Elenco Snaptricity&reg - Manual (Page 85)

-84-
Snappy says: Years ago
Indians would send
messages to other tribes
using smoke signals and
a special code.
Morse Code Project #75
Educational Corner:
Morse Code: The forerunner of today’s
telephone system was the telegraph,
which was widely used in the latter half
of the 19th century. It only had two states
- on or off (that is, transmitting or not
transmitting), and could not send the
range of frequencies contained in human
voices or music. A code was developed
to send information over long distances
using this system and a sequence of dots
and dashes (short or long transmit
bursts). It was named Morse Code after
its inventor. It was also used extensively
in the early days of radio
communications, though it isn’t in wide
use today. It is sometimes referred to in
Hollywood movies, especially Westerns.
A . _
B _ . . .
C _ . _ .
D _ . .
E .
F . . _ .
G _ _ .
H . . . .
I . .
J . _ _ _
K _ . _
L . _ . .
M _ _
N _ .
O _ _ _
P . _ _ .
Q _ _ . _
R . _ .
S . . .
T _
U . . _
V . . . _
W . _ _
X _ . . _
Y _ . _ _
Z _ _ . .
Period . _ . _ . _
Comma _ _ . . _ _
Question . . _ _ . .
1
. _ _ _ _
2 . . _ _ _
3 . . . _ _
4 . . . . _
5 . . . . .
6 _ . . . .
7 _ _ . . .
8 _ _ _ . .
9 _ _ _ _ .
0 _ _ _ _ _
This simple circuit can be used for communication.
Push the press switch (S2) in long and short bursts to make
a pattern of light flashes representing the dots and dashes
shown in the Morse Code table above. You can use Morse
Code and this circuit to send secret messages to some
friends in the room without others knowing what you’re saying.
If you have a strong flashlight or searchlight then you can
send messages to friends far away at night. During World
War II Navy ships sometimes communicated by flashing
Morse Code messages between ships using searchlights
(because radio transmissions might reveal their presence to
the enemy).
Operation
MORSE CODE