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
AT THE DOOR BARKS… A TAPE RECORDER
In these troubled and difficult time when the crime situation every year more complicated, the important importance of watchdog and signaling device that protects property from...
ATTENTION! THE TARGET IN THE AIR
"...In the snow two wide pits. In the middle of their wooden houses to install guns the muzzles up. Log cabins are easy to rotate and allow you to hit a flying airplane" — says in "Notes...
