Electronics. Page 8

The most affordable ready-made generator for assembling a wind generator is a car one. You can buy it for almost nothing at a salvage yard. The only problem is that it generates energy only when the rotor winding is excited. For this reason, make

Not every power tool has a speed controller. But this is a necessary function that improves the quality and comfort of work. To adjust the speed mode of a non-adjustable tool, you can assemble a simple regulator with your own hands. You do not

Devices and instruments containing SMD components are used everywhere. Today, all LED lamps are made using LED technology. The elements emitting light flux are nothing more than LEDs. Like any semiconductor SMD element, LED

To receive free electricity, it is very profitable to use a wind generator where there is no fixed network.Unlike solar panels, it can generate electricity even at night, as long as there is sufficient wind. Collect

Typically, a diode is used to protect against polarity reversal. The solution is very simple, but has a number of disadvantages: even if you use a Schottky diode, you cannot avoid a drop of at least 0.4 V. Also, at significant currents, about 10 A, the diode begins to heat up and

When you spend a long time in nature, there is nothing to recharge a discharged phone. The power bank may last for several charges, after which it will run out. For such situations, it is a good idea to have a generating charger, the electricity in which

The simplest factory-made household air conditioner costs several thousand rubles in a store. But this split system can be successfully replaced with a cooling device assembled from old components of a passenger car cooling system. Moreover, for this purpose not

It is not always convenient to drill metal workpieces on a drilling machine, clamping them in a vice. When using them, it is difficult to position the part at a certain point. It is much more convenient if it is held by a powerful electromagnet. Make the last one

When buying inexpensive power banks, you probably noticed that its actual volume is absolutely not true.Often the manufacturer claims 10,000 mAh, when in reality the actual capacity is 2-3 times less. At the same time, such a power bank is sufficient

There are many necessary useful electronic devices and devices that require a voltage of 5, 12, 24, 36 V to power them. A regular power bank is not enough for charging smartphones. If you use different devices with rated

It is very easy to make a small-sized circular saw powered by a battery with your own hands from PVC pipes and a medium-power electric motor of the 775 series. The engine power is quite enough to cut not only plywood, but also boards according to the size of the disc.

Power tools are often not suitable for fine woodworking. It removes too much wood at once and is difficult to control. However, if you make such a mini router, you will be able to accurately and efficiently even engrave on

Soldering SMD components with a conventional soldering iron is a very complex process. If you have a similar job to do, but you don’t have a commercial heat gun, then make it yourself. To do this, you just need to make a small upgrade to your soldering iron.

I decided to make a Powerbank and not just any, but a large one. There are a lot of these in stores. It won’t be difficult to assemble one like this yourself. I have an assembly of batteries connected in parallel with 18650. The total capacity of the batteries is 20000 mAh. I have already

An interesting device is made in the form of a simple discrete regulator and is designed for a two-stage increase in electrical power supplied to a light bulb or other load from a direct current source. At the moment of applying voltage

Most electric scooters in stores have a flimsy frame that can hardly withstand riding even on relatively good roads. If you plan to ride not only on asphalt, but also carry loads with you, then perhaps you should think about

The battery of a cordless screwdriver has a much shorter lifespan than its motor and ratchet. As a result, it fails when everything else is quite working. If the same thing happened to your screwdriver, you can remake it from

In modern times, it has become increasingly inconvenient to use wired headphones. And not all smartphones have a connection socket for such wired devices anymore. If you have headphones with high-quality sound lying around, then their

An amazing and rarely seen flasher circuit, which is built on just one transistor. The device is designed to smoothly periodically turn on and off the LED at a speed of approximately one cycle per two seconds. Maybe

Very often, home-made workers, when building drills or miniature drills for circuit boards, use DC electric motors. It’s just not very convenient to use such tools, even with an regulated power source. Because

The inverter is designed to produce 220-volt alternating voltage from low direct voltage. Connects to any 12-volt source, incl. to the car battery through the cigarette lighter socket. Load power can reach

One of the interesting high-voltage devices is the Van de Graaff generator, a device that creates a high potential difference due to the electrification of a dielectric tape moving along two rollers. Depending on the scale of the device, it varies

The control device is designed to work with any low-power DC motor. The engine power is limited only by the characteristics of the transistors used in the circuit. The circuit can be powered from a finger-type

An electric drill and drill are available in most home workshops and garages. Both tools have disadvantages. They need 220 V alternating current. Small parts cannot be processed with a drill. The drill has low productivity. On