If the crocodile clip soldered to the curved steel rod with a handle from a file, you will get rid of the inconveniences associated with driving in small nails.
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By making a mini tester, for several years I use them when repairing household electrical and radio engineering. Assembled by the classical scheme, the device allows with a sufficient...
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Among elastic oscillations of air, ultrasound (from Latin ultra — beyond, more, above), inaudible to the human ear and with a lower frequency limit conventionally taken as 20 kHz, has long...
