LIGHT TELEGRAPH

LIGHT TELEGRAPHSomeone 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

  • ON THE SCHOOL – “CRAYON”ON THE SCHOOL – “CRAYON”
    With a minimum of welding operations, avoiding difficulties of manufacturing in more modest circumstances than the school shops complex assemblies and precision parts to make your...
  • WEIGHTLESSNESS… IN THE CLASSWEIGHTLESSNESS… IN THE CLASS
    The phenomenon of weightlessness allow you to demonstrate on a normal school lesson original instrument, developed at the physics Department of the Khabarovsk pedagogical Institute, the...