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
NO WORSE THAN GROVER
The familiar metal lids from bottles will serve no worse than the famous springy washers. Grover thanks to its ribbed "skirt" that will prevent accidental removing of the screws in the...
“GRANDMA,” A LAMP
Currently, it has become fashionable household electrical lamps with shades. The publication describes this decoration to the lamp, which is easy to do it yourself from simple materials....
