7 votes

Simply elegant, Morse code marks 175 years and counting

4 comments

  1. [3]
    Ephemere
    Link
    One thing I've always been curious about with Morse code, and perhaps someone can help me - how do you tell the difference between letters, given that they have different lengths? For example, A...

    One thing I've always been curious about with Morse code, and perhaps someone can help me - how do you tell the difference between letters, given that they have different lengths? For example, A (dot dash) and ET (dot dash) seem like they would be identical.

    2 votes
    1. [2]
      Adys
      Link Parent
      There are standard lengths of time to spend between letters, words, and sentences. I believe Wikipedia has all that information, but I'm on a phone so can't link it easily.

      There are standard lengths of time to spend between letters, words, and sentences. I believe Wikipedia has all that information, but I'm on a phone so can't link it easily.

      6 votes
      1. alyaza
        Link Parent
        yes. as follows with some clarification:

        yes. as follows with some clarification:

        Each Morse code symbol is formed by a sequence of dots and dashes.
        The dot duration is the basic unit of time measurement in Morse code transmission.
        The duration of a dash is three times the duration of a dot.
        Each dot or dash within a character is followed by period of signal absence, called a space, equal to the dot duration. (in other words, the space between components making up each letter is one dot long)
        The letters of a word are separated by a space of duration equal to three dots, and the words are separated by a space equal to seven dots.

        6 votes
  2. Hypersapien
    Link
    I'm wondering how feasible the Discworld semaphore tower system would have been in real life in the ages before electricity.

    I'm wondering how feasible the Discworld semaphore tower system would have been in real life in the ages before electricity.

    1 vote