“What to replace the gauge?” — this question often arose during the meeting with an interesting measurement scheme. Ohmmeter, voltmeter, test transistors — these devices are difficult to imagine without a milliammeter. Nevertheless, this instrumentation can work without a dial indicator. This is easy to see, collecting scheme, in which the role of the indicator does… sound generator.EASY AND CONVENIENT
The voltage is from 1 to 12 In intervals of a single oxen allows to obtain a transformer, the circuit of which is shown in the figure. If desired, the switching is easy to implement dubplates switch. Constructive data of the transformer depends on the magnitude of the input current.
A lighter, a diagram is shown in the drawing, is intended for gas stoves. It is reliable, comfortable and safe. The device is a transistor blocking oscillator, powered by dry batteries with a voltage of SV.
The convenience of wireless remote control (RC) is undeniable. You can use them, without getting up, and the most interesting channel to enable, and the hardware on it to adjust according to the individual characteristics of perception.
Improvised medical vibroacoustic device “Vitafon” is intended for the treatment of bronchitis, sinusitis, tonsillitis, arthritis, ulcers, open wounds, fractures, bruises, hemorrhoids. Acting contact method (with continuously changing the sound frequency) at a particular organ, the apparatus excites mikrovibratsiyu affected (and adjacent to the nidus) of the tissues, activates the healing processes and recovery. A fundamental principle is the same therapeutic effect, as shown by the results of the research is a local increase in capillary blood flow and lymph flow due to reduction of hydrodynamic resistance of blood vessels within the area of vibro-acoustic influence of waves of a certain range.
Among the devices designed to destroy high-voltage discharge of mosquitoes, latausha the light bulbs, and relates my development. It does not contain scarce parts, assemble it under the force of even the novice hobbyist, and just a few hours.
For the guys from the club for young technicians Novosibirsk Akademgorodok has long been the rule: the work performed in the groups should be of a socially useful nature, contain elements of novelty and originality. When it was announced the competition “Young technology — agriculture”, butovtsy developed and produced for the collective farms and state farms the number of interesting devices. This measure humidity and temperature, automatic regulators, apparatus for determining the protein content in the wheat grains and the degree of oil contamination in the centrifuge of the tractor. Using an electronic thermometer, for example, it is convenient to measure the temperature of the grain, potatoes, soil. Guys the Steppe school Iskitim district of such thermometers are used for temperature control in potato storage.
Not every radio has a built-in protection against so-called “polarity” and incorrect connection to power supply with a known high voltage (which is necessary, unfortunately, to encounter, such as faulty alternator in the car). And payback can be the output of this equipment failure.
Inspired by the originality of technical solution, published in the journal “modelist-Konstruktor” No. 11’78, I modified the circuit for fluorescent lamps and for many years its use in residential lighting fixtures. As in the prototype, economical and not scarce ЛДЦ40 (ЛДЦ80) light up instantly, their work is not accompanied by annoying clicks and “wink” for missing an unreliable starter. And best of all — for such lighting you can even use the bulb.
It happens that the recorder or the player when you rewind the tape “do not pull” due to the large current hooked the batteries. And in many electronic games such as, Brick game (“Tetris” in China), when you enable sound for the same reason, begins to noticeably flicker LCD screen.