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
TABLE SAWMILL
Combined table circular saw is required for each model a mug. It facilitates the performance of a number of works on wood; moreover, replacing the stanochek tool, you can sand the wooden...
DRILL AS INTENDED
Often there are cases when you need to drill a hole to a predetermined depth. To do this, you will a simple device, consisting of three parts. The clamp-holder — mounts on the body of...
