Psychologists have long determined that the health of a person, his emotional state during labor or active vacation influenced by the color of the surrounding objects, walls, floors. For example, a greenish tone to soothe, and, conversely, red — toned fruit. This means that changing the color of the background environment, interior, can affect the psychological state of the person, his health. But the color of the interior items — the property is fairly constant, static; to change the color scheme of the room, will have to glue the Wallpaper, repaint the furniture, change the upholstery…
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Just 30 minutes will it take to build a simple and reliable time switch that at a given point (in the range of 1-11 h) will switch on or off any home appliance power up to 0.5 kW. The device is made on the basis of a conventional mechanical clock, for example, “amber”, “Sevani”, “Ray”, in a plastic case of which a simple device consisting of two neon lamps T-0,3, a pair of resistors VS-0,25 or MLT-0,5, the micro-switch MP-1, socket for standard plug and fuse.
“Voiced” model tractor, car or locomotive immediately “alive”, if you supply electronic simulator sound. The scheme of the device, imitating the “voice” of the internal combustion engine, printed Yugoslav magazine “Radioamator”.
Equalizers are designed for frequency correction of the playback devices. The scheme of such a device published by the Romanian magazine “Technium”. We are talking about passive bandpass tone corrector, is connected between the two amplifier stages, compensating the loss of gain in the passive circuits. Variable resistors R7 and R5, respectively, lower and adjust the lowest frequency, R10 — medium and potentiometers R13 and R15 — highest and the highest frequency.
If you are tired to constantly change the bulb, use one of the tips below. But in all cases success is achieved through a substantial reduction in voltage. In the daytime and especially at night, the voltage often reaches 230-240 V, which leads to accelerated burnout of the filaments of light bulbs. It is estimated that the excess voltage of only 4% compared to the nominal (i.e., from 220 to 228) shortens the lifespan of the bulbs by 40% and with increased “power” of 6%, this period is reduced by more than half.
No matter what the destination nor was the lamp in its package must include the shade or reflector, limiting the dispersion of the luminous flux and directing it to a functionally important area. Hence the increased demand in electronics stores, unusual chandeliers, sconces, floor lamps. And many are taken to make them yourself.
Yellow, almost sunlight fills lying under a table lamp a book. To read easily and pleasantly; but after an hour and a half, and you notice that colors start to get bored. To rectify the situation is very simple: you turn the handle-regulator, and color light changes gradually. From the solar spectrum, you can choose any — from red to dark blue, and you can change not only the colour but also its saturation.
At home we often have to work with electrical tools and appliances (electric, eletronica, furnace, etc.) at a considerable distance from the outlet. And if the extension wire has a greater length (>25 m), it becomes difficult to unwind, to reel and store.
This device whose description was published in the journal “Funkamateur” (GDR), used in various measuring devices or equipment, where necessary intermittent light or sound alarm. Moreover, the load can be connected both with the positive and the negative pole of the power source.