The simplest “neprolivajku” for the paint or varnish can be done EA literally two minutes, if you drive in a Board cut two nails and pull them rubber ring cut from a Bicycle or a car camera.
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ELECTRONIC “MIRACLE”
You enter the room, and suddenly light flashes, "alive" is a radio or a tape recorder. To make such a "miracle" the strength of the capacitive relay (the diagram in the figure). ...
EXPRESS”STOPPER”
Quickly and securely "to drown out" the water pipe or radiator hose when testing it for leaks by using a simple device. By rotating the handle the rubber grommet sandwiched between two...
