chinese-made digital devices can be successfully used as an avometer. Having rich functionality, they have high measurement accuracy, ease of use and, what is important, have a built-in module for measuring transistor parameters.

Speaking of a homemade workshop at a homemade product, one cannot fail to mention the materials used for soldering. This is solder and flux. The most common solder is POS-60 alloy, which has a low melting point and ensures high soldering reliability. Most of the solders used for soldering all kinds of devices are analogs of the mentioned alloy and can be successfully replaced by it.

As a flux for soldering, ordinary rosin is used, but for ease of use it is better to use its solution in ethyl alcohol. Rosin-based fluxes do not need to be removed from the installation after work, since they are chemically neutral under most operating conditions, and a thin rosin film formed after the evaporation of the solvent (alcohol) exhibits good protective properties.

Important! When soldering electronic components, under no circumstances should active fluxes be used. This is especially true of soldering acid (zinc chloride solution), since even under normal conditions such a flux has a destructive effect on thin copper printed conductors.

For maintenance of highly oxidized leads, it is better to use active acid-free flux LTI-120, which does not require rinsing.

It is very convenient to work using solder, which includes a flux. The solder is made in the form of a thin tube with rosin inside.

Breadboards made of double-sided foil-clad fiberglass, which are produced in a wide range, are well suited for the installation of elements.

Security measures

Electricity is associated with a risk to health and even life, especially if do-it-yourself electronics are designed with a mains supply. Homemade electrical devices should not use transformerless AC mains power. In an extreme case, the adjustment of such devices should be done by connecting them to the network through an isolation transformer with a transformation ratio equal to one. The voltage at its output will correspond to the mains, but at the same time, reliable galvanic isolation will be provided.

Those who are engaged in radio electronics at home are usually very curious. Amateur radio schemes and homemade products will help you find a new direction in creativity. Perhaps someone will find an original solution to this or that problem. Some homemade products use ready-made devices, connecting them in various ways. For others, you need to completely create the circuit yourself and make the necessary adjustments.

One of the simplest homemade products. More suitable for those who are just starting to tinker. If you have an old but working cellular push-button telephone with a button to turn on the player, you can make, for example, a doorbell to your room from it. The advantages of such a call:

First, you need to make sure that the selected phone is capable of producing a sufficiently loud melody, after which it must be completely disassembled. Basically, the parts are fastened with screws or brackets, which are carefully folded back. When disassembling, you will need to remember what goes for what, so that later you can collect everything.

The player's power button is soldered on the board, and instead of it two short wires are soldered. Then these wires are glued to the board so as not to rip off the solder. The phone is going. It remains to connect the phone to the call button through a two-wire wire.

Homemade products for cars

Modern cars are equipped with everything you need. However, there are times when homemade devices are simply needed. For example, something broke, given to a friend and the like. Then the ability to create electronics with your own hands at home will be very useful.

The first thing you can interfere with without fear of damaging your car is the battery. If at the right time the charging for the battery was not at hand, you can quickly assemble it yourself. This will require:

A transformer from a tube TV is ideal. Therefore, those who are addicted to homemade electronics never throw away electrical appliances, hoping that they will be needed someday. Unfortunately, there are two types of transformers used: with one and with two coils. Anyone will go to charge a 6 volt battery, and only two for 12 volts.

The wrapping paper of such a transformer shows the winding leads, the voltage for each winding, and the operating current. To power the filaments of electronic lamps, a voltage of 6.3 V with a high current is used. The transformer can be altered by removing unnecessary secondary windings, or left as it is. In this case, the primary and secondary windings are connected in series. Each primary is designed for a voltage of 127 V, therefore, combining them, they get 220 V. The secondary ones are connected in series to get 12.6 V at the output.

The diodes must withstand a current of at least 10 A. Each diode requires a radiator with an area of at least 25 square centimeters. They are connected to a diode bridge. Any electrical insulating plate is suitable for fastening. A 0.5 A fuse is included in the primary circuit, and a 10 A fuse in the secondary circuit. The device does not tolerate a short circuit, therefore, when connecting the battery, the polarity should not be confused.

Simple heaters

In the cold season, it may be necessary to warm up the engine. If the car is parked where there is an electric current, this problem can be solved by using a heat gun. To make it you will need:

asbestos pipe;
nichrome wire;
fan;
switch.

The diameter of the asbestos pipe is chosen according to the size of the fan to be used. The performance of the heater will depend on its power. The length of the pipe is everyone's preference. You can assemble a heating element and a fan in it, you can only a heater. When choosing the last option, you will have to think about how to start up the air flow to the heating element. This can be done, for example, by placing all the components in a sealed enclosure.

Nichrome wire is also picked up by the fan. The more powerful the latter, the larger diameter nichrome can be used. The wire is twisted into a spiral and placed inside the pipe. For fastening, bolts are used that are inserted into pre-drilled holes in the pipe. The length of the spiral and their number are chosen empirically. It is advisable that the spiral does not get red-hot when the fan is running.

The choice of fan will determine what voltage needs to be applied to the heater. When using a 220 V electric fan, you will not need to use an additional power source.

The entire heater is connected to the network via a cord with a plug, but it itself must have its own switch. It can be either just a toggle switch or an automatic machine. The second option is more preferable, it allows you to protect the general network. For this, the tripping current of the machine must be less than the operating current of the room machine. The switch is also needed to quickly turn off the heater in case of malfunctions, for example, if the fan does not work. This heater has its drawbacks:

harm to the body from asbestos pipes;
fan noise;
smell from dust falling on a heated coil;
fire hazard.

Some problems can be solved by using another homemade product. Instead of an asbestos pipe, you can use a coffee can. To prevent the spiral from closing on the jar, it is attached to a textolite frame, which is fixed with glue. A cooler is used as a fan. To power it, you will need to assemble another electronic device - a small rectifier.

Homemade products bring not only satisfaction, but also benefit to those who are engaged in them. With their help, you can save energy, for example, by turning off electrical appliances that you forgot to turn off. A time relay can be used for this purpose.

The easiest way to create a timing element is to use the time to charge or discharge the capacitor through the resistor. Such a chain is included in the base of the transistor. The following details are required for the diagram:

high capacity electrolytic capacitor;
pnp type transistor;
electromagnetic relay;
diode;
variable resistor;
fixed resistors;
constant current source.

First, you need to determine what current will be switched through the relay. If the load is very powerful, you will need a magnetic starter to connect it. The starter coil can be connected via a relay. It is important that the relay contacts can work freely without sticking. A transistor is selected according to the selected relay, it is determined with what current and voltage it can work. You can focus on KT973A.

The base of the transistor is connected through a limiting resistor to a capacitor, which in turn is connected through a bipolar switch. The free contact of the switch is connected through a resistor with a minus supply. This is necessary to discharge the capacitor. The resistor acts as a current limiter.

The capacitor itself is connected to the positive rail of the power supply through a variable resistor with high resistance. By selecting the capacitance of the capacitor and the resistance of the resistor, you can change the delay time interval. The relay coil is shunted by a diode, which turns on in the opposite direction. This circuit uses KD 105 B. It closes the circuit when the relay is de-energized, protecting the transistor from breakdown.

The scheme works as follows. In the initial state, the base of the transistor is disconnected from the capacitor and the transistor is closed. When the switch is turned on, the base is connected to the discharged capacitor, the transistor opens and supplies voltage to the relay. The relay operates, closes its contacts and supplies voltage to the load.

The capacitor begins to charge through a resistor connected to the positive terminal of the power supply. As the capacitor charges, the base voltage begins to rise. At a certain voltage value, the transistor closes, de-energizing the relay. The relay disconnects the load. To make the circuit work again, you need to discharge the capacitor, for this switch the switch.

Electronic homemade products, today, are an affordable way of making useful mechanisms that can make life easier and diversify leisure. Modern craftsmen are able to assemble both simple toys and complex, multitasking mechanisms with their own hands. How to easily and quickly make electronic toys, interesting and useful electronic homemade products for your home and car with your own hands - read below!

Simple DIY electronics: making a spinner

Electrical engineering is widely used today for both practical and recreational purposes. Some inventions (such as, for example, a “smart home” system) will be quite difficult for a beginner to make. They require experience and in-depth knowledge of physics. Other designs are simple and affordable for novice radio amateurs. So, for example, you can make interesting toys with your own hands - spinners, the sales of which have increased incredibly this year.

To assemble a toy, you will need to stock up on:

Wooden blank 9x4x1.2 cm;
Bearing 2.2x0.8x0.7 cm (with rubber seal);
Two RGB LEDs;
Two batteries and CR2032 holders;
Stainless steel bolt 0.8x2 cm;
Cap nuts M8.

After that, you can get to work. First of all, it will be necessary to find a design diagram on the Internet, and transfer it to an untreated bar - a blank. To correctly mark the technological holes (there will be three of them), you will need a ruler.

Then follows:

Drill a 2.2 cm through hole in the middle of the workpiece for the bearing;
Drill two holes with a diameter of 2.5 cm and a depth of 7.5 mm on the sides of the workpiece;
Using a drill, make two blind holes in the middle of two blind holes with a diameter of 6 mm for LEDs;
Process the holes with a countersink;
Give the toy a rounded shape using a jigsaw, band saw or jigsaw;
Sand the workpiece with sandpaper and varnish it;
Solder the LEDs to the battery holders;
Check the LEDs, and install them in the mounting holes, fixing them with super glue;
Clean the bearing, and treat its insides with WD 40;
Cut off the head of the bolt, and fix the axle in the bearing on both sides with nuts;
Install the bearing into the bore.

The spinner is ready! The toy will be interesting not only for children. Adults can also use such an electronic device: the device, while rotating, will help to relax or be distracted.

Simple schemes of electronic homemade products: making an electric call

You can make an electric call quite simply and quickly with your own hands.

Such a call will last a long time and will delight the ear. Indeed, when pressed, it will be able to create signals of different frequencies and tones.

So, an electric call can be single-tone and multi-tone.

The ability of a call to reproduce sound in one or several tones will be affected by the presence in the radio design of a multivibrator with two bipolar transistors. Let us consider in detail the scheme of an electronic call with a complex sound signal.

So, an electronic homemade circuit will consist of the following radio components:

Step-down transformer of the TA series;
Bell button;
Five fused silicon diodes;
1000 microfarad electrolytic capacitor
Two electrolytic capacitors with a capacity of 10 microfarads;
Two trimming resistors with a resistance of 470 kilo-ohms;
Two MLT resistors with a resistance of 10 kilo-ohms;
Two MLT resistors with a resistance of 33 kilo-ohms;
1 kilo-ohm MLT resistor;
Resistor MLT for 470 kilo-ohms;
Three silicon-plenary transistors of type 630D
Silicon planar transistor type 630G.

The principle of operation of the device is simple. Pressing the button will open the third 630D transistor, allowing current to flow to the fourth 630G transistor. This will create the primary signal. When the second transistor of the 630D type is opened, the third and fourth transistors will be locked, creating a signal of a different tonality.

DIY homemade products for a car

Car electronics, today, is in great demand. At the same time, home-made automation often has simple circuits, easy execution and installation. What kind of electric self-made products can you make yourself for your car?

So, you can do it yourself for a car:

Dynamic turn signals using the KIT DIY constructor;
Universal charger from old electronics;
Air conditioner based on a water pump;
Heated wipers and more.

The easiest way would be to design the lights for the seat belt buckles. To do this, it will be necessary to dismantle and disassemble the locks using a flat screwdriver. After that, with the help of hot glue in the locks, it is necessary to fix the LEDs.

Each LED can be switched on through its own current limiting resistor: this will extend the life of the semiconductor light emitting device.

After that, the locks should be assembled, and the wires supplying the LEDs should be pulled under the seats to the ignition or the size button through the cigarette lighter. At the request of the owner, the car interior lighting can be supplemented with lamps that signal that the seat belt is not fastened.

Unusual electronic homemade products: do-it-yourself binary clock

You can make a cool binary clock for your home with your own hands. This requires the Arduino platform. Wiring diagrams on this platform are simple and convenient, they are used for the manufacture of most electronic homemade products.

In addition, to make a binary clock, you will need:

Real time clock module on the DS1302 microcircuit;
Diffuse LEDs with a diameter of 1 cm (20 pieces);
Resistors with a resistance of 10 ohms (20 pieces);
Resistors with a resistance of 10 kilo-ohms (2 pieces);
Two tact buttons;
Frame.

The watch case should consist of two halves, which can be made of wood, plastic, metal. It depends on what style your watch is going to be. Before making the case, you will need to assemble the LED matrix.

In this case, each LED must be connected through its own current-limiting resistor.

After that, the leads from the LEDs must be connected to the platform. The controller itself will need to be connected to the real time clock module. After that, the contacts from the Arduino and the module must be routed to the clock buttons to set the time through 10 kilo-ohm resistors. They will serve as load. Finally, connect the power cable to the circuit.

Useful DIY homemade products: how household scales are made

Today, almost every home has a floor or kitchen scale. In order to independently make this useful measuring device, you need to understand its structure and principle of operation.

So, the external components of the scales include:

Weight processor;
Frame;
Screen for readings;
Platform;
Legs.

The principle of operation of the scale is extremely simple. The load, falling on the platform, presses on it due to the force of gravity, activating the strain gauge weight sensor inside the device. The strain gauge, in turn, affects the strain gage, changing its resistance. The latter transmits the signal to the analog-to-digital converter. After that, the ADC converts the signal to digital and feeds it to the microcontroller, which draws conclusions about the weight of the load on the platform, and displays the values on the screen.

When assembling the circuit, it is necessary to pay attention to the type of strain gauge.

So, for a central location under the platform of floor, commercial and technical scales, it is better to choose a single-point sensor. A block sensor is used for bending installation. In this case, you need to ensure that the strain gauge has a reliable connection to the ADC. The weight processor will help to solve the problem of connecting devices.

DIY radio circuits for home: making an electronic lock

An electrician can also be used to protect a home. So, today, homemade sites offer simple radio circuits for electronic locks for the front door. Opening such a lock using a physical key will not work.

The simplest wiring diagram for making a lock is usually based on a four-digit Johnson counter.

This scheme can be implemented in several variations. The simplest one is using the 4017 microcircuit. The principle of the circuit is quite simple: when you enter the correct code consisting of four digits, a logical unit is activated at the microcircuit input, which opens the lock.

Let's consider the operation of the device in more detail:

When the wrong keys are pressed, the circuit is restarted without triggering the mechanism through the RESET input.
The correct signal, when the key is pressed, must go to the field-effect transistor VT1, which, after opening, supplies voltage to the output corresponding to the key;
After the full introduction of the correct code, from the output corresponding to the last correct key, the signal is fed to the VT2 transistor connected to the relay;
The transistor is activated for a time that determines the capacitance of the capacitor;
The relay opens the actuator (eg latch).

In order to open such a lock, you will need to sort out about ten thousand different codes. In this case, the numbers on the code should not be repeated. That is, the code 3355 will not be possible, all digital values must be different.

Most electronic homemade products that are made by modern craftsmen are designed to perform ordinary household tasks faster and better than authentic devices. So, for example, an electric spinning wheel will significantly speed up the process of creating yarn. You can quickly make an electric spinning wheel by placing an electric motor on an authentic device.

At the same time, the motor for the electric spinning wheel must have a power of at least 15 watts.

As a motor, it will be possible to use a motor from a fan, an auto cleaner, a turntable. Use the pedal to operate the engine. It will be possible to change the movement of the motor by including a TP type toggle switch in the circuit, which provides the connection of a capacitor and resistance to different windings.

An electric swatter will be useful, easy to assemble and operate.

In order to implement such a mechanism, it will be necessary to assemble a standard blocking generator. In this case, you will need to remember to insulate the fly swatter handle.

Where to find amateur radio circuits and homemade products

Modern sites of radio amateurs offer to make not only useful, but also unusual radio self-made. So, for example, on the Mozgochina website, you can find interesting electronic circuits for making reminders for the refrigerator, thermometers that change color depending on the temperature, etc.

Electric things for everyday life and crafts from scrap materials for fishing from the site “Visiting Samodelkin” will be interesting and useful.

You can read about how to design, debug and manufacture electronic mechanisms at home in the book "Entertaining radio electronics". Novelties among radio self-modelers are often published by the site “Workshop of the radio amateur”. New issues of the Radio Amateurs magazine contain interesting and useful technical materials.

DIY homemade products at home (video)

Radio amateur circles are, today, popular with both schoolchildren and adults. Master classes and radio circuits presented on various sites allow you to assemble almost any electrical appliances at home. The main thing is to find the necessary circuits, strictly follow the instructions, and adhere to safety precautions when working with electricity. And you can collect whatever you want!

If you have a low-frequency speaker lying around somewhere, then it will not be bad for him to assemble a simple amplifier for a subwoofer on tda7377

Car radio from module with aliexpress

DIY lithium battery 12 Volts

Many people use the popular 12 V 7.2 Ah lead-acid battery in some devices. This battery can be found in many devices, from children's electric vehicles to UPSs, or systems to keep critical devices energized in the event of a power failure. Why is he so popular? Price is its main advantage and, probably, the only one.

connecting a voltmeter with aliexpress

A voltmeter with REM came to me by mail from China. The first thing I did was test it at home using a computer power supply. And by the way, I will say something else. some people wrote to me that REM does not work on them, and that the voltmeter works constantly, even with the GU turned off. At first I thought so too.

Booster for starting a car with your own hands

When winter approaches, a frequent problem for drivers is that the battery may not always start the car, it is either hooked up, and the battery itself does not work very well in the cold.

A good solution would also be to create DIY booster.

In simple terms, this is the same external battery (power bank) as for the phone, only this time for our car.

Charger for car battery from modules with Ali

With the onset of the cold season, more and more often a car enthusiast has to face how to charge a battery for a car.

In this article, we do not need much, because we will collect DIY charger from modules from the well-known site-Aliexpress.

How to connect a consumer with a supply voltage of 12V to a 24V network

how to connect a consumer with a 12v supply voltage to a 24v network

(voltage converter 24v-12v)

It is known that in some cars, the on-board network is not 12 volts, which is most common, but 24 Volts.

And here some difficulties arise, but how to connect the same radar detector, or video recorder or another consumer powered by 12 volts.

To do this, it will be good to assemble a converter for a car, which will be our 24 Volts, convert 12 Volts. And you can install a cigarette lighter on these 12 Volts, and our consumers can already be turned on there.

Subwoofer box filler

How to choose a filler for a subwoofer enclosure.

When creating a subwoofer with your own hands, it is also worth considering which filler to choose for the box, and also take into account such rules as.

1) The material of the box should be as deaf as possible. (Knock on plywood 8ke and then 20ke and you will understand what I mean)

2) The box should be as strong as possible. (joints and connections must be stronger than the material itself)