Someone who knows Morse code or just going to study it, can build a simple device, shown in the figure. On a plywood Board install the battery B and the lamp L of the flashlight. Contactor In the manufacture of contact plate faulty relay. Now connect the parts to each other by wires. To increase the “range” of the Telegraph, put a lamp made from tin or heavy paper tube — a tube length of 20 cm.
Recommend to read
SO AS NOT TO SUFFER HANDS
To work with vibrating hand tools or tool is good to have a "antifibrogenic". To manufacture them is not difficult. Enough to the palms of the usual gloves to sew the strip or plate of...
THE SLEDS, HAND TRUCK
Zaim standard of six acres, for several years in a row are unique, by definition of neighbors of a vehicle are both upgraded sled, and manual single axle truck. He was convinced at the...
