The Internet caught the eye diagram of the automatic charger Ni-Cd batteries developed by Yuri Bashkatov. Assembled the circuit on the breadboard — not working. Modeled it on the computer using the program Work Bench. The result is what is shown in the diagram. The device operates as follows. The transistor VT1 (p-n-p) is open if at its base there is a negative potential, which may appear when the VT2 transistor (NPN) open — this, in turn, occurs if the potential at its base is installed with the variable resistor R4 will be 0.3 — 0.4 V higher than on its emitter.
SAWING STRINGS
Guitar string can optionally play to the role… for the blade of the jigsaw. To do this, cut the strings no 5, 6 or 7 must be freed from the braid, insert the jigsaw and rhombic or triangular file to make notches at the required angle. To string not springy, put it in dispute — Read more…
If during the day to measure the mains voltage, the voltmeter each time will be different. This is due to you can enable or disable individual power consumers, changing mode of operation (in accordance with the work schedule of production, process flow, etc.), that is, change the values of loads that cause instability of voltage in the networks.
Rezinomotornaya model aircraft class b-1 designed and built in the aeromodelling circle of the pioneer Chkalovsky district of the city of Sverdlovsk schoolboy Vladimir Ivanov. Speaking with her, the young designer won the regional, zonal, Republican and all-Union competitions of the Fifth model airplanes young men and juniors. And at zonal and all-Union competitions resonatory showed the maximum score of 600 points. The championship of the USSR in Novosibirsk, she was recognized as the best in its class.
a LITTLE SENSATION. “After the invention was patented not only in Australia but also abroad, the curtain of secrecy that until recently hid work Ralph Sarich several parted. The look of the new motor is strikingly different from its predecessors. A prototype orbital engine is a solid disk with a diameter of 40.6 cm, a thickness of 12.7 cm and weighing about 45 kg, which are placed around the rotor of the combustion chamber… Engine Serica develops up to 200 horsepower. According to experts, in the mass production of orbital engine due to the simple design (only 10 moving parts) will cost many times cheaper motors used in the automotive industry at the present time”. This information was placed in the newspaper “Pravda” on January 20, 1973.
Did you know that the first domestic car, which became the hero of a thousand jokes became legendary minicar, created at Zaporizhia automobile building plant? If a quick “flip through” a hefty volume of the complete collection of the works of the oral creativity of the Soviet people, one of its most significant chapters will probably be entitled “Jokes about “Zaporozhets” And this is a sign of the unprecedented popularity of this machine have a Soviet man that went from “hunchback” ZAZ-965 and “eared” ZAZ-966 front-wheel drive cars, the first of which was the ZAZ-1102 “Tavria”.
Because of the deterioration of the old Velocimetry often have to fix. The new find does not always succeed there, but another size of industry and trade not able to keep up with “different-sized” Bicycle wheels in the population. However, if you learn how to lengthen or shorten the rubber tube on your bikes and scooters kids are always on the go.
Aquarists usually determine the turbidity of the water in the aquarium, visual manner (“eye”), and beginners don’t change it until then, until it is radiating the smell. However, with the help of an electronic device, which is easy to collect a couple of free evenings, you can control the suitability of water in the tank for future use, with high precision, eliminating the notorious “human factor”. Will benefit from this approach all people and their Pets in the aquarium.