Impromptu organizer can be made of several end-of-life electrochemical cells with a nominal voltage of 4.5 volts (battery type “3336”). They must be extracted from paper nests, which are then to clean the inside and glue together (the more buildings, the set it would be more stable and roomier). Organizer is ready. Pencils it is better to insert a sharpened pencil up, and ballpoint pens — writing the item down.
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We are talking about miniature and low-power VHF transmitter that operates at a distance of only a few tens of meters. The contractor, using a wireless microphone, can move freely around...
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allows you to quickly verify the health of the quartz resonators. Diagram of the device consists of a generator (T1), detector (D1, D2) and DC amplifier (T2). By connecting the quartz to...
