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
INJECTION — PAINT BRUSH
It is very frustrating when when applying varnish or paint using a paint brush leaving out the individual bristles that violate the smoothness and evenness of the coating. To avoid this...
BUILDING A CAR
(Continued. Beginning at No. 10 in 1975.) TO ENSURE THE SMOOTH PROGRESS AND SUSTAINABILITY This task is more difficult than a lighter car. There are examples where Amateur...
