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TELEGRAPH
Developed by Samuel Morse.
First global communication system with today's characteristic.
Telegraph statiton had a transmitter and a receiver.
How telegraph work
Morse Code used to be understood by the sender and receiver -
FIXED TELEPHONE
Invented by Antonio Meucci, but patented by Alexander Graham Bell.
Allow to talk to anyone anywhere in the world with a simlpy number.
Story of thelephone
Parts of a telephone
How does the telephone work -
RADIO
Invented by Reginald Fessenden.
Telecommunicaton system that transmits sound through radio waves.
How does radio work
[How does a basic radio receiver work]https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Single_tube_triode_receiver_circuit.png/360px-Single_tube_triode_receiver_circuit.png)
History of radio -
TELEVISION
Invented by many engineers, John L. Bird, Charles F. Jenkins and Vladimir Zworykin.
Telecommunication system that transmits sound and moving images synchronised.
How does TV camera work
Image is created in a televison thanks to pixels
History of TV -
MOBILE PHONE
Invented by Martin Cooper, he was inspired by a "COMMUNICATOR" of the series Start Trek
Wireless telecommunication system that communicate throught radio waves
Story of mobile phone
Mobile phone network
SIM card allows phones to be identified by the mobile network and can transmit voice and data
