• Morse code is a very simple system of communication based on a binary system of dots and dashes to represent the different letters of the alphabet, numbers and notations to send a message by simply turning a signal on and off.
  • This code was devised by Samuel F. B. Morse in the 1840s to work with his invention of the telegraph. 
  • Before telephones were invented, it could send messages over long distances by using pulses of electricity to signal a machine to make marks on a moving paper tape.
  • A code was necessary to help translate the marks on the paper tape into readable text messages.
  • The dot duration is the basic unit of time measurement in code transmission.
  • The duration of a dash is three times the duration of a dot.
     - The length of dot is one unit.
     -  Dash contains three dots so it has three units.
     - Space between adjacent dots and dashes is one unit.
     - Space between letters = 3 units
     - Space between words = 5 units
  • They have given the shorter sequences of dots and dashes for frequently used letters.
  • For example, the most commonly used letter in the English language — E — is represented by a single dot.
  • The original telegraph machines made a clicking noise as they marked the moving paper tape.
  • It can transmitted by using radio signal usually called as CW(carrier wave). There is no modulation in this transmission, but for interrupted Morses, modulation will be done which is called MCW(modulates carrier wave).
Image result for morse code
     Advantages:
  • Simple and inexpensive
  • It can be used by someone with disability too
  • No power required for transmission
     Disadvantages:
  • Maximum speed (20 WPM)
  • Not an up to date technology