The heat of summer. The sky is cloudless. Without irrigation the garden can not be saved. In this case, it is good to use a plant that waters itself. The device is an electronic relay on the transistor VT1, the base and the emitter of which is connected to the plates of conductive material stuck in the ground at a distance of 3 — 3.5 cm from each other. Because raw land has a low resistance, it can be considered that the base of the transistor is directly connected to its emitter (the transistor is closed). But as soon as the soil begins to dry, a semiconductor device is opened, and actuates electromagnetic relay K1 and its contact pair completing a circuit of the actuator of the electromagnet, lifting the flap of the water tank irrigation.
Mini-tractor must admit, I’ve built without any drawings (except the sketches of parts that he had ordered Turner), so to speak, to the eye, intuitive, having all components and assemblies as compact as possible and easier for the tractor. Then, the accumulation of operating experience, many times altered it. But more on that below. Built because I needed a mechanical servant, able to perform almost all the agricultural work on the plot. Such “abilities”, in my opinion, has tractor T-25 vladimirets. He was the inspiration when building my mini. Hence the nickname — “little brother.”
The owner of a light moped (or, according to modern classification — mo-led, i.e. motorbike), equipped with engine D-8, eventually notices that his two-wheeled machine is easy enough starts, sometimes not pulling uphill or bad overcomes the roads. And engine starting by using the Bicycle pedals, on the move, not too easy. However, a moped can be improved.
Repair of apartments are usually not restricted to pure cosmetics. Frequently time some alterations, additional equipment: build utility cabinets, replacement of cornices, hanging shelves, mirrors, hangers. And this inevitably confronts us with the eternal problem: how it is fastened to the walls? Everyone has experienced domogala my favorite techniques: someone drilling holes with a drill with pobeditovym a drill, others prefer carbide punch and hammer. Well, if you need to attach something to a thin wall – for example, the current incabin boxes or cupboards? Industry in this case offers nothing to the house master. For ordinary walls, you often need something more reliable than sagaydaka over time, the wooden plug or plastic plug.
For the last four years on the initiative of the heads of model aircraft clubs in the town of Zheleznodorozhny in the Moscow region competitions school students in the new class of resinator indoors. If you compare these models with others, participating in competitions, for example, a glider and a helicopter “Fly”, the proposed resonatory more complex. Therefore, it can be recommended for the manufacture of the guys visiting the club for the second year.
