(The end. Beginning at No. 9 and 10,’01). Electronic watch embedded in an improvised universal apparatus for charging batteries differ from the standard. Instead the category “des. min.” in the output “0.1 CH” is the idea of time is here more convenient for rapid calculations. The maximum count value “of 99.9 h.” Instead of the oscillator used household electricity 50 Hz, and the input of the amplifier-limiter is used for formation of the steepness of the pulses removed from the secondary winding of the supply transformer.
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When lighting and electricity were cheap, the question of cost-conscious approach when choosing lighting stairwells seriously anyone is not intended. But life has taught everyone to count every penny, so convinced of the feasibility of using the machine include a ladder and corridor lighting (ALLCO) there is no need. The question is: which of the many existing developments to choose?
I designed a digital timer, which wrist watch, MONTANA, has a great standby time (up to 24 hours), good precision (the error is only a few seconds per day), simplicity, performance and small power consumption in the standby mode. The latter allows you to use the timer as a cost effective and pretty original clock. However, the load in this case is used with a tape cassette that is included in the reproduction, or radio receiver, tuned to the station.
Those who have read the jump by Charles Perrault or watched the cartoon “puss in boots”, remember how much trouble was the cat that didn’t want to catch mice… So it opened a white light — cats should catch mice, and mice hiding from cats. And of course, each of the parties, not wanting to be the loser, goes to all sorts of tricks: the cat sits motionless for hours in ambush, or repeatedly bypasses the possession; mouse cleverly disguises its burrow, satisfied with spare moves.
Ubiquitous electronics is steadily expanding its “activities”. Where yesterday it was considered “foreign”, today it becomes indispensable helper. Approval this fully applies to karting. Smooth engine operation and high speed, readiness “number one” at the start and scrupulous accuracy at the finish be possible in collaboration with the electronics.
This is a safety alarm device (SLD) is designed to automatically alarm (electrozone) in the case of penetration of unauthorized persons in the protected object — an apartment, dacha, garage. It is more immunity and no false positives. The unit is powered by 12-volt battery GB1 of the eight cells that consume standby current less than 5 mA.
A modern casino with excellent gambling attracts many, but to go there dare not everyone. Another thing — home electronic arcade. Here and nice and safe and the costs are minimal. On how to initiate the creation of such games, says the factsheet, which draws on materials from the Bulgarian periodical “Young designer”.
One of the problems for the citizens-owners of vehicles is the condition of the batteries. Frequent stops on subsequent runs of the engine discharged battery, a full charge from an onboard generator is at best one hour. And, as experts say, only 90 percent of waste of electric capacity is restored quickly, for some ten or fifteen minutes. The line current is reduced, and further the charge is delayed.
Generators of low frequency oscillations, as is known, can be used as a caretaker: intermittent loud noises warn of the approach of a stranger. On the same principle and made our “Keeper”. It is assembled on the transistor T1 and the transformer TR1 (Fig. 1). Load — the loudspeaker TP1. The chain of positive feedback R1, R2, R3, R4, C1 provides periodic self-excitation of the generator.
“Dear edition! In rooms 11 and 12 your magazine from 1973 published a description of the guitar in Leningrad designers and lovers Guzina O. and D. Med, hex. The tool we liked.