
GRAVITY INSTEAD OF SPRINGS
The door in the form of a trapezoid – not architectural elements and a simple and elegant solution to the problem of automatic closing doors that do not require a single additional detail. Instead of springs, hydraulic, pneumatic and even electronic devices works here… gravity. When opening such a door with a tilted axis (rotation Read more…






Love to collect basic and necessary household appliances. One of them is the homemade probe, which is designed not only for “continuity” of the electrical circuits in the range of 5-300 In, but also to determine the type, polarity, electric current, measure the voltage from 5 to 60 V — stand on the court readers of the respected journal. The basis of the device is a transistor analogue of the thyristor, addressed at length in “Modelis-the-designer” №1, 1999. 


Sold in stores in the domestic tent with awning heavy (about 3 kg), and without an awning — do not protect from the rain. Import — easier and better, but expensive. Therefore, some tourists do make tents of fine nylon is in combination with a tent made of waterproof material. However, the awning complicates the design of the tent, weight it and increases the “breaking down”, and the total value remains high.
