“Open Sesame” — with these words, the resourceful and brave Ali Baba opened the magic door to the cave with treasures. Let’s imagine that Ali Baba is solving a more difficult task — trying to open the door to another cave, the entrance to which is blocked by a magic barrel. It can rotate around Read more…
In the household there is occasionally a need for longitudinal sawing of long boards into beams or battens, trimming chipboard (particle board) to size, or performing similar operations with other comparable building or furniture materials. Anyone who has done such work with a hand saw knows how tedious and laborious it is, especially when several Read more…
This lock is suitable for a garage door-gate or even a garage, whether from inside or outside. It is sturdy because it is massive and has no shackle into which a burglar can insert a crowbar (against which, as is known, there is no defense). In principle it is similar to the design already described Read more…
This device can quickly and accurately measure, for example, the temperature of a human body, water, and air. An electronic thermometer is needed by agricultural workers to determine the temperature of grain, potatoes, and soil, and by medical workers. The thermometer consists of five main units: a temperature-to-frequency converter, a rectangular pulse generator, a pulse Read more…
The automation device I designed is intended for farmers and owners of dachas with an autonomous water supply system whose key elements are a water source (river, lake, well or borehole), an electric pump and a pressure tank. Unlike similar devices, this one not only performs the main function—controlling the electric pump—but also handles security Read more…
Livestock productivity depends not least on the temperature of the water that animals drink. Warm water is also required for farm needs. That’s why it’s so important to control its heating at any time of the year. This can be entrusted to a simple automatic device. By the way, it will also take care of Read more…
More and more cars are produced every year. Today behind the wheel you can find people of almost any profession—engineers and doctors, architects and workers, farmers and teachers. How to operate a car properly—when to change oil, how to choose spark plugs, what to do when something goes wrong—can be learned from the relevant manuals Read more…
Over the years of being passionate about water tourism, we have tried several variants of carts for transporting kayaks and equipment. And on hikes, we have seen many different portable transport devices. But all of them had design flaws that did not allow them to be used equally well both in short weekend hikes and Read more…
When heating a fireplace or sauna stove at a dacha with wood, the combustion process must be monitored from time to time: adding firewood, increasing draft, etc. The proposed electronic device can replace the “owner’s eye” and remind of this by signalling when the flame in the stove (firebox) diminishes. I experimented a bit and Read more…
Long-term storage of fresh vegetables and fruits is quite a challenge, especially in urban conditions. After carefully studying publications on mini-storage units («M-K» No. 2, 1984, «M-K» No. 8, 9 and 11, 1985), I must note that all these designs have rather complex thermoregulation systems and are made from materials that are rarely available in Read more…
