More rapidly advancing digital satellite TV, coming to replace the bulky radioligand lines. The population of our vast country, even in its most distant corners, appeared a real possibility of a wide choice of television channels with excellent quality of image and sound. Therefore, a great demand began to use satellite receivers with antennas in the form of “saucers.” Installation of reception of the electronic equipment does not cause trouble, but with the installation of the antenna sometimes there are difficulties: for example, in the zones of “shade” trees, high buildings, etc. In some cases, the reception of the satellite TV signal even becomes impossible. There is a need to install antennas as high as possible to get out of the “shadows.”
Read more
Playing the electric guitar that uses the effect of “wah”, artist often have to press a pedal of a special electronic device. This often distracts the attention of the guitarist. In the console, the description of which we offer today, control the “wah” is made automatically from the signal of an electric guitar — like playing solos and chords. The device can be used with the pedal “wah”, in which alteration of the timbre is a variable resistor.
Usually they work, if it is correct to type the code on the keypad. Electric locks, which are placed in this article, operate on a different principle. The key for them is a small socket with the pins, for example, finger lamp. Socket is the base — it installed schema key. When enabled, a lock is triggered. And, as we have commotional lead wires, to reveal the secret of the castle will not succeed.
I work as an electrician. This profession is serious, requires not only deep knowledge in this field, but also special care with electricity trifled with. I have to work in different conditions—indoors, and outdoors in any weather. Here without nice and friendly equipment assistants can not do. So I try to keep up with the technology of today, follow the latest developments in the technical literature, including in popular science. Do not bypass the attention and homemade. I learned a lot of useful information from publications in the magazines “modelist-Konstruktor”, “Radio”, etc. One of my first homemade probe, the design of which was published in the “Modeller-designer” № 5 for the year 1990.
Monophonic electronic musical instrument (see figure) is assembled on a single chip К176ЛА7 containing four two-valve “AND—NOT”. On D1.1 is made the generator of frequency vibrato. The oscillation frequency at its output is 5-8 Hz. For valves D1.2 and D1.3 tone generator, and the D1.4 — the generator of high frequency oscillations. Thanks to our latest AMY can be used as a prefix to any radio receiver having a medium wave range.
Remote from the television station areas, in zones of uncertain reception of television signals of meter (MB) and decimeter (UHF) ranges have to install industrial television broadband antenna of the type ASP-8W, “LOCUS”, “DELTA”. Each of these antennas comes with a amplifier which can have a different magnification strength of incoming signals and is chosen for specific conditions of admission (for example, SWA14 gives signal gain 32 dB, SWA9000 — 38, SWA1L — 8 to 10 dB).
The safety device that signals the limit of the battery, must have for every modeller. The scheme of such a simple electronic device — figure 1. The unit is connected to the battery pack and press the button S2. If the supply voltage exceeds 10 V, relay K1. But as soon as this value is reduced to 10 volts, Zener diode is closed and relay K1 is de-energized. Contact K1.1 includes a signal lamp H1.
Adjusting the temperature of the local heating using the original heating element. The idea of local heating of a small area is implemented with the help of available details that it will probably in the reserves prudent owner, including, of course, owned and hams. Moreover, as the heating element applied to ordinary fixed resistor with a power dissipation of 2 watts. Depending on the power and resistance of the constant resistor can be achieved heating limited site to a temperature of -40 °C or even 60 °C.
This scheme will be useful for those who grow in the aquarium ornamental fish. As you know, aquarium Pets should be illuminated most of the day. Industry produces automatic timers, lighting for aquariums and air compressors (pumps) that operate according to a given algorithm. The proposed device, checked by the author, is able to replace industrial automation.
Carbureted internal combustion engines with ignition systems with contact breaker are used in automobiles, motorcycles, motor boats and other vehicles. For such systems uses a variety of so-called electronic ignition systems, improves the process of interrupting current.