Sales occurring in the pencil with eraser on the end is very convenient: it is always possible to erase an inaccurate line or bar.
However, to make such a pencil, if you use the appropriate cap from a ballpoint pen.
Cut off the top cap and insert the carved from a school eraser cylinder.
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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...
ASPIRIN FOR NICHROME
For soldering nichrome, the guides recommend a special activated fluxes TRL-1 or TRL-120. Not all are available. Where to find a replacement? Suggest: in the home medicine Cabinet. Check...
