What’s a Code? 1.A system of signals used to represent letters and numbers in transmitting messages. 2.A system of symbols, letters, or words given certain arbitrary meanings, used for transmitting messages requiring secrecy and brevity. -- American Heritage Dictionary
What’s a Code?. A system of signals used to represent letters and numbers in transmitting messages. A system of symbols, letters, or words given certain arbitrary meanings, used for transmitting messages requiring secrecy and brevity. -- American Heritage Dictionary. Who are these people?. - PowerPoint PPT Presentation
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What’s a Code?
1. A system of signals used to represent letters and numbers in transmitting messages.
2. A system of symbols, letters, or words given certain arbitrary meanings, used for transmitting messages requiring secrecy and brevity.
-- American Heritage Dictionary
Who are these people?
Sending messages using Clicks and Clacks:
Telegraph KeyWestern Electric Morse CodeTelegraph Sounder
How does this work?When a current flows through the induction coil, the resulting magnetic field attracts an armature that is held up against a metal arm. When the current is switched off, the armature is drops to its resting position, resulting in a "click". When the current returns, the armature is raised back to the upper arm resulting in a "clack." http://www.answers.com