Shelving design furniture is widely used by home craftsmen. It is easy to manufacture, versatile and easy to use. It can be an open Cabinet in the workshop or in the kitchen, pantry or hallway.
And if there is a need in the doors — not necessarily to complicate the work on their device: it is sufficient to attach unbuttoned the oilcloth canopy “zip”.
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THE LIGHT WILL ACTIVATE THE SIREN
The proposed German magazine "Funkamateur" light relay is activated when light falls on the photoresistor R1 (see diagram) — when this occurs, a loud siren sound. Transistors VT1, VT2...
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