Electronics. Page 4

One of the most effective ways to combat mosquitoes and other insects is bait lamps. Unlike aerosols, they do not poison indoor air, so they can be used in living rooms. It is enough to screw such a lamp into the socket

If suddenly you need a powerful turbofan with speed control for your projects, you can make it yourself from a computer cooler. Considering that the speed of a computer fan rarely exceeds 1000 rpm, after our modification

Everyone who is interested in electronics is accustomed to the classic type of increasing voltage to the required value: in the form of a single converter with or without a transformer. But there is another alternative way to get any constant voltage with

The main properties of every thing around us are its relevance, functionality, safety and appearance. By creating or already having a ready-made board (for example, from Aliexpress) of a power supply, you can improve it and match it to it

Using this thermal generator, you can charge your cell phone in places where there is no electricity. The device produces 5 V DC voltage at a load of up to 1 A. The device is based on a Peltier thermoelectric module, which is used in

To give an ordinary Chinese multimeter a new function, you need to assemble a simple attachment that will turn the measuring device into a metal detector. This is a very useful modification, with which you can not only search for metals in the ground,

You can make an extremely simple and highly sensitive hidden wiring detector yourself, without knowledge of electronics and circuit design, using a common microcircuit. The device essentially has only 3 parts and several jumpers. It does not require any configuration and

You can check the functionality of the IR remote control using your smartphone camera, but what about the radio remote control? Here everything is not much more complicated and to check the transmitter for any frequency you will need an ordinary Chinese multimeter. An elementary method will also allow

In order for a digital antenna to receive signals of certain frequencies as efficiently as possible without interference, its size must be strictly calculated. We offer an adjustable antenna design for maximum sensitivity. It's being done

You can make a wind generator to generate free electricity from a motor from a home fan. To do this, you only need to carry out some minor modifications. As a converter of alternating current received from a wind generator,

An electronic device such as a rectifying diode can be created at home using available tools and knowing the processes of chemical reactions. Since the operation of the device is based on the passage of electric current in one

Many car enthusiasts are looking for an opportunity to protect their car’s battery from accidental short circuits when connecting various devices to it. A simple circuit using a common optocoupler and N-channel will help you do this.

Spot welding is used to securely connect thin-walled metal. It does not burn through steel, and also welds it without the use of consumables. For many jobs, such a device is simply irreplaceable. Let's see how it can be done

At its core, a car generator is practically no different from a three-phase asynchronous electric motor, with the exception that the generator does not use a squirrel-cage rotor, but with an excitation winding. Convert such a generator into

Eddy currents, also known as Foucault currents, occur in electrical conductors when they are exposed to a magnetic field. The principle of their operation is used in induction furnaces. You can clearly see what eddy currents are capable of in your home.

A very simple and powerful regulator without PWM and microcircuits can be assembled with your own hands using transistors. This device is suitable for regulating direct current up to 20 Amperes at voltages up to 55 Volts. This scheme can be successfully used in

One of the most common controllers for charging 3.7 V Li-ion batteries is the TP4056 series module. This is a fully automatic module with current protection, has a visual indication of charging progress on two different colored

Even in today's time of abundance of radio components, there may be an urgent need for a zener diode for a certain voltage. Let’s say the battery charger, which is so needed right now, has “flyed”. The issue of finding the necessary parts is especially acute.

Those who like to spend a lot of time outdoors, far from civilization, are often faced with the inability to recharge their phone.Even if you take a power bank with you, its capacity is only enough for a couple of charges. Having assembled such a mini for yourself

To save energy, increase service life, or simply create the desired ambiance, you can add a dimmer switch to your LED lamp. With the help of which you can adjust the level of lamp glow in large

Aluminum, due to the instantaneous formation of an oxide film on its surface upon contact with air, is practically impossible to solder. The solder just won't stick to it. It is assembled into a ball, and no matter how much you heat the part, it does not tin. We offer

An old, non-functioning lead-acid battery can be converted to a lithium-ion battery. To do this, it is equipped with a block of 3.7 V 18650 lithium-ion batteries. Even used cells, for example those removed from laptop batteries, are suitable for this. Such

The design of the windmill impeller determines how effectively it will spin when exposed to wind. Its successful design allows you to turn around at the slightest breath, when the currents seem so weak that they barely move under them

A magnetron transformer from an old microwave oven can serve as the basis for an apparatus for soldering copper products, in particular pipes.You can also use the device to heat steel parts, say, soured fasteners for easy unwinding. To