Morse code is an on-off signal code, which represents different English letters, numbers and punctuation marks through different arrangement orders. It was invented in 1837, and the inventor is controversial, whether it is American Samuel Morse or Alfred Weil.
Morse code is an early form of digital communication, but it is different from modern binary code, which only uses zero and one or two states. Its code includes five types: dots, dashes, pauses between dots and dashes, moderate pauses between words and long pauses between sentences.
Extended data:
Morse password is simple and clear, and there is almost no ambiguity. The code is mainly represented by two characters: ""and "-",one is long and the other is short, which is used in many occasions, such as sending distress signals. In the movie Wind, Moore code is sewn on clothes to spread the news. This method is used in the cartoon Detective Conan and Reasoning Confrontation, New vs Okiya Subaru (tv5 1 1).
When Moore's password light is used to call for help, it is defined as "-"light is on for a long time and "."When the light is on for a short time, then all kinds of information can be sent out through the switch of the flashlight, such as distress information.
If the lights are displayed according to the law of "short bright dark short bright dark short bright dark short bright dark long bright dark short bright dark short bright dark short bright dark short bright short bright short bright short bright short bright short bright short bright short bright short bright short bright", then it means SOS.
Because the Moore code of SOS is:-This code is actually very simple, three short three long three short.
In addition to lights, distress signals can also be made by sound (two different sounds). This way of asking for help is something we should all know, and maybe we can use it when necessary.
This is a combination of some special points and strokes. They are connected by two-letter Morse code, which can save the interval time necessary for sending as two letters at ordinary times.
Ar: —— (Stop, end of message)
As:- (waiting)
K:———— (Inviting to transmit a signal) (generally, it means "your turn" with AR)
Sk:———— (Termination, end of contact)
Bt: —— (separator)
(I will resend the last sentence)
... (same)
..... (Error)
References:
Baidu Encyclopedia-Morse Password