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.BUILT-IN PROTECTION
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.
The family of adapters, recently appeared a lot of new, specially designed for automatic recording of signals from the telephone line to the household VCR. Part of this apparatus includes, generally, a node of coordination of polarity and level of the input signal, and threshold-switching device.
Since ancient times people admired the music box. Their creation was only very skilled mechanics, who had besides an ear for music. Now the progress of technology made it easier. Electronic box whose schema is shown in figure 1, may collect even the ham is not very high qualifications. But a musical ear is still required.
Hams, self-repairing computers and modern means of automation or manufacturing such equipment, are faced sometimes with the need to record information in the chip programmable logical matrices (PLM). With similar problems they have, for example, to meet when you combine the joystick with the keyboard on the basis of MC КР556РТ1 (КР556РТ2). However, it may be that the existing programmer (even among the so-called universal) are not designed for firmware of these chips. To buy new, more specialized and costly electronic device is not always justified. Another thing is to modify what is already at hand.
The proposed remote control system (remote control) is executed in the form of attachment to the radio commercial production. It allows you to control ten different loads with up to eight fixed channels (the first pressing — on, second — off) and two not fixed (the operation is possible only when the button is pressed).
Devices for influencing the so-called biologically active points (BAP) are known to many. Including those created by radio Amateurs. Circuitry underlying some BAT-stimulants, saw light in the pages of “Modeller-designer” (see “modelist-Konstruktor” No. 1 and 3 in 1998). However, to implement them was proposed, as a rule, “miscomputing” database. Well, if to approach from positions of today, when even personal supercomputer are not uncommon?
Commonwealth sports and equipment… When it comes to this topic, we are Olympic records with their fantastic results and sophisticated instruments, able to capture such results.
I am convinced that any device with power supply-battery flashlight will only benefit if you provide it a makeshift terminals, providing reliable electrical contact in the connection to the battery. Moreover, the time and cost it takes a bit.