Electronics
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Electronics
2 simple fixtures for fast and high-quality twisting
Due to loose twisting and poor tinning, the wires are oxidized and contact between them is broken. Over time, the place of twisting begins to gradually heat up, which can lead to a fire in the wiring. To make the connection durable, reliable and safe, we will make simple life hacks with which you can perform tight twisting of wires and high-quality tinning, regardless of your qualifications as an electrician..
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Electronics
Autonomous heater for the garage
Such Chinese devices are recommended for heating salons, bodies and car engines to facilitate their launch and create comfortable conditions for drivers in winter. The power of our unit is 5 kW, the supply voltage is 12 V. We will tell you how to use it to make an effective garage heating. What is needed Autonomous heater " Webasto ", purchased on Ali Express - //ali..
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Electronics
A simple gasoline generator from available parts do-it-yourself
Your attention will be offered two designs of the simplest home-made gasoline generator, made on the basis of an engine from a trimmer and a car generator. The power of such an installation can vary from 1 to 2 kW. It all depends on engine power and the power of the car generator. The output voltage is 12 V, but no one forbids connecting the inverter and raising the voltage to 220 V..
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Electronics
The mechanical converter from the engine from the microwave
The converter that will be discussed does not contain a single radio element. Built exclusively on two electric motors, one of which was taken from a microwave. The conversion principle is very simple: direct current is supplied to the low-voltage motor. This motor rotates a high-voltage motor (acting as a generator), as a result, it outputs an alternating voltage of up to 500 V..
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Electronics
DIY power bank supercapacitors
Supercapacitors have tremendous capacitance compared to conventional capacitors. They also have a number of advantages over lithium-ion batteries, such as: they are not afraid of low temperatures, they are not afraid of a complete discharge. All this made me turn the bank on supercapacitors. Conventional power banks, if they are idle, are discharged over time, since the elements have self-discharge..
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Electronics
A 500 V generator in your pocket. Testing the engine from the microwave
Each microwave oven has a drive for rotating dishes. This is necessary so that micro waves evenly affect the prepared food from all sides. If you have an old and unnecessary microwave, then this drive can be removed from it and it will look something like this: If this is not available, it can always be bought on Ali Express but at a ridiculous price of 1-2 bucks..
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Electronics
The simplest metal detector on a single transistor and AM receiver with decent sensitivity
An incredibly simple metal detector circuit, which even a novice amateur radio amateur will fully master. The sensitivity of such a device is comparable to commercially available models. All this is achieved through the use of a conventional medium-wave radio in its composition. The design and operation of a home-made metal detector is as follows: a high-frequency generator is assembled on one transistor according to the "three-point" scheme..
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Electronics
3 unusual homemade foil
Food grade aluminum foil is sold in almost every grocery store. Of course, we all know its main application. But there are other ways to tap into and use this interesting material. Here are three ideas below. Will need To do all three crafts you need: Food foil. Self-tapping steam. Soldering iron. LED Strip Light..
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Electronics
A simple LED flasher on an optocoupler
Optocoupler PC817 is a very common isolated element. It is available in almost every switching power supply, whether it is charging from a phone or a unit from a computer. So getting it is not difficult. Based on this transistor optocoupler, you can assemble a very simple LED flasher with a stroboscopic effect..
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Electronics
What can be done from a motor from a microwave
A large number of spent microwave ovens can easily be found at any landfill. One of the valuable parts that can be removed from the microwave is the plate drive motor. This is a 220 V synchronous motor with a gearbox inside the housing. On its basis, you can make a lot of homemade products and four ideas will be given below..
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Electronics
How to convert any induction motor into a generator
Anyone familiar with the design of an induction motor knows very well that he will not work just like that in generator mode. The thing is the lack of a magnetic field capable of creating an electromotive force in the windings of its stator. But what happens if you modify the rotor of the motor with permanent magnets..
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Electronics
How to turn a motor from a washer into a 220 V generator
The electric motor from the washing machine is very easy to find in view of the fact that it rarely fails compared to other nodes, and the machines themselves are thrown into the landfill all the time. The thing is very valuable for home-made people, considering how many simple machines can be built on its basis..
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Electronics
Connection of the washing machine motor, reverse and speed control
In washing machines, automation most often fails, in second place are bearings and rubber products. The engine is the most reliable unit, it is used in the manufacture of various home machines. But for this you need to be able to change the direction of rotation and adjust the speed. What is needed A toggle switch with two groups of contacts 220 V 15 A, you can purchase it on Ali Express ..
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Electronics
Radio on TDA7021
Many people like to listen to the radio - at home, in the car, at work, doing what they love, because broadcasting at the frequencies of VHF (88-108 MHz) is carried out in every large settlement. However, few people know that you can build a high-quality radio receiver on a chip yourself, it does not contain scarce or expensive components..
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Electronics
12 volt fusion splicer for thin metal welding
Sometimes there is a need for electric welding of small parts, which will not be subjected to a serious load. In the absence of a welding machine, this problem can be solved with the help of a battery and a graphite rod from a finger battery. Consider this method in more detail. Materials: old spoiled AA batteries; 12V battery; terminal; welding or other cable of large cross section..
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Electronics
Portable Amplifier on TDA1517
Despite the abundance of powerful microcircuit and transistor sound amplifiers, there is always a need to have a small portable stereo amplifier that does not require powerful power. Just this can be built on the chip TDA1517P, its other name is YD1517P. The “P” index at the end means that the microcircuit has a DIP 8 housing. Al..
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Electronics
Compact adjustable 24V 5A power supply
I decided to redo my laboratory power supply. Although it is reliable, it is heavy and takes up a lot of space. The desktop is always lacking. When planning a reshuffle. I decided to hang a hinged shelf and under it is full of space. The idea came quickly, I make a mounted laboratory power supply. Will need The case I will have a box from the old modem..
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Electronics
The simplest transformerless power supply for the LED matrix
To power many LED bulbs and spotlights, 12 V is required, which forces you to buy or get a power source somewhere. In fact, you can make it yourself from inexpensive parts. Materials: LED Matrix 12V 5W. 4 diodes 1N4007; 1 μF ceramic capacitor, voltage not lower than 400 V; 1 resistor in the range of 300 kΩ - MΩ; capacitor 220 uF 25 V; power cable with plug. T..
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Electronics
DIY cell phone signal jammer
With the development and spread of mobile phones, means for reading information through GSM channels have also appeared. Various spy gadgets are currently available to cybercriminals. They allow you to connect to any telephone and read information from it. Cases of remote activation of the microphone in the phone and listening to what is happening around are also common..
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Electronics
Soldering sleeves - your salvation when there is no way to use a soldering iron
Soldering wires is a complex skill that is not available to everyone. To solder well, you need practice and lack of rush. There is an alternative, very simple and faster way to connect wires using special heat-shrink sleeves with low-temperature solder. Let us consider how to use them in order to obtain no less reliable splicing of cores than with classical soldering..
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Electronics
Very simple homemade DVB-T2 antenna with amplifier
In the absence of a DVB-T2 broadcast signal of sufficient strength, it becomes necessary to use an antenna with an amplifier. Such equipment is easy to assemble with your own hands from purchased parts, the acquisition costs of which will be about $ 1. The universal amplifier SWA-99999 used in this design was used for analog television broadcasting, so it is quite possible to remove it from the old antenna..
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Electronics
Homemade Bluetooth Home Acoustic Receiver
Now many speakers are sold that have a card reader. You can install a memory card or USB flash drive. This is certainly great, but if someone wants to listen to music from their phone? You need to pull out the card and insert it into the card reader. Inconvenient after all. I decided to go the other way..
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Electronics
6 amazing experiments: electricity, magnetism, etc.
Physics is an exact science with its own laws, for the demonstration of which one can set spectacular experiments. Consider 6 interesting experiments. 1. Getting electricity from the temperature difference For experience you will need: the Peltier element; radiator from the board; microelectric motor; a cup of hot water..
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Electronics
Subscriber splitter - what you need to know
A TAP subscriber splitter is a mounting element used to create branches from one TV line to several consumers, while maintaining a pass-through signal. With it, the television signal from the main cable is divided between several apartments. Decoding of the marking of the splitters The digital marking used on the splitter housing allows you to determine its characteristics..
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Electronics
Electronic pass-through switch with any number of switches
Walk-through switches are usually used in long corridors or at large distances when you need to turn on or off in one place and turn on or off in another lighting or electrical appliances. In this case, you have to pull 3-wire or more cables. Below is a diagram of a standard feed-through switch: The proposed electronic switch is free from these shortcomings, it is installed in the junction box and buttons (switches) are connected from it in parallel with the signal wires, which can independently turn the lighting or other devices on and off..
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Electronics
DIY running lights on one chip
We propose to assemble the simplest circuit that clearly demonstrates the operation of the pulse counter with a built-in decimal decoder (decoder) - running lights. Failure to manufacture a printed circuit board for this homemade product allows you to quickly assemble and run this device. With proper assembly, the circuit does not require configuration..
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Electronics
How to make a compact and powerful pulse soldering iron
A pulse soldering iron differs from the usual one in that it heats up almost instantly. It can be used just a few seconds after being connected to the network. In this case, the pulse version is economical, has a small size and allows you to use a voltage of 6 to 12 volts. You can connect such a soldering iron through a power supply, a phone charger or from a car cigarette lighter..
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Electronics
How to make high-quality solder paste yourself
When soldering, it is very convenient to use solder paste. You can buy it or make it yourself. When heated, homemade pasta flows better than the factory one. When soldering the twists, it penetrates deeper, which ensures the reliability of the connection. Its use eliminates overheating of parts, since during melting it changes its shade from dark to light, allowing you to react and remove the burner in time..
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Electronics
The simplest running lights on just one chip without programming
This article will help to do a useful thing in everyday life, to please yourself and your loved ones, to understand the basics of radio technology. For the manufacture of running lights you will need very little time. The necessary radio components can be bought in specialized stores, and they are inexpensive..
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Electronics
Charger for Li-Ion (Li-Po) batteries from the "electronic cigarette"
Currently, "electronic cigarettes" are quite popular. But they often fail or are simply thrown away due to a dead battery or a broken power button. However, from this device it is possible to make good small-sized “charging” for Li-Ion (and not only!) Batteries with a voltage of 3.6 (or 3.7) ..
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Electronics
How to make a charger for 10 batteries
They asked me to make a charger. The main difference from many was the presence of 10 channels. People are going to charge some lead batteries. The batteries in them are installed in weapons for the laser tag. This charger, the device can be used to charge Li-ion. For homemade work we need To install the device, I chose a box for wiring..
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Electronics
Complete check of the motor rotor
Any power tool sooner or later fails. The main reason is a malfunction of the motor. Giving a diagnostic tool to a workshop is expensive and time consuming. Therefore, it is better to find the cause of the breakdown yourself. Moreover, this is not difficult to do. The electric motor consists of two parts: a stator and a rotor..
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Electronics
Life hack: how to solder small parts with a thick soldering iron
Surely everyone in their life had such a situation when it was necessary to solder a fallen off thin wire, or to replace a very small SMD with soldering, but there was only an ordinary soldering iron on hand. It is very difficult, if at all possible, to make small soldering with a thick sting. But here a trick can come to the rescue - life hack: how to make a mini-tip for an ordinary soldering iron, which is just right for such things..
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Electronics
My laptop battery is not charging? Restore in a simple way
The laptop was idle for some time and after turning on the battery refused to charge - the situation, I think, is familiar to many. There may be other cases that result in a failure of the built-in battery. Why is this happening? - The most common reason for this is the electronic blocking of the charge process..
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Electronics
Bringing dead nickel-cadmium batteries back to life
Very often, nickel-cadmium batteries refuse to charge at a time when this is so necessary. They are especially moody and do not tolerate neglect. Failure can for the following reasons: - Recharge. - Too long been in a discharged state. - Exposed to too high temperatures. - Temporary effect. But everything is not so scary..
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Electronics
How to make a solar-powered pump for watering a garden
I once bought a centrifugal pump to water my garden to pump water from a well located nearby. And I thought about why pulling a 220 V network to the well and wasting electricity when it is possible to remake a pump for low-voltage power and power the entire structure from solar panels or a battery. Such a pump can be taken with you anywhere and pump water even from a well, even from the nearest river or lake..
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Electronics
Is it possible to restore the battery for a screwdriver without taking it apart? My experience
There are quite a few examples on the Internet how you can restore a dead screwdriver battery without even opening it. I just have two batteries lying around that cannot be charged, even if they are charged all night. The recovery method, which I will check, is suitable for batteries that are no longer charging with a standard device and for those that are fully charged, but their capacity is extremely small for continuous operation of a screwdriver..
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Electronics
A simple intercom system from a pair of old wired phones
Do you have a couple of old telephones in your pantry? - No need to throw them away - make a very simple intercom from them - an intercom. With it, you can establish a wired connection to hundreds and even thousands of meters. All for free and no roaming. At one time, with a friend, we installed such an intercom between apartments, and wires were passed through the windows..
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Electronics
220 V water battery
The chemical power source that will be manufactured in this master class has quite substantial power to get a voltage that can power 220 V network devices with it. Surely you saw articles on the Internet where electricity is obtained from a lemon by sticking two electrodes of different metals into it..
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Electronics
DIY flashlight in the bank
Once I saw how the sun's rays, refracting in a glass bottle of water, give the impression of a magical light source. There seemed to be a little sun in my bottle. I was so fascinated by this spectacle that I began to puzzle how to recreate this effect, having the opportunity to enjoy it constantly, regardless of the presence of sunlight and a certain angle of view..