It is easy and convenient to clean the floor in the Studio or room with any ordinary MOP, the “dressed” Terry cloth Velcro.
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CONTACTLESS CAPACITIVE RELAY
The basis of a capacitive relay — a low-power generator of high frequency such as local oscillator of a radio receiver. To the circuit L1C4 (see diagram) of the connected metal plate...
CASE FOR LENSES
At small works use a magnifying glass, placed for convenience in a frame of vinyl plastic. In a square plate, 4 mm thick, cut a circular window with inside recess (groove) in which...