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.
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
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 pulsed version is economical, has a small size and allows
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 make a printed circuit board for this homemade product allows you to quickly assemble and run
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 application
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 at specialized
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 be due to the following reasons: recharge, too long were in
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
Everyone who has a uninterruptible power supply (UPS) for the computer at home knows its one significant drawback, which flies to its owner “a pretty penny”. This is of course the fragility of its batteries. Usually, with luck, they live 3
So, let's talk about how to solder aluminum. Those who are faced with this problem know that aluminum does not solder well. The reason is a thin oxide film that quickly forms on the surface of this metal in the open air. Therefore for soldering
Phyto LED-matrix for plant illumination, having its own power driver, is connected directly to the 220 V network. It works for almost half a day every day, while its body is very hot. Necessary cooling matrix attached to
Good modern indoor antennas almost all have a built-in signal amplifier. And this is another hanging wire, in addition to the antenna cable. Therefore, as an amplifier inside the antenna, electricity is required for good work. It could be like
It is used to repel an attack. For example, feral dogs, when the device is idle, a strong smell of ozone spreads at lightning speed, which can scare away the animal, since the smell of ozone in animals is associated with a thunderstorm and
Sometimes, to make some kind of switching with the remote control, you need to get up and come very close to the managed device. And sometimes, you have to rotate the remote control and frantically, pressing the buttons, try, like a shooter to get into the infrared receiver
I have an old music center, which eventually “moved” to the country, but I really like it. Appearance of the apparatus is so-so, but the sound is simply gorgeous! I especially admire his low-frequency amplifier.
Surface mount electronic components, unlike traditional radio components, do not have flexible leads. Passive elements are made in the form of a cylinder or parallelepiped with metallized ends. In microcircuits, where there are many conclusions,