Tips readers

Who has been swimming in the pool, know about the unpleasant effects of disinfected water on the mucous membrane of the eye: an unpleasant stinging, eyes red. Therefore, swimmers usually use special glasses. Widespread recently got glasses of the Leningrad scientific-production Association “Burevestnik”. It is molded from polymethylmethacrylate to the calyx, enclosed in a rubber sealing rim. They have a small disadvantage: they instantly fog up in the water, besides, organic glass is gradually covered with a network of scratches and cloudy.

Offer a design key for removing lids from cans nakatannyh. Device instantly reveals not only the Bank, but also keeps intact the lid and the rubber grommet. At the same time (most importantly!) they remain suitable for reuse.

 

Key design is so simple that you can make it does not pose any difficulties. And use the fixture can not only Housewives, but also workers canteens, cafes, where during the day you have to open hundreds of cans.

A personal computer (PC) — the device is complex, multifunctional and, of course, useful. This large address book, database, and photo albums, and much more. To imagine life without a PC is difficult. What is frustration of the user (us) when my PC after 5 to 10 minutes after turn on (or restart) and normal operation will suddenly stop responding to keyboard and TrackPoint (mouse)? With such unfriendly behavior PC ran into me. To restore the normal operation of the PC (to revive) I managed a fairly simple method, which offers readers. It forces you to implement every radio Amateur with the skills of soldering.

Each motorist had to remove the tyre from the wheel disc to repair the punctured cell. This is not an easy job. I suggest a simple tool to use which is easy and convenient, moreover, it does not damage the tyre compartment of the disc. Its main parts: rod, hooks, sleeve with loop and heel.

The proposed instrument is an improved version of the previously published article “the Indicator of the electric field” [1].

Transceiver SV MJ-2701 company MegaJet is designed for a supply voltage of 12.5 V, which, despite its “special” purpose to work as an automotive MW transceiver with power from the onboard network of the car 12, is not reasonable from the practical point of view and logic. As is well known to experienced Amateurs and professionals, the voltage of the car (meaning a car with a battery voltage of 12 VDC) when the engine is running can reach 15 In (these are the parameters of the relay controller charging battery). Consequently, some electronic and radio system (including transceivers) when operating in the vehicle fail.

The fixture is designed without a preliminary marking to make notches in the hubs of the propeller blades.

Every year increases the number of syt and Palaces of pioneers, where the pipeline automodelismo. During the construction of trails is often necessary to perform smooth transitions from concentric circles to parallel straight, which causes some difficulties. At the station of young technicians of the Leningrad district of the city of Yerevan was built trendoriginal track. Today we decided to share our experience of graphical representation of the curves of the track.

In the journal “modelist-Konstruktor” No. 3 for 2006 C. A. Kotov shared with the readers the experience in the manufacture in a home workshop metal using scrap materials, in particular, one of his options was made on the basis of the hockey stick. Developing this theme, the author offers a new development.

To build templates of the screw (side view) for a given shape of the blade (top view) and the step there are two main methods of calculation: analytical and graphical. Usually based on the following characteristics: diameter, the relative width of the blade and step. Since the amount of slip is difficult to consider in advance, based on the geometric pitch.