To control the timely switch off the light in podsol tion spaces (storerooms, bathrooms n toilet komnatah) on the status of the switch is very inconvenient. For this purpose in my apartment for several years regularly is the simplest indicator. Its manufacture consists in the insertion of the rod of Plexiglas with a diameter of 8…10 mm hole made in the handle or door. One NC of bar ends should be coated with a transparent colored lacquer.
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With the calculation of the resonant circuits (filters) have to face almost every radio Amateur. It is proposed to sub-contract the performance of this work a personal computer, using...
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If the bath tube or sink due to the loose fitting to the drain hole allows water to enter, then restore its tightness is easiest with a rubber fingertip — just need to fit them to the tube.
