Backlight for light switch. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Backlight for light switch. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Lighting

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Coming home in the evening, in complete darkness, you start looking for a switch in the corridor to turn on the light without touching the mirror or something else. Probably many people have experienced this. So I decided to do backlight for switchwhich works constantly and at the same time does not consume a lot of electricity.

The scheme of the proposed device is assembled from only two parts, it will not be difficult even for a novice electronics engineer to assemble it. At the heart of the circuit (see figure) is a neon lamp L2. When the lamp is off, the current passes through the filament of its lamp L1 and through the resistance R1, on which more than half the voltage is extinguished, and enters the neon L2. At the same time, the neon lamp glows. As soon as the contacts of the switch S1 are closed, the neon goes out and the lamp in your corridor turns on.

Any neon lamp, better than imported (it is smaller). The resistance may differ from the nominal one, the brightness of the neon glow depends on it: the greater the resistance, the lower the brightness and vice versa. It is important that the wattage of the resistance is not less than 0.25 W (0.5 W in the diagram).

The device is connected in parallel with the contacts of the switch and placed directly in it. Where to make a neon hole in the switch is up to you.

Backlight for light switch

This scheme has been working for me for more than five years, it consumes a minimum, well, maybe it will make the counter one revolution per month in favor of the neon, and then I doubt it.

Publication: rp.butovonet.ru

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Physical activity is an indispensable means of combating both general health and overweight. Understanding the intricacies of such a struggle becomes especially relevant in a world that is undergoing a virtual transformation, when many are switching to remote work. At the same time, consciousness goes into the virtual space, and the body firmly sticks to the sofa and sometimes does not leave this familiar place for weeks.

Winter is the time when you can effectively deal with the fat that grows from such a lifestyle. This was found out by Canadian researchers from Laurentian University, in the province of Ontario. Scientists did not force the participants in the experiment to perform any exhausting exercises. All you had to do was to pedal the exercise bike at maximum speed ten times a minute in the evening, and then rest for a minute and a half. Moreover, the speed was determined exactly - by oxygen consumption, respectively, 90 and 30% of the peak value previously identified in the laboratory for each participant.

A quarter of an hour before the start of the exercises, the participants cooled down in a room with a temperature of 0°C. The exercises themselves were carried out in the cold. The result was amazing - the processing of fat increased more than three times compared to exercises in a warm room. A detailed study of the metabolic pathways showed that the fat that was in the muscle tissues was burned.

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