The importance of the correct operation of electrical equipment, of course, indisputable.
About how to improve its reliability, described in the thematic selection prepared by our author.
Himself an electrician
MYSTERIOUSLY FLICKERING LIGHTS…
It’s hard to imagine New year without festive lights and a Christmas tree with a mysterious flickering lights. However elektrogirlyandy industrial manufacturing not everyone is like: get bored of the monotonous flashing, and is harmful, they say it’s for health. I propose to replace these “flashers” an improvised device, lights which Shine like candles — with smooth change of brightness. Among its advantages are the simplicity of an electric circuit, which will be able to collect anyone, and the lack of scarce or expensive electronic components.
LASER SHOOTING
Popular infantile pastime became now the so-called laser (light) pointer. Produced as a miniature working tool for teachers, lecturers and guides, it attracts the daring fans of science fiction an opportunity to play “the hyperboloid of engineer Garin”, highlighting the highly directional light beam of a particular item of interest at a considerable distance.
ON HEADPHONES
Currently on the market are a large number of active speakers for PCs but speaker sound quality is at least not lower than 15 ° C, to many can’t afford. The vast majority makes the choice in favor of cheap small speakers, the sound of which quite corresponds to the price, but…
LASER PHONE
Materials about the specific features and infinite possibilities of lasers, including semiconductor, have been published in the journal “modelist-Konstruktor” (for example, No. 8’2001). Told also of how to adapt widespread laser pointer (LU) in a homemade optic dash, where it emitted the light pulse performs a function of photon bullets (see “modelist-Konstruktor” No. 12’2001). It was stressed that luminescence intensity and a number of other physical parameters LU depend on the voltage applied to the laser led.
RELAY PROTECTION
Voltage instability in the regional power lines, unfortunately, are not so rare. Especially during strong winds, when the wires of overhead lines of 0.4 can overlap. Because of the suffering of electro-, radio – and TV equipment, included in the housing network, where the voltage can suddenly become equal, say, 100, or Vice versa, 350 V. However, for my appliances I have five years did not worry, as the anomalous voltage in the network it protects a homemade relay system.
SVETOOPTIKA! ANY!
Most machines of lighting effects (AES), including homemade design for the decoration of discos, Christmas and other holidays (see “modelist-Konstruktor” No. 4 and 5 in 1995), can at best give only a reprogrammable combinations of light. Even with all the variety of used circuit design, these devices usually can not at least in a time interval arbitrarily change the order of playable effects and patterns. I offered as my development devoid of these shortcomings.
ANTENNA IN HASTE
Anyone who at least once in a lifetime chance to deal with wires, you can make original TV antenna (Fig.1) no worse than industrial zigzag.
The idea of this simple device I made in the years of his student life. The antenna was so successful that they continue to use it. The familiar “spread”, and they liked the design, which was given the name “Student”.
FUSE-“PHOENIX”
Overcurrent, short circuit for power supply… To protect against this scourge in the apparatus used old world as the means of fuses. Some are mounted in a special cartridge-holders, others are soldered in the circuit Board that simplifies the design itself, but complicates the replacement of burned out “inserts” healthy.
BATTERY — 220!
Nowadays there are cases of power failure. In such a situation, can save the emergency power supply. For example, from a car battery with a homemade voltage Converter 12/220 V. Saw: stock power is enough for several hours of modern television, the lighting of the lamp or other appliance with power up to 100 watts. The maximum current consumption from a battery does not exceed 11,5 A.
