An audible alarm on digital microcircuits for switching on/off electronic devices with 12 V power supply. There are many devices in a car that are switched on by a key or a toggle switch. The switching on of a particular device can only be controlled by the click of a mechanical switch (which may not Read more…
Domestic tents with awnings sold in stores are heavy (usually about 3 kg), and without an awning, they do not protect well from rain. Imported ones are lighter and better, but expensive. Therefore, some tourists make tents themselves from thin nylon combined with an awning made of waterproof material. However, the awning complicates the design Read more…
For a fan of going to a bathhouse to steam means not only (or rather, not so much) performing a routine procedure of cleansing the body, but a ritual process of “cleansing the soul”. And often the steam room replaces many medical procedures and promotes health and even rejuvenation. So a home bath can in Read more…
A moped is often considered an expensive toy for children. And in fact, a significant portion of these two-wheeled machines are purchased by young people for purely recreational purposes. And only a small share of mopeds are used as a means of transport for business trips. And what if suddenly there is a need to Read more…
Among the various methods of connecting three-phase asynchronous electric motors to a single-phase network, the simplest and most well-known is probably the use of a capacitor called (due to the functions it performs in this case) a phase-shifting capacitor. In this case, one has to put up with the inevitable loss of power. For an Read more…
Car enthusiasts and owners of agricultural machinery know first-hand how great the danger of suddenly ending up without wheels is. That is why they are ready to go to any lengths and spend money in search of patented “secrets” (fortunately, their number has long been in the hundreds), just to protect their cars from intruders. Read more…
The idea of creating a small four-wheeled carriage with an electric drive for pleasure trips around the picturesque surroundings of Peterhof came to us last year. Before that, we built a two-wheeled vehicle that was driven by an electric drill, powered by a car battery through a transistor voltage converter. But the vehicle was difficult Read more…
Dear editors! I am a long-time subscriber of yours, I have used many of the practical publications for home use and I eagerly await the next magazine every time: will there be something useful for DIYers there again? In the February issue I was interested in the article about protecting country buildings from lightning. I Read more…
In issue 6 for 2010, Modelist-Konstruktor told about repair and adjustment of a trimmer – a motor or electric scythe. The article is useful . What can I say, this tool is now widely used not only by summer residents and janitors, but also by farmers. Meanwhile, on small plots, in hard-to-reach places, an ordinary Read more…
Instead of the usual steering wheel, I installed a column of the front manual drive of a two-stage chain transmission on the bicycle machine (Fig. 1). When moving, depending on the height of the cyclist, the angle of the column can be easily changed. The saddle is moved back. Both wheels are leading, have five-speed Read more…
