Here’s a simple device, which you can use per minute to make any small spiral spring. A u-shaped bracket with the rows of holes and some steel tap wrenches of different diameters — all that is required. Insert in the corresponding hole of the bracket selection tool, thread through the top hole and the slot of the nose of the crank end of the wire And twist the handle.
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THE INDICATOR OF BURNING OF A FUSE
That fuse in the radio, will alert you to the simple automatic device, scheme of which was published the magazine "Radio Fernsehen Elektronik" (Germany). While a fuse F1 (see figure),...
PROBE FROM SYRINGE
Excellent probes for the tester and other measuring instruments are obtained from ... disposable syringes. To do this, in the bottom of a plastic cap with an awl is pierced through hole,...
