Long cord extender often gives a lot of trouble: tangle, tied knots… to get Rid of this kind of “Gordian knot” will help a simple device — a wooden cross, fixed to the bottom of a plastic bucket. The plug at the end of the cord is expelled through the hole drilled in the side of the bucket. When stored the wire for the spiral coil is placed in the bucket around the cross.
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LOOP — GLIDER
Immediately after his return from Moscow to Koktebel in the fall of 1929 Sergei asked me to do a new airframe for aerobatics, — says the aircraft designer S. N. The lyushin.— There were...
FOR BIPOLAR TRANSISTORS
This device whose description was published in the journal "Funkamateur" (GDR), used in various measuring devices or equipment, where necessary intermittent light or sound alarm....
