Ham radio

ATTITUDE GIVES… KEYCHAIN

27.05.201813.05.2018Devices helpers

The development of purpose, verbal stimulation initiative attitude to improve the health and addictions… assistance in the development of these and other qualities will have the device, protected by patent of Russian Federation № 2109523. The design is presented to the readers.

RELAY-THE DEFENDER

27.05.201813.05.2018Himself an electrician

Modern charger (storage) and power supply units (PSUs) are equipped, as a rule, electronic protection against short-circuit (SC) output. However, in Amateur practice and meet simple network sources of electricity, consisting of only the step-down transformer and rectifier. The necessary components to complement their electronic protection sometimes the road is not for everyone and not always available.

TWO FLASHES AT ONCE

27.05.201813.05.2018Devices helpers

For portrait and other special types of shots using the flash it is often necessary to illuminate objects from different angles, but Standard… “blitz” the desired effect, alas, does not.

We offer homemade device allows you to turn on sync one camera not one, but two flashes (ФВ1, ФВ2), and this is achieved by operating lighting captured on film objects.

IN THE CAR THERE ARE NO SMALL THINGS

27.05.201813.05.2018Himself an electrician

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.

METRONOME-CONDUCTOR

27.05.201813.05.2018Devices helpers

When learning to play a musical instrument to set the tempo often use a mechanical or electronic metronome. Last and I made one of the most popular modern developments. However, during operation it was found that this device is inferior to its mechanical counterpart, with adjustable pendulum, knob, jiggle measured which are perceived as the movement of the baton of the conductor.

WAKE UP ANY

27.05.201813.05.2018Devices helpers

Currently, widespread electronic TRAVEL CLOCK and similar clock with a miniature buzzer as sound source — a reminder about the occurrence of the deadline. However, a small volume of the regular signal, as shown, are often not sufficient in order to Wake up, for example, soundly sleeping man.

MYSTERIOUSLY FLICKERING LIGHTS…

27.05.201813.05.2018Himself an electrician

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

27.05.201813.05.2018Himself an electrician

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

27.05.201813.05.2018Himself an electrician

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

26.05.201813.05.2018Himself an electrician

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.