Antipyretics for children are prescribed by a pediatrician. But there are situations of emergency care for fever, when the child needs to give the medicine immediately. Then the parents take responsibility and apply antipyretic drugs. What is allowed to give to infants? How can you bring down the temperature in older children? Which medications are the safest?
Tattooing in our time is one of the personal and creative forms of self-expression. The author of the modern tattoo machine can be considered Samuel Riley - it was he who created her prototype and brought the art of drawing a tattoo to a new level. We suggest you read the article and ...
This video shows how you can make a salt lamp with your own hands, which can shine in different colors (RGB). To produce it, you do not need much: Crystals of salt; LED strip (RGB) with controller; A small box of wood and plywood; Although the video is in English, but I hope everything will be clear.
Home craftsmen often face the problem of high-quality cutting and cutting of various foams, for example, during the repair of home furniture or the manufacture of various models. Meanwhile, foam cutters with their own hands will greatly facilitate this process and improve the quality of the cut. And the most ...
A few months ago, I wanted to build a bicycle with an electric drive. For the alteration, I took a regular bicycle, purchased all the necessary parts and accessories and started to work. Changing the frame of the bike and almost completely remaking it - I was more than satisfied with the result. There was an excellent electric bicycle for 48 volts, with a capacity of 15 horsepower ....
I often have to solder a large number of small amateur radio boards and microchips, I tried several versions of branded soldering tools, but they were all rather rude for small soldering. The most successful option was a self-made soldering iron made of a resistor. It is reliable, easy to manufacture and easy to use. With his ...
In general, most of the defects in modern radio electronic equipment are associated with faulty electrolytic capacitors. In this case, the search for faulty capacitors using a capacitance meter is rather difficult, because the capacity of the defective capacitor may be quite insignificantly different from the nominal value, and the ESR value may be large. In most cases, it is ...
To date, electromagnets are used in a huge number of devices and devices. Electric razors, tape recorder, doorbell - and this is a small part of those devices where it is installed. The electromagnet device is quite simple, and in this article I will try to explain its operation principle and show you how to make a self-made electromagnet. Electromagnet is such a device, ...
Surely, many of us would like to have a stroboscope at home to decorate a small party and give it a little drive. As a rule, they are made with pulse lamps, but unfortunately they are quite expensive and have a small resource. I decided to replace the lamps with LEDs, and with confidence I will say that such a stroboscope can be used for disco ...
By making this antenna, you can significantly improve the reception quality and speed of WiFi. This requires only a few details. Its design is quite simple and in order to make it, you do not need to disassemble your computer or WiFi adapter. Another plus will be the fact that this antenna ...
Surely some of you at home or in the garage will have an old unnecessary CRT monitor that no one has been using for a long time, and it's a shame to throw it out. Especially since it is heavy, it must be carried to the alfater, etc. That's why I suggest you make of an old monitor - a cat's house with your own hands. Looks ...
Since you decided to become an electrician-self-taught, then for sure in a short time you will want to do some useful electrical appliance for a house, car or giving yourself. Simultaneously, homemade products can come in handy not only in everyday life, but also made for sale, for example,. In fact, the process of assembling simple devices at home is not difficult. You just need to be able to read the diagrams and use the tool for radio amateurs.
As for the first moment, before you start making electronic self-made items yourself, you need to learn how to read the wiring diagrams. In this case, our good helper will be.
From tools for novice electricians you will need a soldering iron, a set of screwdrivers, pliers and a multimeter. For the assembly of some popular electrical appliances, you may even need a welding machine, but this is a rare case. By the way, in this section of the site we even told, and the same welding machine.
Particular attention should be paid to the materials at hand, of which every novice electrician will be able to make elementary electronic self-made crafts. Most often in the manufacture of simple and useful electrical appliances used old domestic parts: transformers, amplifiers, wires, etc. In most cases, novice radio amateurs and electricians need to look for all the necessary means in the garage or in the shed at the dacha.
When everything is ready - tools are collected, spare parts are found and the minimum knowledge is obtained, you can proceed to the assembly of amateur electronic homemade at home. Here just, our small guide will help you. Each given instruction includes not only a detailed description of each stage of the creation of electrical appliances, but it is also accompanied by photo examples, diagrams, and video lessons that clearly show the entire manufacturing process. If you do not understand a moment, you can specify it under the entry in the comments. Our specialists will try to advise you in a timely manner!
Every day it becomes more and more, many new articles appear, then it is rather difficult for new visitors to immediately orient themselves and revise everything already written and previously posted.
I really want to draw the attention of all visitors to the individual articles that were posted on the site earlier. In order that would not have to search for the necessary information for a long time, I will make several "input pages" with links to the most interesting and useful articles on specific topics.
The first such page is called "Useful electronic homemade articles". Here we consider simple electronic circuits that are available for realization to people of any level of preparation. The schemes are constructed using a modern electronic database.
All information in the articles is presented in a very accessible form and in the amount necessary for practical work. Naturally, for the implementation of such schemes it is necessary to understand at least the basics of electronics.
So, a selection of the most interesting articles on the site on the subject "Useful electronic gifts". The author of the articles is Boris Aladyshkin.
The modern element base of electronics greatly simplifies the circuitry. Even the usual twilight switch can now be assembled from only three children.
The article describes a simple and reliable electric pump control circuit. Despite the extreme simplicity of the circuit, the device can operate in two modes: water lift and drainage.
In the article several schemes of devices for spot welding are given.
With the help of the described construction, it is possible to determine whether a mechanism operating in another room or building is operating or not. Information about the work is the vibration of the mechanism itself.
A story about what a safety transformer is, why it is needed and how it can be manufactured independently.
Description of a simple device that disconnects the load in the event of an outlet of the mains voltage beyond the permissible limits.
In the article the scheme of a simple thermoregulator with use of a regulated zener diode TL431 is considered.
An article on how to make a device for smooth switching on lamps using the KR1182PM1 chip.
Sometimes it is simply impossible to use a soldering iron with reduced voltage in the network or soldering of massive parts. Here, to the aid and can come up a power regulator for the soldering iron.
An article on what can replace the mechanical thermostat of an oil radiator.
Description of a simple and reliable scheme of a thermostat for a heating system.
The article describes the converter circuit implemented on a modern element base, which contains the minimum number of parts and allows to obtain significant power in the load.
An article on various ways of connecting the load to the control unit on microcircuits with the help of relays and thyristors.
Description of a simple scheme for controlling LED garlands.
The design of a simple timer that allows you to turn the load on and off at specified intervals. The operating time and the pause time do not depend on each other.
Description of the circuit and the principle of operation of a simple emergency luminaire based on an energy-saving lamp.
A detailed story about the popular "laser-ironing" technology of manufacturing printed circuit boards, its features and nuances.
Many electrical appliances can be repaired or manufactured with their own hands. For this house, there is always something that can be changed to perform new functions: old electronic watches, children's cars, out-of-use computers and much more. Useful crafts can always be repaired or remade. For work it is better to have a workshop with tools.
Equipped home workshop master
Power Supply
Self-made electronic devices need a different voltage supply. In particular, soldering requires an adjustable power supply. This possibility can be provided by the LM-317, which is a voltage regulator.
Scheme of regulated power supply
Devices based on this scheme 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 made by a trimmer P2. To do this, set the current 1 mA at the output voltage of the circuit 30 V.
On the chip, the more power is allocated, the greater the difference between the input and output signals. To reduce the heat it requires a radiator with a cooler.
The self-made board with the LM-317 chip is placed in the case - the computer power supply. On the front panel of the textolite is installed voltmeter and clamps to the output wires.
A simple autoprobe
The 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 self-made scheme that allows you to check electrical circuits with a resistance of up to 10 kΩ and a voltage of 6-15 V.
The two display circuits are connected in series to the battery and parallel to each other. The first consists of the resistor R1 and the LED HL1, which lights up when checking the voltage. At the same time, the battery is recharging.
Scheme and design: a) scheme of the homemade, which allows you to check electrical circuits with a resistance of up to 10 kΩ and a voltage of 6-15 V; b) homemade car breaker design
When the circuit is tested, the current flows from the battery through the circuit HL2, R2. The LED HL2 lights up. Its brightness will increase as the resistance of the circuit decreases.
Like all homemade products, a constructive probe can be performed in various ways, for example, placing it in a transparent plastic case that can be easily glued by one's own hands.
Such devices are indispensable when repairing at home electrical or household appliances. Crafts can be more complex and have additional functions.
Electrical appliances for the heat treatment of meat products without the use of fuel are made for a small number of portions and can be used at home or at the dacha. To prepare a shish kebab, with the help of an electric scrambler, there is no need to spend expensive hours of rest, standing on the street near the barbecue grill.
In specialized stores, you can choose any device, but much solves the price. If you have the skills of handling electricity, it will be much cheaper to make an electric sinker with your own hands.
Designs are made in horizontal or vertical execution. The power of the device usually does not exceed 1.5 kW. Meat is heated by means of a spiral with a tungsten or nichrome thread. All metal parts are made of stainless steel.
Typical devices are vertical heaters in the center and a skewer with a product around. They are attached from above. It is advisable to make the skewers in the form of spirals, from which the meat does not slip down during the preparation.
Type of electric stirrer with vertical execution
For quality preparation of shish kebabs with your hands, the skewer should be placed as close as possible to the heater, but so that the product does not touch the spiral. When placed at a distance the meat is not fried, but will be dried.
Pieces of the product, no larger than 40 mm, are placed on the skewer, which is vertically placed around the heater. Then electricity is switched on and the helix is heated.
The base of the heater is a heat-resistant ceramic tube, on which a spiral is wound. Mounting at the bottom is done using a special cartridge.
In the round base are fixed special cups for fat collection and a frame, which serves to hold the skewers vertically.
The cups are made of stainless steel. From below they have cross-shaped protrusions, which are inserted into the slots of the base. Inside, they have devices for fastening skewers. Fixing the cup on both sides allows them to hold the skewers vertically.
The connection must be strong and at the same time easy to disassemble for cleaning. You can make a common removable tray for all skewers.
The lead-in wire cross-section 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.
Timer for watering plants
Devices with timers are used to drip water from a container at a certain time. They can be connected to valves with any capacity.
Often branded devices do not provide the required reliability. Then old wall clocks come to the rescue, which are in good order, but the houses are no longer being used. At the ends of the minute and hour hands are attached small magnets, and on the dial - 3 reed switches.
Timer scheme 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 hours, the reed switches SA1 and SA3 are triggered and the signal opens the electrovalve. After 2 hours, the arrows will move to 9 and 12, and the current through the reed switches SA1 and SA2 will be applied to the valve closing.
The diagram shows a "rain sensor", which in wet weather closes the transistor VT1 and the valve remains permanently closed. It is also provided for manual control of the solenoid valve through the buttons S1 and S2.
You can set the clock for any time the valve is turned on.
Auto with remote control
Homemade radio control models capture not only children, but also adults. They can be used to play at home or organize real competitions in the yard. To build your own hands you will need a chassis with wheels, an electric motor and a body.
On sale there is a wide range, but first of all it is necessary to decide which machine is best done. The control panel can be wired or radio controlled.
When selecting parts, you should pay attention to their quality. The plastic should not be chipped, inclusions and other mechanical defects. Wheels are sold together with the chassis and should be easily rotated. Cohesion with the surface is better provided by rubber. Plastic wheels in this regard is much worse.
It is better for a beginner to take an electric motor that is cheaper and easier to maintain than an ICE. The body can be chosen either or made according to its sketch.
The motor, battery and radio unit with antenna are mounted on the chassis of the mini-car. If a kit with accessories is purchased, an assembly instruction is attached to it.
After the installation of the parts, the operation of the motor is regulated. The body on the chassis is installed after it all works.
The assembly of mini-copies can be made at home as follows:
- auto assembles carefully and in concert;
- materials of the parts of the model may differ from the original;
- small and minor details can be omitted.
The model can be made without a cycle on a certain car brand. Much depends on finances and the availability of free time. The assembly of a mini car at home with the child is of great educational importance.
The work on assembling the car is made according to the plan. Some details need to be bought, but old toys can be used.
The motor should correspond to the weight of the device in terms of power. For power supply, use fresh batteries or a battery.
If you use a special autoconstructor, crafts can be very diverse. Sequence of assembly:
- the first frame is assembled;
- the motor is fixed and adjusted;
- the power source is installed;
- is fixed antenna with radio unit ;
- set and adjust the wheels.
Types of radio-controlled automobile models
Many tricks of homemade work are disclosed in this video.
Electronic homemade products make life more comfortable and save a lot of money. In addition, you can find the use of old electrical appliances, so they do not dust in the pantry without a purpose. Useful handicrafts often turn out to be better than factory-made products.
In our age of new technologies it is difficult to imagine how one can manage without the high-tech objects around us. It's terrible to imagine if a TV or computer breaks down, a washing machine breaks down or suddenly the refrigerator stops freezing. Well, if an electronics engineer with an institute education lives next door. And if not? And in this our website is ready to help you.
The section on electronics is devoted to minor electronic repair of electronic devices. There are instructions with photos and video materials to create simple, but very useful electronic devices.
But the greatest interest in this section is made up of products that can be made with their own hands, with minimal knowledge of physics at the level of the school curriculum. Any schoolboy can follow the instructions in this section to make interesting electronic handicrafts of his own, thereby fixing knowledge of physics obtained in the school establishment, and also gaining vast experience in working with electronics. For those who are more or less versed in the schemes, electronic devices are provided here, which will be indispensable helpers in the home and the household.
