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Electric Messages: Then and Now. What will we do today? . Send a message - using yesterday’s technology Send a message - using today’s technology. Why is this experiment useful to teachers and students?. As a result of this activity, students should develop an understanding of

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Presentation Transcript
what will we do today
What will we do today?
  • Send a message - using yesterday’s technology
  • Send a message- using today’s technology
why is this experiment useful to teachers and students
Why is this experiment useful to teachers and students?

As a result of this activity, students should develop an understanding of

  • electrical communications
  • audio and visual applications of International Morse Code
  • electrical wiring, simple switches
  • teamwork
activity objectives
Activity Objectives
  • Learn about electrical based communications.
  • Learn about the Morse Code system.
  • Learn about wiring, switches, and simple circuits.
  • Learn about teamwork and problem solving.
  • Learn about the history of communication and its impact on world events.
align the project to the curriculum framework or standards
Align the project to the curriculum framework or standards
  • This should be the first thing you do together with the educator
  • Consult education standards and get help from education department to align activity with
    • Science standards
    • Math standards
    • Technology standards
history of telegraphy
History of Telegraphy
  • Ancient: Optical: Smoke signals –
  • 1800: Optical: Semaphore
  • 1832: Signal over Electrical Wires
  • 1837: Morse Code: Morse & Vale
  • 1891: World-wide cables
  • 1896: Radio telegraph: Marconi over 6 km
  • Codes, modulation, multiplexing
  • 1910: Printing telegraph
  • 1920: Telex network
  • 1970: Internet - Email
  • 1991: World-wide web
the titanic
The Titanic
  • The “unsinkable” ship set sail in 1912
  • They received warning messages from the steamship Mesaba reporting a large number of icebergs
  • The Titanic hit an iceberg and began to sink
  • Initial signal distress signal code CQD
  • “Send SOS, it’s the new call”
  • Help was very near, but Call for help was not received by the Californian, only 10 km away
your challenge
Your Challenge
  • Build a device to send a message - using yesterday’s technology
  • Send a message- using today’s technology
materials
Materials
  • Aluminum Foil
  • Battery
  • Binder Clips
  • Brass Brads/Fasteners
  • Bulb
  • Cardboard
  • Wire (insulated)
the task 1
The Task (1)
  • Build a device that uses Morse Code
  • Test the device by sending the messageSOS – Save our Souls
the task 2
The Task (2)
  • Participant A:-Think of an emergency situation, then send a message explaining the situation and ask for help. Keep it secret
  • Participant B:-Once B understands the message report group and time taken on the flip chart – time from A starting to transmit to B understanding the message

RULE No speaking, but B may nod after each letter or word. Once B thinks he understands the message he must tell A what he understands

the task 3
The Task (3)
  • Repeat the task reversing roles, but message must be different
  • Record time taken on Flip Chart
the task 4
The Task (4)
  • Repeat the task using a mobile phone message can be the same
  • Record time taken on Flip Chart
summarising
Summarising
  • A sends message to B using Morse Code
  • B sends message to A using Morse Code
  • A sends message to B text on Mobile phone

RULES

No speaking, but B may nod after each letter or word. Once B thinks he understands the message he must tell A what he understands

Record time from start of transmission to understanding the message

messages
Messages
  • Give examples of messages that are sent in everyday life today.
  • Explain and discuss
    • Importance
    • Reasons for secrecy and security
    • How is security achieved?
    • Accuracy requirements.
  • How do today’s messages differ from yesterday’s messages?
    • Technology used
    • Social requirements
    • Spam and advertising
reflection questions
Reflection Questions
  • What was one thing you liked about this lesson plan?
  • What is its main weakness if any?
  • What should be included to bring in technology used in our modern society?
  • How would you modify the instructions to improve the experience of participants?
  • How would you use it in the classroom?